# ========
# captured on: Tue Sep 22 15:01:32 2015
# hostname : aphost2
# os release : 2.6.32-358.23.2.el6.x86_64
# perf version : 2.6.32-358.23.2.el6.x86_64.debug
# arch : x86_64
# nrcpus online : 16
# nrcpus avail : 16
# cpudesc : Intel(R) Xeon(R) CPU E5-4650 0 @ 2.70GHz
# cpuid : GenuineIntel,6,45,7
# total memory : 264414484 kB
# cmdline : /usr/bin/perf record -g -p 108443 
# event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0, id = { 7 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# ========
#
# Samples: 12K of event 'cycles'
# Event count (approx.): 9000777068
#
# Overhead   Command                  Shared Object                                         Symbol
# ........  ........  .............................  .............................................
#
     9.50%  postgres  postgres                       [.] HeapTupleSatisfiesMVCC                   
            |
            --- HeapTupleSatisfiesMVCC

     7.85%  postgres  postgres                       [.] varstr_cmp                               
            |
            --- varstr_cmp

     7.76%  postgres  postgres                       [.] hash_search_with_hash_value              
            |
            --- hash_search_with_hash_value
               |          
               |--0.10%-- 0x1d4108000000000
                --99.90%-- [...]

     7.04%  postgres  postgres                       [.] bcTruelen                                
            |
            --- bcTruelen

     5.95%  postgres  [kernel.kallsyms]              [k] copy_user_generic_string                 
            |
            --- copy_user_generic_string
                file_read_actor
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     4.90%  postgres  postgres                       [.] slot_deform_tuple                        
            |
            --- slot_deform_tuple

     4.05%  postgres  postgres                       [.] LWLockAcquire                            
            |
            --- LWLockAcquire

     3.98%  postgres  postgres                       [.] heap_getnext                             
            |
            --- heap_getnext

     3.82%  postgres  postgres                       [.] ExecMakeFunctionResultNoSets             
            |
            --- ExecMakeFunctionResultNoSets

     2.81%  postgres  postgres                       [.] StrategyGetBuffer                        
            |
            --- StrategyGetBuffer

     2.68%  postgres  postgres                       [.] slot_getattr                             
            |
            --- slot_getattr

     2.61%  postgres  postgres                       [.] heap_page_prune_opt                      
            |
            --- heap_page_prune_opt

     2.58%  postgres  postgres                       [.] PinBuffer                                
            |
            --- PinBuffer

     2.27%  postgres  postgres                       [.] bpcharle                                 
            |
            --- bpcharle

     2.18%  postgres  postgres                       [.] ExecScan                                 
            |
            --- ExecScan

     1.99%  postgres  postgres                       [.] heap_parallelscan_nextpage               
            |
            --- heap_parallelscan_nextpage

     1.81%  postgres  postgres                       [.] heapgetpage                              
            |
            --- heapgetpage

     1.34%  postgres  postgres                       [.] ExecQual                                 
            |
            --- ExecQual

     1.25%  postgres  postgres                       [.] ExecEvalScalarVarFast                    
            |
            --- ExecEvalScalarVarFast

     1.11%  postgres  postgres                       [.] s_lock                                   
            |
            --- s_lock

     1.06%  postgres  [kernel.kallsyms]              [k] find_get_page                            
            |
            --- find_get_page
               |          
               |--98.49%-- generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --1.51%-- do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.97%  postgres  postgres                       [.] ExecStoreTuple                           
            |
            --- ExecStoreTuple

     0.94%  postgres  postgres                       [.] LWLockRelease                            
            |
            --- LWLockRelease

     0.86%  postgres  postgres                       [.] ExecEvalConst                            
            |
            --- ExecEvalConst

     0.76%  postgres  postgres                       [.] UnpinBuffer.clone.0                      
            |
            --- UnpinBuffer.clone.0

     0.76%  postgres  postgres                       [.] PartialSeqNext                           
            |
            --- PartialSeqNext

     0.72%  postgres  postgres                       [.] ReadBuffer_common                        
            |
            --- ReadBuffer_common

     0.65%  postgres  [kernel.kallsyms]              [k] put_page                                 
            |
            --- put_page
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.64%  postgres  postgres                       [.] check_stack_depth                        
            |
            --- check_stack_depth

     0.61%  postgres  postgres                       [.] pg_detoast_datum_packed                  
            |
            --- pg_detoast_datum_packed

     0.52%  postgres  postgres                       [.] pgstat_end_function_usage                
            |
            --- pgstat_end_function_usage
               |          
               |--1.63%-- 0xc245e00497ac1
               |          
               |--1.54%-- 0x8e45800497ac1
               |          
               |--1.54%-- 0x14594300497ac1
               |          
               |--1.54%-- 0x111f0500497ac1
               |          
               |--1.54%-- 0x32cfb00497ac1
               |          
               |--1.54%-- 0x55c5b00497ac1
               |          
               |--1.54%-- 0xccad300497ac1
               |          
               |--1.54%-- 0x6024100497ac1
               |          
               |--1.54%-- 0xa687900497ac1
               |          
               |--1.54%-- 0xbdc3300497ac1
               |          
               |--1.54%-- 0x7916f00497ac1
               |          
               |--1.54%-- 0x5157600497ac1
               |          
               |--1.54%-- 0x4294500497ac1
               |          
               |--1.54%-- 0x131cca00497ac1
               |          
               |--1.54%-- 0x1629e700497ac1
               |          
               |--1.54%-- 0x13b83500497ac1
               |          
               |--1.54%-- 0xc5e5800497ac1
               |          
               |--1.54%-- 0xc186500497ac1
               |          
               |--1.54%-- 0xb106b00497ac1
               |          
               |--1.54%-- 0x7e56a00497ac1
               |          
               |--1.54%-- 0x165ba300497ac1
               |          
               |--1.54%-- 0x15031900497ac1
               |          
               |--1.54%-- 0xb041e00497ac1
               |          
               |--1.54%-- 0x17d08100497ac1
               |          
               |--1.54%-- 0x131f3c00497ac1
               |          
               |--1.54%-- 0x16884c00497ac1
               |          
               |--1.54%-- 0x20e5700497ac1
               |          
               |--1.53%-- 0xc244900497ac1
               |          
               |--1.53%-- 0xc239400497ac1
               |          
               |--1.52%-- 0xc245400497ac1
                --53.79%-- [...]

     0.52%  postgres  [kernel.kallsyms]              [k] mutex_unlock                             
            |
            --- mutex_unlock
                ext4_llseek
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.48%  postgres  postgres                       [.] CheckForSerializableConflictOut          
            |
            --- CheckForSerializableConflictOut

     0.48%  postgres  [kernel.kallsyms]              [k] mutex_lock                               
            |
            --- mutex_lock
                ext4_llseek
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.47%  postgres  postgres                       [.] pgstat_init_function_usage               
            |
            --- pgstat_init_function_usage

     0.45%  postgres  postgres                       [.] XidInMVCCSnapshot                        
            |
            --- XidInMVCCSnapshot

     0.43%  postgres  postgres                       [.] hash_any                                 
            |
            --- hash_any

     0.42%  postgres  libc-2.12.so                   [.] memcpy                                   
            |
            --- memcpy
               |          
               |--88.47%-- networkjoinsel
                --11.53%-- [...]

     0.37%  postgres  postgres                       [.] lc_collate_is_c                          
            |
            --- lc_collate_is_c

     0.34%  postgres  [kernel.kallsyms]              [k] radix_tree_lookup_slot                   
            |
            --- radix_tree_lookup_slot
               |          
               |--90.68%-- find_get_page
               |          generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --9.32%-- generic_file_aio_read
                          do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.32%  postgres  postgres                       [.] MemoryContextReset                       
            |
            --- MemoryContextReset

     0.31%  postgres  [kernel.kallsyms]              [k] _spin_lock                               
            |
            --- _spin_lock
               |          
               |--43.56%-- thread_return
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
               |--20.42%-- __mutex_unlock_slowpath
               |          mutex_unlock
               |          ext4_llseek
               |          vfs_llseek
               |          sys_lseek
               |          system_call
               |          __GI___libc_lseek64
               |          
               |--12.86%-- task_rq_lock
               |          try_to_wake_up
               |          wake_up_process
               |          update_queue
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
               |--7.74%-- do_timer
               |          tick_do_update_jiffies64
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          |          
               |          |--33.35%-- HeapTupleSatisfiesMVCC
               |          |          
               |          |--33.33%-- varstr_cmp
               |          |          
               |           --33.32%-- heap_parallelscan_nextpage
               |          
               |--5.16%-- tick_do_update_jiffies64
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          |          
               |          |--50.09%-- StrategyGetBuffer
               |          |          
               |           --49.91%-- hash_search_with_hash_value
               |          
               |--5.14%-- update_vsyscall
               |          timekeeping_update
               |          do_timer
               |          tick_do_update_jiffies64
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          |          
               |          |--50.03%-- heap_parallelscan_nextpage
               |          |          
               |           --49.97%-- file_read_actor
               |                     generic_file_aio_read
               |                     do_sync_read
               |                     vfs_read
               |                     sys_read
               |                     system_call
               |                     __GI___libc_read
               |          
               |--2.57%-- ipc_lock
               |          ipc_lock_check
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
                --2.55%-- scheduler_tick
                          update_process_times
                          tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          generic_file_aio_read
                          do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.30%  postgres  [ext4]                         [k] ext4_llseek                              
            |
            --- ext4_llseek
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.29%  postgres  [kernel.kallsyms]              [k] vfs_read                                 
            |
            --- vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.27%  postgres  [kernel.kallsyms]              [k] generic_file_aio_read                    
            |
            --- generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.26%  postgres  postgres                       [.] LockBuffer                               
            |
            --- LockBuffer

     0.26%  postgres  postgres                       [.] shm_mq_receive_bytes                     
            |
            --- shm_mq_receive_bytes

     0.25%  postgres  postgres                       [.] TransactionIdPrecedes                    
            |
            --- TransactionIdPrecedes

     0.24%  postgres  postgres                       [.] bpchareq                                 
            |
            --- bpchareq

     0.22%  postgres  [kernel.kallsyms]              [k] system_call                              
            |
            --- system_call
               |          
               |--53.65%-- __GI___libc_lseek64
               |          
                --46.35%-- __GI___libc_read

     0.22%  postgres  [kernel.kallsyms].vsyscall_fn  [.] vread_tsc                                
            |
            --- vread_tsc
               |          
               |--88.90%-- 0x7fff59744814
               |          0x7fff597448bc
               |          __gettimeofday
               |          
                --11.10%-- 0x7fff597448bc
                          __gettimeofday

     0.22%  postgres  [kernel.kallsyms]              [k] __mutex_lock_slowpath                    
            |
            --- __mutex_lock_slowpath
                mutex_lock
                ext4_llseek
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.19%  postgres  postgres                       [.] ExecProject                              
            |
            --- ExecProject

     0.19%  postgres  postgres                       [.] GetPrivateRefCountEntry                  
            |
            --- GetPrivateRefCountEntry

     0.18%  postgres  [kernel.kallsyms]              [k] __audit_syscall_exit                     
            |
            --- __audit_syscall_exit
                sysret_audit
               |          
               |--54.55%-- __GI___libc_read
               |          
               |--40.93%-- __GI___libc_lseek64
               |          
                --4.53%-- __GI___semop

     0.17%  postgres  postgres                       [.] add_abs                                  
            |
            --- add_abs

     0.15%  postgres  postgres                       [.] shm_mq_receive                           
            |
            --- shm_mq_receive

     0.15%  postgres  [kernel.kallsyms]              [k] sys_read                                 
            |
            --- sys_read
               |          
               |--57.93%-- system_call
               |          __GI___libc_read
               |          
                --42.07%-- __GI___libc_read

     0.14%  postgres  postgres                       [.] AllocSetAlloc                            
            |
            --- AllocSetAlloc

     0.14%  postgres  libc-2.12.so                   [.] __memcmp_sse4_1                          
            |
            --- __memcmp_sse4_1

     0.14%  postgres  postgres                       [.] LWLockConditionalAcquire                 
            |
            --- LWLockConditionalAcquire

     0.14%  postgres  [kernel.kallsyms]              [k] fget_light                               
            |
            --- fget_light
               |          
               |--76.48%-- sys_lseek
               |          system_call
               |          __GI___libc_lseek64
               |          
                --23.52%-- sys_read
                          system_call
                          __GI___libc_read

     0.12%  postgres  [vdso]                         [.] 0x00007fff597448a4                       
            |          
            |--20.08%-- 0x7fff597448d4
            |          __gettimeofday
            |          
            |--13.31%-- 0x7fff5974481f
            |          0x7fff597448bc
            |          __gettimeofday
            |          
            |--13.30%-- 0x7fff59744830
            |          0x7fff597448bc
            |          __gettimeofday
            |          
            |--6.69%-- 0x7fff5974482a
            |          0x7fff597448bc
            |          __gettimeofday
            |          
            |--6.69%-- 0x7fff597448cd
            |          __gettimeofday
            |          
            |--6.69%-- 0x7fff59744803
            |          0x7fff597448bc
            |          __gettimeofday
            |          
            |--6.68%-- 0x7fff597447d1
            |          __gettimeofday
            |          
            |--6.67%-- 0x7fff597448a4
            |          __gettimeofday
            |          
            |--6.66%-- 0x7fff597448d8
            |          __gettimeofday
            |          
            |--6.62%-- 0x7fff59744898
            |          
             --6.60%-- 0x7fff59744814
                       0x7fff597448bc
                       __gettimeofday

     0.11%  postgres  postgres                       [.] make_result                              
            |
            --- make_result

     0.11%  postgres  postgres                       [.] ResourceOwnerForgetBuffer                
            |
            --- ResourceOwnerForgetBuffer

     0.11%  postgres  [kernel.kallsyms]              [k] find_busiest_group                       
            |
            --- find_busiest_group
                thread_return
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.11%  postgres  [kernel.kallsyms]              [k] rw_verify_area                           
            |
            --- rw_verify_area
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.10%  postgres  libc-2.12.so                   [.] __GI___libc_lseek64                      
            |
            --- __GI___libc_lseek64

     0.10%  postgres  [kernel.kallsyms]              [k] generic_segment_checks                   
            |
            --- generic_segment_checks
               |          
               |--76.85%-- generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --23.15%-- do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.10%  postgres  postgres                       [.] advance_aggregates                       
            |
            --- advance_aggregates

     0.10%  postgres  postgres                       [.] TerminateBufferIO                        
            |
            --- TerminateBufferIO

     0.10%  postgres  [kernel.kallsyms]              [k] audit_syscall_entry                      
            |
            --- audit_syscall_entry
                auditsys
               |          
               |--75.03%-- __GI___libc_read
               |          
                --24.97%-- __GI___libc_lseek64

     0.09%  postgres  [kernel.kallsyms]              [k] touch_atime                              
            |
            --- touch_atime
               |          
               |--92.34%-- generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --7.66%-- do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.09%  postgres  postgres                       [.] do_numeric_accum                         
            |
            --- do_numeric_accum
               |          
               |--72.72%-- 0x0
                --27.28%-- [...]

     0.09%  postgres  [kernel.kallsyms]              [k] rb_reserve_next_event                    
            |
            --- rb_reserve_next_event
               |          
               |--81.80%-- ring_buffer_lock_reserve
               |          trace_buffer_lock_reserve
               |          trace_current_buffer_lock_reserve
               |          |          
               |          |--33.30%-- ftrace_raw_event_sched_stat_runtime
               |          |          update_curr
               |          |          |          
               |          |          |--66.60%-- enqueue_entity
               |          |          |          enqueue_task_fair
               |          |          |          enqueue_task
               |          |          |          activate_task
               |          |          |          try_to_wake_up
               |          |          |          wake_up_process
               |          |          |          update_queue
               |          |          |          sys_semtimedop
               |          |          |          sys_semop
               |          |          |          system_call
               |          |          |          __GI___semop
               |          |          |          
               |          |           --33.40%-- dequeue_entity
               |          |                     dequeue_task_fair
               |          |                     dequeue_task
               |          |                     deactivate_task
               |          |                     thread_return
               |          |                     sys_semtimedop
               |          |                     sys_semop
               |          |                     system_call
               |          |                     __GI___semop
               |          |          
               |          |--22.27%-- ftrace_raw_event_id_sched_wakeup_template
               |          |          ftrace_raw_event_sched_wakeup
               |          |          try_to_wake_up
               |          |          wake_up_process
               |          |          update_queue
               |          |          sys_semtimedop
               |          |          sys_semop
               |          |          system_call
               |          |          __GI___semop
               |          |          
               |          |--22.25%-- ftrace_raw_event_id_softirq
               |          |          |          
               |          |          |--50.11%-- ftrace_raw_event_softirq_exit
               |          |          |          __do_softirq
               |          |          |          call_softirq
               |          |          |          do_softirq
               |          |          |          irq_exit
               |          |          |          smp_apic_timer_interrupt
               |          |          |          apic_timer_interrupt
               |          |          |          s_lock
               |          |          |          
               |          |           --49.89%-- ftrace_raw_event_softirq_raise
               |          |                     raise_softirq
               |          |                     run_local_timers
               |          |                     update_process_times
               |          |                     tick_sched_timer
               |          |                     __run_hrtimer
               |          |                     hrtimer_interrupt
               |          |                     smp_apic_timer_interrupt
               |          |                     apic_timer_interrupt
               |          |                     LWLockAcquire
               |          |          
               |           --22.19%-- ftrace_raw_event_id_sched_stat_template
               |                     |          
               |                     |--50.23%-- ftrace_raw_event_sched_stat_sleep
               |                     |          enqueue_entity
               |                     |          enqueue_task_fair
               |                     |          enqueue_task
               |                     |          activate_task
               |                     |          try_to_wake_up
               |                     |          wake_up_process
               |                     |          update_queue
               |                     |          sys_semtimedop
               |                     |          sys_semop
               |                     |          system_call
               |                     |          __GI___semop
               |                     |          
               |                      --49.77%-- ftrace_raw_event_sched_stat_wait
               |                                update_stats_wait_end
               |                                set_next_entity
               |                                pick_next_task_fair
               |                                schedule
               |                                sys_semtimedop
               |                                sys_semop
               |                                system_call
               |                                __GI___semop
               |          
                --18.20%-- trace_buffer_lock_reserve
                          trace_current_buffer_lock_reserve
                          |          
                          |--50.08%-- ftrace_raw_event_id_sched_stat_template
                          |          ftrace_raw_event_sched_stat_wait
                          |          update_stats_wait_end
                          |          set_next_entity
                          |          pick_next_task_fair
                          |          schedule
                          |          sys_semtimedop
                          |          sys_semop
                          |          system_call
                          |          __GI___semop
                          |          
                           --49.92%-- ftrace_raw_event_id_sched_wakeup_template
                                     ftrace_raw_event_sched_wakeup
                                     try_to_wake_up
                                     wake_up_process
                                     update_queue
                                     sys_semtimedop
                                     sys_semop
                                     system_call
                                     __GI___semop

     0.08%  postgres  postgres                       [.] ReadBufferExtended                       
            |
            --- ReadBufferExtended

     0.08%  postgres  postgres                       [.] shm_mq_inc_bytes_read                    
            |
            --- shm_mq_inc_bytes_read

     0.08%  postgres  libc-2.12.so                   [.] __GI___libc_read                         
            |
            --- __GI___libc_read

     0.08%  postgres  postgres                       [.] StartBufferIO                            
            |
            --- StartBufferIO

     0.08%  postgres  [kernel.kallsyms]              [k] file_read_actor                          
            |
            --- file_read_actor
               |          
               |--89.93%-- generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --10.07%-- do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.08%  postgres  [kernel.kallsyms]              [k] __mutex_unlock_slowpath                  
            |
            --- __mutex_unlock_slowpath
                mutex_unlock
                ext4_llseek
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.07%  postgres  postgres                       [.] TupleQueueFunnelNext                     
            |
            --- TupleQueueFunnelNext

     0.07%  postgres  postgres                       [.] advance_transition_function              
            |
            --- advance_transition_function

     0.07%  postgres  [kernel.kallsyms]              [k] sys_lseek                                
            |
            --- sys_lseek
               |          
               |--55.45%-- __GI___libc_lseek64
               |          
                --44.55%-- system_call
                          __GI___libc_lseek64

     0.06%  postgres  postgres                       [.] ResourceOwnerRememberBuffer              
            |
            --- ResourceOwnerRememberBuffer

     0.06%  postgres  [kernel.kallsyms]              [k] update_curr                              
            |
            --- update_curr
               |          
               |--49.67%-- enqueue_entity
               |          enqueue_task_fair
               |          enqueue_task
               |          activate_task
               |          try_to_wake_up
               |          wake_up_process
               |          update_queue
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
               |--25.38%-- dequeue_entity
               |          dequeue_task_fair
               |          dequeue_task
               |          deactivate_task
               |          thread_return
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
               |--12.50%-- task_tick_fair
               |          scheduler_tick
               |          update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          bcTruelen
               |          
                --12.45%-- put_prev_task_fair
                          schedule
                          sys_semtimedop
                          sys_semop
                          system_call
                          __GI___semop

     0.06%  postgres  libc-2.12.so                   [.] __gettimeofday                           
            |
            --- __gettimeofday

     0.06%  postgres  [kernel.kallsyms]              [k] vfs_llseek                               
            |
            --- vfs_llseek
               |          
               |--87.49%-- sys_lseek
               |          system_call
               |          __GI___libc_lseek64
               |          
                --12.51%-- system_call
                          __GI___libc_lseek64

     0.06%  postgres  postgres                       [.] ExecStoreMinimalTuple                    
            |
            --- ExecStoreMinimalTuple

     0.06%  postgres  postgres                       [.] ReleaseBuffer                            
            |
            --- ReleaseBuffer

     0.06%  postgres  postgres                       [.] FileRead                                 
            |
            --- FileRead

     0.06%  postgres  postgres                       [.] ExecAgg                                  
            |
            --- ExecAgg

     0.06%  postgres  [kernel.kallsyms]              [k] sysret_check                             
            |
            --- sysret_check
               |          
               |--57.13%-- __GI___libc_lseek64
               |          
                --42.87%-- __GI___libc_read

     0.05%  postgres  postgres                       [.] palloc                                   
            |
            --- palloc
               |          
               |--16.67%-- networkjoinsel
                --83.33%-- [...]

     0.05%  postgres  postgres                       [.] int8_avg_accum                           
            |
            --- int8_avg_accum

     0.05%  postgres  postgres                       [.] TupleHashTableHash                       
            |
            --- TupleHashTableHash
               |          
               |--49.97%-- 0x1d72000
               |          
               |--16.70%-- 0x1d74de0
                --33.33%-- [...]

     0.05%  postgres  postgres                       [.] ReservePrivateRefCountEntry              
            |
            --- ReservePrivateRefCountEntry

     0.05%  postgres  [kernel.kallsyms]              [k] trace_clock_local                        
            |
            --- trace_clock_local
               |          
               |--66.74%-- rb_reserve_next_event
               |          ring_buffer_lock_reserve
               |          trace_buffer_lock_reserve
               |          trace_current_buffer_lock_reserve
               |          |          
               |          |--50.00%-- ftrace_raw_event_sched_stat_runtime
               |          |          update_curr
               |          |          |          
               |          |          |--50.06%-- task_tick_fair
               |          |          |          scheduler_tick
               |          |          |          update_process_times
               |          |          |          tick_sched_timer
               |          |          |          __run_hrtimer
               |          |          |          hrtimer_interrupt
               |          |          |          smp_apic_timer_interrupt
               |          |          |          apic_timer_interrupt
               |          |          |          hash_search_with_hash_value
               |          |          |          
               |          |           --49.94%-- dequeue_entity
               |          |                     dequeue_task_fair
               |          |                     dequeue_task
               |          |                     deactivate_task
               |          |                     thread_return
               |          |                     sys_semtimedop
               |          |                     sys_semop
               |          |                     system_call
               |          |                     __GI___semop
               |          |          
               |           --50.00%-- ftrace_raw_event_id_softirq
               |                     |          
               |                     |--50.03%-- ftrace_raw_event_softirq_exit
               |                     |          __do_softirq
               |                     |          call_softirq
               |                     |          do_softirq
               |                     |          irq_exit
               |                     |          smp_apic_timer_interrupt
               |                     |          apic_timer_interrupt
               |                     |          ExecScan
               |                     |          
               |                      --49.97%-- ftrace_raw_event_softirq_entry
               |                                __do_softirq
               |                                call_softirq
               |                                do_softirq
               |                                irq_exit
               |                                smp_apic_timer_interrupt
               |                                apic_timer_interrupt
               |                                lc_collate_is_c
               |          
                --33.26%-- ring_buffer_lock_reserve
                          trace_buffer_lock_reserve
                          trace_current_buffer_lock_reserve
                          ftrace_raw_event_id_softirq
                          ftrace_raw_event_softirq_raise
                          raise_softirq
                          |          
                          |--50.14%-- scheduler_tick
                          |          update_process_times
                          |          tick_sched_timer
                          |          __run_hrtimer
                          |          hrtimer_interrupt
                          |          smp_apic_timer_interrupt
                          |          apic_timer_interrupt
                          |          slot_deform_tuple
                          |          
                           --49.86%-- run_local_timers
                                     update_process_times
                                     tick_sched_timer
                                     __run_hrtimer
                                     hrtimer_interrupt
                                     smp_apic_timer_interrupt
                                     apic_timer_interrupt
                                     vfs_llseek
                                     sys_lseek
                                     system_call
                                     __GI___libc_lseek64

     0.05%  postgres  postgres                       [.] ss_report_location                       
            |
            --- ss_report_location

     0.05%  postgres  postgres                       [.] IncrBufferRefCount                       
            |
            --- IncrBufferRefCount

     0.05%  postgres  [kernel.kallsyms]              [k] ring_buffer_lock_reserve                 
            |
            --- ring_buffer_lock_reserve
                trace_buffer_lock_reserve
                trace_current_buffer_lock_reserve
               |          
               |--50.16%-- ftrace_raw_event_id_softirq
               |          |          
               |          |--66.59%-- ftrace_raw_event_softirq_exit
               |          |          __do_softirq
               |          |          call_softirq
               |          |          do_softirq
               |          |          irq_exit
               |          |          smp_apic_timer_interrupt
               |          |          apic_timer_interrupt
               |          |          |          
               |          |          |--50.12%-- HeapTupleSatisfiesMVCC
               |          |          |          
               |          |           --49.88%-- s_lock
               |          |          
               |           --33.41%-- ftrace_raw_event_softirq_raise
               |                     raise_softirq
               |                     run_local_timers
               |                     update_process_times
               |                     tick_sched_timer
               |                     __run_hrtimer
               |                     hrtimer_interrupt
               |                     smp_apic_timer_interrupt
               |                     apic_timer_interrupt
               |                     StrategyGetBuffer
               |          
               |--33.17%-- ftrace_raw_event_sched_stat_runtime
               |          update_curr
               |          |          
               |          |--50.09%-- put_prev_task_fair
               |          |          schedule
               |          |          sys_semtimedop
               |          |          sys_semop
               |          |          system_call
               |          |          __GI___semop
               |          |          
               |           --49.91%-- enqueue_entity
               |                     enqueue_task_fair
               |                     enqueue_task
               |                     activate_task
               |                     try_to_wake_up
               |                     wake_up_process
               |                     update_queue
               |                     sys_semtimedop
               |                     sys_semop
               |                     system_call
               |                     __GI___semop
               |          
                --16.66%-- ftrace_raw_event_id_sched_stat_template
                          ftrace_raw_event_sched_stat_sleep
                          enqueue_entity
                          enqueue_task_fair
                          enqueue_task
                          activate_task
                          try_to_wake_up
                          wake_up_process
                          update_queue
                          sys_semtimedop
                          sys_semop
                          system_call
                          __GI___semop

     0.05%  postgres  [kernel.kallsyms]              [k] rcu_process_gp_end                       
            |
            --- rcu_process_gp_end
               |          
               |--66.72%-- __rcu_process_callbacks
               |          rcu_process_callbacks
               |          __do_softirq
               |          call_softirq
               |          do_softirq
               |          irq_exit
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          |          
               |          |--25.11%-- check_stack_depth
               |          |          
               |          |--25.09%-- bcTruelen
               |          |          
               |          |--25.00%-- varstr_cmp
               |          |          
               |           --24.81%-- slot_deform_tuple
               |          
                --33.28%-- rcu_process_callbacks
                          __do_softirq
                          call_softirq
                          do_softirq
                          irq_exit
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          |          
                          |--50.03%-- ReadBuffer_common
                          |          
                           --49.97%-- generic_file_aio_read
                                     do_sync_read
                                     vfs_read
                                     sys_read
                                     system_call
                                     __GI___libc_read

     0.05%  postgres  postgres                       [.] PageIsVerified                           
            |
            --- PageIsVerified

     0.05%  postgres  [kernel.kallsyms]              [k] do_sync_read                             
            |
            --- do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.05%  postgres  [kernel.kallsyms]              [k] mark_page_accessed                       
            |
            --- mark_page_accessed
               |          
               |--83.41%-- generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --16.59%-- do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.04%  postgres  postgres                       [.] execTuplesMatch                          
            |
            --- execTuplesMatch

     0.04%  postgres  postgres                       [.] int4_sum                                 
            |
            --- int4_sum

     0.04%  postgres  postgres                       [.] ExecClearTuple                           
            |
            --- ExecClearTuple

     0.04%  postgres  [kernel.kallsyms]              [k] kfree                                    
            |
            --- kfree
               |          
               |--80.00%-- __audit_syscall_exit
               |          sysret_audit
               |          |          
               |          |--50.00%-- __GI___libc_lseek64
               |          |          
               |          |--25.01%-- __GI___libc_read
               |          |          
               |           --25.00%-- __GI___semop
               |          
                --20.00%-- sysret_audit
                          __GI___libc_lseek64

     0.04%  postgres  [kernel.kallsyms]              [k] task_rq_lock                             
            |
            --- task_rq_lock
                try_to_wake_up
                wake_up_process
               |          
               |--79.97%-- update_queue
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
                --20.03%-- hrtimer_wakeup
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          hash_search_with_hash_value

     0.04%  postgres  postgres                       [.] init_var_from_num                        
            |
            --- init_var_from_num
               |          
               |--60.19%-- 0x0
               |          
                --39.81%-- slot_getsomeattrs

     0.04%  postgres  [kernel.kallsyms]              [k] unroll_tree_refs                         
            |
            --- unroll_tree_refs
               |          
               |--59.86%-- __audit_syscall_exit
               |          sysret_audit
               |          |          
               |          |--66.65%-- __GI___libc_lseek64
               |          |          
               |           --33.35%-- __GI___libc_read
               |          
                --40.14%-- sysret_audit
                          |          
                          |--50.09%-- __GI___libc_lseek64
                          |          
                           --49.91%-- __GI___libc_read

     0.03%  postgres  postgres                       [.] ResourceOwnerEnlargeBuffers              
            |
            --- ResourceOwnerEnlargeBuffers

     0.03%  postgres  postgres                       [.] AllocSetFree                             
            |
            --- AllocSetFree

     0.03%  postgres  postgres                       [.] DirectFunctionCall1Coll                  
            |
            --- DirectFunctionCall1Coll

     0.03%  postgres  [kernel.kallsyms]              [k] apic_timer_interrupt                     
            |
            --- apic_timer_interrupt
               |          
               |--49.88%-- file_read_actor
               |          generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
               |--25.09%-- StrategyGetBuffer
               |          
                --25.03%-- heap_page_prune_opt

     0.03%  postgres  postgres                       [.] mdread                                   
            |
            --- mdread

     0.03%  postgres  [kernel.kallsyms]              [k] inotify_inode_queue_event                
            |
            --- inotify_inode_queue_event
               |          
               |--75.05%-- vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --24.95%-- sys_read
                          system_call
                          __GI___libc_read

     0.03%  postgres  [kernel.kallsyms]              [k] sysret_signal                            
            |
            --- sysret_signal
               |          
               |--50.05%-- __GI___libc_read
               |          
                --49.95%-- __GI___libc_lseek64

     0.03%  postgres  postgres                       [.] FileSeek                                 
            |
            --- FileSeek

     0.03%  postgres  postgres                       [.] AllocSetReset                            
            |
            --- AllocSetReset

     0.03%  postgres  [kernel.kallsyms]              [k] security_file_permission                 
            |
            --- security_file_permission
               |          
               |--75.10%-- vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --24.90%-- rw_verify_area
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.03%  postgres  postgres                       [.] _mdfd_getseg                             
            |
            --- _mdfd_getseg

     0.03%  postgres  postgres                       [.] FileAccess                               
            |
            --- FileAccess

     0.02%  postgres  [kernel.kallsyms]              [k] native_write_msr_safe                    
            |
            --- native_write_msr_safe
               |          
               |--99.97%-- intel_pmu_disable_all
               |          x86_pmu_disable
               |          perf_pmu_disable
               |          perf_adjust_freq_unthr_context
               |          perf_event_task_tick
               |          scheduler_tick
               |          update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          |          
               |          |--33.34%-- PinBuffer
               |          |          
               |          |--33.33%-- HeapTupleSatisfiesMVCC
               |          |          
               |           --33.33%-- ExecEvalScalarVarFast
                --0.03%-- [...]

     0.02%  postgres  postgres                       [.] IsCatalogClass                           
            |
            --- IsCatalogClass

     0.02%  postgres  postgres                       [.] BufTableHashCode                         
            |
            --- BufTableHashCode

     0.02%  postgres  postgres                       [.] int64_to_numericvar                      
            |
            --- int64_to_numericvar

     0.02%  postgres  postgres                       [.] InstrStopNode                            
            |
            --- InstrStopNode

     0.02%  postgres  [kernel.kallsyms]              [k] run_posix_cpu_timers                     
            |
            --- run_posix_cpu_timers
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
               |          
               |--33.36%-- hash_search_with_hash_value
               |          
               |--33.33%-- ExecProject
               |          
                --33.31%-- HeapTupleSatisfiesMVCC

     0.02%  postgres  postgres                       [.] BufTableLookup                           
            |
            --- BufTableLookup

     0.02%  postgres  postgres                       [.] alloc_var                                
            |
            --- alloc_var

     0.02%  postgres  postgres                       [.] slot_getsomeattrs                        
            |
            --- slot_getsomeattrs

     0.02%  postgres  [kernel.kallsyms]              [k] native_read_tsc                          
            |
            --- native_read_tsc
               |          
               |--66.59%-- native_sched_clock
               |          sched_clock
               |          trace_clock_local
               |          rb_reserve_next_event
               |          ring_buffer_lock_reserve
               |          trace_buffer_lock_reserve
               |          trace_current_buffer_lock_reserve
               |          |          
               |          |--50.09%-- ftrace_raw_event_sched_stat_runtime
               |          |          update_curr
               |          |          enqueue_entity
               |          |          enqueue_task_fair
               |          |          enqueue_task
               |          |          activate_task
               |          |          try_to_wake_up
               |          |          wake_up_process
               |          |          update_queue
               |          |          sys_semtimedop
               |          |          sys_semop
               |          |          system_call
               |          |          __GI___semop
               |          |          
               |           --49.91%-- ftrace_raw_event_id_sched_stat_template
               |                     ftrace_raw_event_sched_stat_wait
               |                     update_stats_wait_end
               |                     set_next_entity
               |                     pick_next_task_fair
               |                     schedule
               |                     sys_semtimedop
               |                     sys_semop
               |                     system_call
               |                     __GI___semop
               |          
                --33.41%-- read_tsc
                          do_timer
                          tick_do_update_jiffies64
                          tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          HeapTupleSatisfiesMVCC

     0.02%  postgres  [kernel.kallsyms]              [k] try_to_wake_up                           
            |
            --- try_to_wake_up
                wake_up_process
               |          
               |--66.67%-- update_queue
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
                --33.33%-- hrtimer_wakeup
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          heap_getnext

     0.02%  postgres  [kernel.kallsyms]              [k] ftrace_raw_event_sched_stat_runtime      
            |
            --- ftrace_raw_event_sched_stat_runtime
                update_curr
               |          
               |--66.57%-- dequeue_entity
               |          dequeue_task_fair
               |          dequeue_task
               |          deactivate_task
               |          thread_return
               |          sys_semtimedop
               |          sys_semop
               |          system_call
               |          __GI___semop
               |          
                --33.43%-- task_tick_fair
                          scheduler_tick
                          update_process_times
                          tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          LWLockAcquire

     0.02%  postgres  [kernel.kallsyms]              [k] current_kernel_time                      
            |
            --- current_kernel_time
               |          
               |--66.63%-- audit_syscall_entry
               |          auditsys
               |          |          
               |          |--50.07%-- __GI___libc_read
               |          |          
               |           --49.93%-- __GI___libc_lseek64
               |          
                --33.37%-- auditsys
                          __GI___libc_lseek64

     0.02%  postgres  [kernel.kallsyms]              [k] path_put                                 
            |
            --- path_put
               |          
               |--66.63%-- sysret_audit
               |          |          
               |          |--50.02%-- __GI___libc_read
               |          |          
               |           --49.98%-- __GI___libc_lseek64
               |          
                --33.37%-- __audit_syscall_exit
                          sysret_audit
                          __GI___libc_read

     0.02%  postgres  postgres                       [.] LookupTupleHashEntry                     
            |
            --- LookupTupleHashEntry
               |          
               |--33.09%-- 0x1d4108000000000
                --66.91%-- [...]

     0.02%  postgres  [kernel.kallsyms]              [k] _cond_resched                            
            |
            --- _cond_resched
               |          
               |--66.76%-- ext4_llseek
               |          vfs_llseek
               |          sys_lseek
               |          system_call
               |          __GI___libc_lseek64
               |          
                --33.24%-- generic_file_aio_read
                          do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.02%  postgres  [kernel.kallsyms]              [k] scheduler_tick                           
            |
            --- scheduler_tick
               |          
               |--66.67%-- update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          |          
               |          |--50.29%-- varstr_cmp
               |          |          
               |           --49.71%-- hash_search_with_hash_value
               |          
                --33.33%-- tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          sys_semop
                          system_call
                          __GI___semop

     0.02%  postgres  [kernel.kallsyms]              [k] run_timer_softirq                        
            |
            --- run_timer_softirq
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
               |          
               |--33.40%-- vfs_llseek
               |          sys_lseek
               |          system_call
               |          __GI___libc_lseek64
               |          
               |--33.39%-- s_lock
               |          
                --33.22%-- varstr_cmp

     0.02%  postgres  [kernel.kallsyms]              [k] fsnotify                                 
            |
            --- fsnotify
               |          
               |--66.69%-- vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --33.31%-- sys_read
                          system_call
                          __GI___libc_read

     0.02%  postgres  [kernel.kallsyms]              [k] copy_user_generic                        
            |
            --- copy_user_generic
               |          
               |--66.49%-- file_read_actor
               |          generic_file_aio_read
               |          do_sync_read
               |          vfs_read
               |          sys_read
               |          system_call
               |          __GI___libc_read
               |          
                --33.51%-- generic_file_aio_read
                          do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.02%  postgres  [kernel.kallsyms]              [k] sys_semtimedop                           
            |
            --- sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.02%  postgres  [kernel.kallsyms]              [k] dput                                     
            |
            --- dput
                path_put
                __audit_syscall_exit
                sysret_audit
               |          
               |--50.52%-- __GI___semop
               |          
                --49.48%-- __GI___libc_lseek64

     0.02%  postgres  [kernel.kallsyms]              [k] perf_adjust_freq_unthr_context           
            |
            --- perf_adjust_freq_unthr_context
                perf_event_task_tick
                scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                StrategyGetBuffer

     0.02%  postgres  postgres                       [.] TupleHashTableMatch                      
            |
            --- TupleHashTableMatch

     0.02%  postgres  postgres                       [.] IsToastNamespace                         
            |
            --- IsToastNamespace

     0.02%  postgres  postgres                       [.] isTempToastNamespace                     
            |
            --- isTempToastNamespace

     0.02%  postgres  [kernel.kallsyms]              [k] ftrace_raw_event_id_softirq              
            |
            --- ftrace_raw_event_id_softirq
                ftrace_raw_event_softirq_raise
                raise_softirq
               |          
               |--50.01%-- run_local_timers
               |          update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          PinBuffer
               |          
                --49.99%-- rcu_check_callbacks
                          update_process_times
                          tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          heap_page_prune_opt

     0.02%  postgres  postgres                       [.] FunctionCall1Coll                        
            |
            --- FunctionCall1Coll

     0.02%  postgres  [kernel.kallsyms]              [k] timekeeping_update                       
            |
            --- timekeeping_update
                do_timer
                tick_do_update_jiffies64
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
               |          
               |--50.04%-- heapgetpage
               |          
                --49.96%-- ext4_llseek
                          vfs_llseek
                          sys_lseek
                          system_call
                          __GI___libc_lseek64

     0.02%  postgres  [kernel.kallsyms]              [k] ring_buffer_unlock_commit                
            |
            --- ring_buffer_unlock_commit
               |          
               |--50.05%-- ftrace_raw_event_id_softirq
               |          ftrace_raw_event_softirq_raise
               |          raise_softirq
               |          run_local_timers
               |          update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          FunctionCall1Coll
               |          
                --49.95%-- ftrace_raw_event_sched_stat_runtime
                          update_curr
                          enqueue_entity
                          enqueue_task_fair
                          enqueue_task
                          activate_task
                          try_to_wake_up
                          wake_up_process
                          update_queue
                          sys_semtimedop
                          sys_semop
                          system_call
                          __GI___semop

     0.02%  postgres  postgres                       [.] hashbpchar                               
            |
            --- hashbpchar

     0.02%  postgres  postgres                       [.] get_hash_value                           
            |
            --- get_hash_value

     0.02%  postgres  [kernel.kallsyms]              [k] native_sched_clock                       
            |
            --- native_sched_clock
                sched_clock
               |          
               |--50.04%-- sched_clock_cpu
               |          update_rq_clock
               |          scheduler_tick
               |          update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          heap_getnext
               |          
                --49.96%-- trace_clock_local
                          rb_reserve_next_event
                          ring_buffer_lock_reserve
                          trace_buffer_lock_reserve
                          trace_current_buffer_lock_reserve
                          ftrace_raw_event_id_softirq
                          ftrace_raw_event_softirq_exit
                          __do_softirq
                          call_softirq
                          do_softirq
                          irq_exit
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          slot_deform_tuple

     0.02%  postgres  [kernel.kallsyms]              [k] __rcu_pending                            
            |
            --- __rcu_pending
                rcu_check_callbacks
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
               |          
               |--50.14%-- StrategyGetBuffer
               |          
                --49.86%-- file_read_actor
                          generic_file_aio_read
                          do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.02%  postgres  [kernel.kallsyms]              [k] __do_softirq                             
            |
            --- __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
               |          
               |--50.10%-- varstr_cmp
               |          
                --49.90%-- file_read_actor
                          generic_file_aio_read
                          do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.02%  postgres  [kernel.kallsyms]              [k] rb_next                                  
            |
            --- rb_next
               |          
               |--50.10%-- __remove_hrtimer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          varstr_cmp
               |          
                --49.90%-- set_next_entity
                          pick_next_task_fair
                          schedule
                          sys_semtimedop
                          sys_semop
                          system_call
                          __GI___semop

     0.02%  postgres  postgres                       [.] ExecFunnel                               
            |
            --- ExecFunnel

     0.02%  postgres  [kernel.kallsyms]              [k] try_atomic_semop                         
            |
            --- try_atomic_semop
                update_queue
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.02%  postgres  postgres                       [.] MemoryContextResetOnly                   
            |
            --- MemoryContextResetOnly

     0.02%  postgres  postgres                       [.] IsCatalogRelation                        
            |
            --- IsCatalogRelation

     0.02%  postgres  postgres                       [.] pfree                                    
            |
            --- pfree

     0.02%  postgres  [kernel.kallsyms]              [k] ktime_get                                
            |
            --- ktime_get
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
               |          
               |--50.12%-- hash_search_with_hash_value
               |          
                --49.88%-- sys_semtimedop
                          sys_semop
                          system_call
                          __GI___semop

     0.02%  postgres  [kernel.kallsyms]              [k] account_process_tick                     
            |
            --- account_process_tick
               |          
               |--50.05%-- tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          ExecQual
               |          
                --49.95%-- update_process_times
                          tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          file_read_actor
                          generic_file_aio_read
                          do_sync_read
                          vfs_read
                          sys_read
                          system_call
                          __GI___libc_read

     0.02%  postgres  postgres                       [.] int8_numeric                             
            |
            --- int8_numeric

     0.02%  postgres  [kernel.kallsyms]              [k] ipcperms                                 
            |
            --- ipcperms
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.02%  postgres  [kernel.kallsyms]              [k] cpumask_next_and                         
            |
            --- cpumask_next_and
                find_busiest_group
                thread_return
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.02%  postgres  postgres                       [.] mdopen                                   
            |
            --- mdopen

     0.02%  postgres  postgres                       [.] SetLatch                                 
            |
            --- SetLatch

     0.02%  postgres  postgres                       [.] PinBuffer_Locked                         
            |
            --- PinBuffer_Locked

     0.02%  postgres  [kernel.kallsyms]              [k] cap_file_permission                      
            |
            --- cap_file_permission
                rw_verify_area
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.02%  postgres  postgres                       [.] RecoveryInProgress                       
            |
            --- RecoveryInProgress

     0.02%  postgres  [kernel.kallsyms]              [k] filter_current_check_discard             
            |
            --- filter_current_check_discard
               |          
               |--50.17%-- ftrace_raw_event_id_softirq
               |          ftrace_raw_event_softirq_raise
               |          raise_softirq
               |          run_local_timers
               |          update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          heap_getnext
               |          
                --49.83%-- ftrace_raw_event_sched_stat_runtime
                          update_curr
                          dequeue_entity
                          dequeue_task_fair
                          dequeue_task
                          deactivate_task
                          thread_return
                          sys_semtimedop
                          sys_semop
                          system_call
                          __GI___semop

     0.01%  postgres  postgres                       [.] base_yyparse                             
            |
            --- base_yyparse
                (nil)

     0.01%  postgres  postgres                       [.] pg_detoast_datum                         
            |
            --- pg_detoast_datum

     0.01%  postgres  [kernel.kallsyms]              [k] sched_clock                              
            |
            --- sched_clock
                rb_reserve_next_event
                ring_buffer_lock_reserve
                trace_buffer_lock_reserve
                trace_current_buffer_lock_reserve
                ftrace_raw_event_id_softirq
                ftrace_raw_event_softirq_raise
                raise_softirq
                run_local_timers
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                StrategyGetBuffer

     0.01%  postgres  [kernel.kallsyms]              [k] update_vsyscall                          
            |
            --- update_vsyscall
                timekeeping_update
                do_timer
                tick_do_update_jiffies64
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                StrategyGetBuffer

     0.01%  postgres  [kernel.kallsyms]              [k] update_rt_offset                         
            |
            --- update_rt_offset
                timekeeping_update
                do_timer
                tick_do_update_jiffies64
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                StrategyGetBuffer

     0.01%  postgres  [kernel.kallsyms]              [k] tick_dev_program_event                   
            |
            --- tick_dev_program_event
                tick_program_event
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                StrategyGetBuffer

     0.01%  postgres  postgres                       [.] heap_copytuple                           
            |
            --- heap_copytuple
                networkjoinsel

     0.01%  postgres  [kernel.kallsyms]              [k] dyntick_save_progress_counter            
            |
            --- dyntick_save_progress_counter
                rcu_process_dyntick
                force_quiescent_state
                __rcu_process_callbacks
                rcu_process_callbacks
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                varstr_cmp

     0.01%  postgres  postgres                       [.] free_var                                 
            |
            --- free_var

     0.01%  postgres  [kernel.kallsyms]              [k] scsi_finish_command                      
            |
            --- scsi_finish_command
                scsi_softirq_done
                blk_done_softirq
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_call_function_single_interrupt
                call_function_single_interrupt
                varstr_cmp

     0.01%  postgres  postgres                       [.] memcpy@plt                               
            |
            --- memcpy@plt
                networkjoinsel

     0.01%  postgres  [kernel.kallsyms]              [k] native_apic_mem_write                    
            |
            --- native_apic_mem_write
                smp_apic_timer_interrupt
                apic_timer_interrupt
                bcTruelen

     0.01%  postgres  postgres                       [.] ExecStoreVirtualTuple                    
            |
            --- ExecStoreVirtualTuple

     0.01%  postgres  postgres                       [.] hash_search                              
            |
            --- hash_search
                0x1d74de0

     0.01%  postgres  [kernel.kallsyms]              [k] unmap_vmas                               
            |
            --- unmap_vmas
                unmap_region
                do_munmap
                sys_munmap
                system_call
                __GI___munmap

     0.01%  postgres  [kernel.kallsyms]              [k] rebalance_domains                        
            |
            --- rebalance_domains
                run_rebalance_domains
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                slot_getattr

     0.01%  postgres  postgres                       [.] fetch_input_tuple                        
            |
            --- fetch_input_tuple

     0.01%  postgres  [kernel.kallsyms]              [k] update_cfs_load                          
            |
            --- update_cfs_load
                scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                slot_getattr

     0.01%  postgres  [kernel.kallsyms]              [k] tick_sched_timer                         
            |
            --- tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                slot_getattr

     0.01%  postgres  [kernel.kallsyms]              [k] __rcu_process_callbacks                  
            |
            --- __rcu_process_callbacks
                rcu_process_callbacks
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                bpcharle

     0.01%  postgres  [kernel.kallsyms]              [k] set_task_cpu                             
            |
            --- set_task_cpu
                try_to_wake_up
                wake_up_process
                hrtimer_wakeup
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                pg_detoast_datum_packed

     0.01%  postgres  postgres                       [.] tag_hash                                 
            |
            --- tag_hash

     0.01%  postgres  [kernel.kallsyms]              [k] task_waking_fair                         
            |
            --- task_waking_fair
                try_to_wake_up
                wake_up_process
                update_queue
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  postgres                       [.] FunctionCall2Coll                        
            |
            --- FunctionCall2Coll

     0.01%  postgres  [kernel.kallsyms]              [k] enqueue_entity                           
            |
            --- enqueue_entity
                enqueue_task_fair
                enqueue_task
                activate_task
                try_to_wake_up
                wake_up_process
                hrtimer_wakeup
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                hash_search_with_hash_value

     0.01%  postgres  [kernel.kallsyms]              [k] rcu_irq_enter                            
            |
            --- rcu_irq_enter
                irq_enter
                smp_apic_timer_interrupt
                apic_timer_interrupt
                file_read_actor
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.01%  postgres  [kernel.kallsyms]              [k] ftrace_raw_event_id_sched_wakeup_template
            |
            --- ftrace_raw_event_id_sched_wakeup_template
                ftrace_raw_event_sched_wakeup
                try_to_wake_up
                wake_up_process
                update_queue
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] irq_exit                                 
            |
            --- irq_exit
                apic_timer_interrupt
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.01%  postgres  [kernel.kallsyms]              [k] hrtimer_interrupt                        
            |
            --- hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                file_read_actor
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.01%  postgres  [kernel.kallsyms]              [k] ring_buffer_event_data                   
            |
            --- ring_buffer_event_data
                trace_current_buffer_lock_reserve
                ftrace_raw_event_sched_stat_runtime
                update_curr
                put_prev_task_fair
                schedule
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] __percpu_counter_add                     
            |
            --- __percpu_counter_add
                account_system_time
                account_process_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                file_read_actor
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.01%  postgres  [kernel.kallsyms]              [k] idr_find                                 
            |
            --- idr_find
                ipc_lock_check
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] pid_vnr                                  
            |
            --- pid_vnr
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] find_busiest_queue                       
            |
            --- find_busiest_queue
                thread_return
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] tracing_generic_entry_update             
            |
            --- tracing_generic_entry_update
                trace_buffer_lock_reserve
                trace_current_buffer_lock_reserve
                ftrace_raw_event_sched_stat_runtime
                update_curr
                put_prev_task_fair
                schedule
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] find_next_bit                            
            |
            --- find_next_bit
                find_busiest_group
                thread_return
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] perf_event_task_tick                     
            |
            --- perf_event_task_tick
                scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                heap_getnext

     0.01%  postgres  [kernel.kallsyms]              [k] resched_task                             
            |
            --- resched_task
                check_preempt_curr
                try_to_wake_up
                wake_up_process
                update_queue
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] update_queue                             
            |
            --- update_queue
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] schedule                                 
            |
            --- schedule
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  postgres                       [.] DataChecksumsEnabled                     
            |
            --- DataChecksumsEnabled

     0.01%  postgres  [kernel.kallsyms]              [k] enqueue_task_fair                        
            |
            --- enqueue_task_fair
                enqueue_task
                activate_task
                try_to_wake_up
                wake_up_process
                update_queue
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] sysret_careful                           
            |
            --- sysret_careful
                __GI___libc_lseek64

     0.01%  postgres  [kernel.kallsyms]              [k] update_process_times                     
            |
            --- update_process_times
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                file_read_actor
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.01%  postgres  postgres                       [.] memcmp@plt                               
            |
            --- memcmp@plt

     0.01%  postgres  [kernel.kallsyms]              [k] smp_apic_timer_interrupt                 
            |
            --- smp_apic_timer_interrupt
                apic_timer_interrupt
                file_read_actor
                generic_file_aio_read
                do_sync_read
                vfs_read
                sys_read
                system_call
                __GI___libc_read

     0.01%  postgres  [kernel.kallsyms]              [k] raise_softirq                            
            |
            --- raise_softirq
                scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                HeapTupleSatisfiesMVCC

     0.01%  postgres  postgres                       [.] strip_var                                
            |
            --- strip_var

     0.01%  postgres  [kernel.kallsyms]              [k] update_rq_clock                          
            |
            --- update_rq_clock
                enqueue_task
                activate_task
                try_to_wake_up
                wake_up_process
                update_queue
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  postgres                       [.] BufTableDelete                           
            |
            --- BufTableDelete

     0.01%  postgres  [kernel.kallsyms]              [k] perf_pmu_enable                          
            |
            --- perf_pmu_enable
                perf_event_task_tick
                scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                mutex_lock
                ext4_llseek
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.01%  postgres  libc-2.12.so                   [.] __strncpy_ssse3                          
            |
            --- __strncpy_ssse3

     0.01%  postgres  postgres                       [.] LWLockQueueSelf                          
            |
            --- LWLockQueueSelf

     0.01%  postgres  [kernel.kallsyms]              [k] ipc_lock                                 
            |
            --- ipc_lock
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] account_cfs_rq_runtime                   
            |
            --- account_cfs_rq_runtime
                update_curr
                put_prev_task_fair
                schedule
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] update_cpu_load                          
            |
            --- update_cpu_load
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                slot_deform_tuple

     0.01%  postgres  [kernel.kallsyms]              [k] rb_erase                                 
            |
            --- rb_erase
                __dequeue_entity
                set_next_entity
                pick_next_task_fair
                schedule
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] _spin_lock_irqsave                       
            |
            --- _spin_lock_irqsave
                ntp_tick_length
                do_timer
                tick_do_update_jiffies64
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.01%  postgres  [kernel.kallsyms]              [k] sys_semop                                
            |
            --- sys_semop
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] rcu_check_callbacks                      
            |
            --- rcu_check_callbacks
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                slot_getattr

     0.01%  postgres  [kernel.kallsyms]              [k] trace_buffer_lock_reserve                
            |
            --- trace_buffer_lock_reserve
                trace_current_buffer_lock_reserve
                ftrace_raw_event_id_softirq
                ftrace_raw_event_softirq_raise
                raise_softirq
                run_local_timers
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                slot_deform_tuple

     0.01%  postgres  [kernel.kallsyms]              [k] thread_return                            
            |
            --- thread_return
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.01%  postgres  [kernel.kallsyms]              [k] task_tick_fair                           
            |
            --- task_tick_fair
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                slot_deform_tuple

     0.01%  postgres  [kernel.kallsyms]              [k] __rb_reserve_next                        
            |
            --- __rb_reserve_next
                rb_reserve_next_event
                ring_buffer_lock_reserve
                trace_buffer_lock_reserve
                trace_current_buffer_lock_reserve
                ftrace_raw_event_sched_stat_runtime
                update_curr
                task_tick_fair
                scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                mutex_lock
                ext4_llseek
                vfs_llseek
                sys_lseek
                system_call
                __GI___libc_lseek64

     0.01%  postgres  [kernel.kallsyms]              [k] auditsys                                 
            |
            --- auditsys
                __GI___libc_lseek64

     0.01%  postgres  postgres                       [.] smgrread                                 
            |
            --- smgrread

     0.01%  postgres  [kernel.kallsyms]              [k] dequeue_task                             
            |
            --- dequeue_task
                deactivate_task
                thread_return
                sys_semtimedop
                sys_semop
                system_call
                __GI___semop

     0.00%  postgres  [kernel.kallsyms]              [k] unix_poll                                
            |
            --- unix_poll
                sock_poll
                do_sys_poll
                sys_poll
                system_call
                __poll
                0x72c4479b242c

     0.00%  postgres  [kernel.kallsyms]              [k] perf_pmu_rotate_start                    
            |
            --- perf_pmu_rotate_start
                perf_event_context_sched_in
                __perf_event_task_sched_in
                finish_task_switch
                thread_return
                schedule_hrtimeout_range
                poll_schedule_timeout
                do_sys_poll
                sys_poll
                system_call
                __poll
                0x72c4479b242c



#
# (For a higher level overview, try: perf report --sort comm,dso)
#
