# ========
# captured on: Tue Sep 22 15:33:53 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 93618 
# 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 = { 26 }
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# ========
#
# Samples: 7K of event 'cycles'
# Event count (approx.): 5329876238
#
# Overhead   Command                  Shared Object                               Symbol
# ........  ........  .............................  ...................................
#
    17.32%  postgres  postgres                       [.] HeapTupleSatisfiesMVCC         
            |
            --- HeapTupleSatisfiesMVCC

    12.25%  postgres  postgres                       [.] bcTruelen                      
            |
            --- bcTruelen

     8.42%  postgres  postgres                       [.] varstr_cmp                     
            |
            --- varstr_cmp

     5.80%  postgres  postgres                       [.] slot_deform_tuple              
            |
            --- slot_deform_tuple

     5.55%  postgres  postgres                       [.] hash_search_with_hash_value    
            |
            --- hash_search_with_hash_value
               |          
               |--0.24%-- 0xd7fc3000000000
                --99.76%-- [...]

     4.52%  postgres  postgres                       [.] heap_page_prune_opt            
            |
            --- heap_page_prune_opt

     4.29%  postgres  postgres                       [.] heap_getnext                   
            |
            --- heap_getnext

     4.21%  postgres  postgres                       [.] ExecMakeFunctionResultNoSets   
            |
            --- ExecMakeFunctionResultNoSets

     3.33%  postgres  postgres                       [.] PinBuffer                      
            |
            --- PinBuffer

     3.03%  postgres  postgres                       [.] slot_getattr                   
            |
            --- slot_getattr

     2.60%  postgres  postgres                       [.] bpcharle                       
            |
            --- bpcharle

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

     2.41%  postgres  postgres                       [.] heap_parallelscan_nextpage     
            |
            --- heap_parallelscan_nextpage

     2.20%  postgres  postgres                       [.] ExecScan                       
            |
            --- ExecScan

     1.41%  postgres  postgres                       [.] heapgetpage                    
            |
            --- heapgetpage

     1.39%  postgres  postgres                       [.] ExecQual                       
            |
            --- ExecQual

     1.18%  postgres  postgres                       [.] ExecEvalScalarVarFast          
            |
            --- ExecEvalScalarVarFast

     1.07%  postgres  postgres                       [.] ExecStoreTuple                 
            |
            --- ExecStoreTuple

     0.99%  postgres  postgres                       [.] UnpinBuffer.clone.0            
            |
            --- UnpinBuffer.clone.0

     0.93%  postgres  postgres                       [.] ExecEvalConst                  
            |
            --- ExecEvalConst

     0.80%  postgres  postgres                       [.] PartialSeqNext                 
            |
            --- PartialSeqNext

     0.76%  postgres  libc-2.12.so                   [.] memcpy                         
            |
            --- memcpy
               |          
               |--92.87%-- networkjoinsel
                --7.13%-- [...]

     0.73%  postgres  postgres                       [.] check_stack_depth              
            |
            --- check_stack_depth

     0.73%  postgres  postgres                       [.] LWLockRelease                  
            |
            --- LWLockRelease

     0.69%  postgres  postgres                       [.] pg_detoast_datum_packed        
            |
            --- pg_detoast_datum_packed

     0.53%  postgres  postgres                       [.] hash_any                       
            |
            --- hash_any

     0.51%  postgres  postgres                       [.] shm_mq_receive                 
            |
            --- shm_mq_receive

     0.49%  postgres  postgres                       [.] CheckForSerializableConflictOut
            |
            --- CheckForSerializableConflictOut

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

     0.46%  postgres  postgres                       [.] pgstat_end_function_usage      
            |
            --- pgstat_end_function_usage
               |          
               |--2.94%-- 0x36a1d00497ac1
               |          
               |--2.94%-- 0x15bd600497ac1
               |          
               |--2.94%-- 0x2379f700497ac1
               |          
               |--2.94%-- 0x8d49300497ac1
               |          
               |--2.94%-- 0x20c56100497ac1
               |          
               |--2.94%-- 0x12baa000497ac1
               |          
               |--2.94%-- 0x1b7f9000497ac1
               |          
               |--2.94%-- 0xb12b00497ac1
               |          
               |--2.94%-- 0x8d34600497ac1
               |          
               |--2.94%-- 0x1fe72500497ac1
               |          
               |--2.94%-- 0x10b79f00497ac1
               |          
               |--2.94%-- 0x1ce9c400497ac1
               |          
               |--2.94%-- 0x1b286a00497ac1
               |          
               |--2.94%-- 0x195b8f00497ac1
                --58.82%-- [...]

     0.46%  postgres  postgres                       [.] pgstat_init_function_usage     
            |
            --- pgstat_init_function_usage

     0.42%  postgres  postgres                       [.] LockBuffer                     
            |
            --- LockBuffer

     0.40%  postgres  postgres                       [.] XidInMVCCSnapshot              
            |
            --- XidInMVCCSnapshot

     0.39%  postgres  postgres                       [.] bpchareq                       
            |
            --- bpchareq

     0.38%  postgres  postgres                       [.] lc_collate_is_c                
            |
            --- lc_collate_is_c

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

     0.30%  postgres  postgres                       [.] s_lock                         
            |
            --- s_lock

     0.30%  postgres  [vdso]                         [.] 0x00007fff2dfff8d4             
            |          
            |--22.73%-- 0x7fff2dfff8d4
            |          __gettimeofday
            |          
            |--18.18%-- 0x7fff2dfff814
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
            |--13.63%-- 0x7fff2dfff830
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
            |--4.55%-- 0x7fff2dfff803
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
            |--4.55%-- 0x7fff2dfff890
            |          
            |--4.55%-- 0x7fff2dfff7d7
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
            |--4.55%-- 0x7fff2dfff8df
            |          __gettimeofday
            |          
            |--4.55%-- 0x7fff2dfff8d8
            |          __gettimeofday
            |          
            |--4.55%-- 0x7fff2dfff82a
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
            |--4.55%-- 0x7fff2dfff7fc
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
            |--4.54%-- 0x7fff2dfff81f
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
            |--4.54%-- 0x7fff2dfff7e4
            |          0x7fff2dfff8bc
            |          __gettimeofday
            |          
             --4.54%-- 0x7fff2dfff8b0
                       __gettimeofday

     0.27%  postgres  [kernel.kallsyms].vsyscall_fn  [.] vread_tsc                      
            |
            --- vread_tsc
               |          
               |--75.00%-- 0x7fff2dfff814
               |          0x7fff2dfff8bc
               |          __gettimeofday
               |          
                --25.00%-- 0x7fff2dfff8bc
                          __gettimeofday

     0.27%  postgres  postgres                       [.] ReadBuffer_common              
            |
            --- ReadBuffer_common

     0.26%  postgres  postgres                       [.] AllocSetAlloc                  
            |
            --- AllocSetAlloc
               |          
               |--31.58%-- networkjoinsel
                --68.42%-- [...]

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

     0.23%  postgres  postgres                       [.] TransactionIdPrecedes          
            |
            --- TransactionIdPrecedes

     0.22%  postgres  postgres                       [.] ExecProject                    
            |
            --- ExecProject

     0.22%  postgres  postgres                       [.] advance_aggregates             
            |
            --- advance_aggregates

     0.16%  postgres  postgres                       [.] make_result                    
            |
            --- make_result

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

     0.14%  postgres  postgres                       [.] int64_to_numericvar            
            |
            --- int64_to_numericvar

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

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

     0.14%  postgres  postgres                       [.] do_numeric_accum               
            |
            --- do_numeric_accum
                (nil)

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

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

     0.09%  postgres  postgres                       [.] ResourceOwnerRememberBuffer    
            |
            --- ResourceOwnerRememberBuffer

     0.09%  postgres  postgres                       [.] AllocSetFree                   
            |
            --- AllocSetFree

     0.09%  postgres  postgres                       [.] shm_mq_inc_bytes_read          
            |
            --- shm_mq_inc_bytes_read

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

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

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

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

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

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

     0.07%  postgres  postgres                       [.] init_var_from_num              
            |
            --- init_var_from_num
               |          
               |--59.99%-- 0x0
               |          
                --40.01%-- slot_getsomeattrs

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

     0.05%  postgres  postgres                       [.] int4_sum                       
            |
            --- int4_sum

     0.05%  postgres  postgres                       [.] FunctionCall1Coll              
            |
            --- FunctionCall1Coll

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

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

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

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

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

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

     0.05%  postgres  postgres                       [.] LookupTupleHashEntry           
            |
            --- LookupTupleHashEntry
                0xd7fc3000000000

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

     0.04%  postgres  [kernel.kallsyms]              [k] native_write_msr_safe          
            |
            --- native_write_msr_safe
               |          
               |--98.53%-- 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%-- slot_getattr
               |          |          
               |          |--33.33%-- ExecEvalConst
               |          |          
               |           --33.32%-- heap_getnext
               |          
               |--1.39%-- x86_pmu_enable
               |          perf_pmu_enable
               |          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
               |          0x4cf570b62e62
                --0.08%-- [...]

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

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

     0.04%  postgres  postgres                       [.] FunctionCall2Coll              
            |
            --- FunctionCall2Coll

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

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

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

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

     0.04%  postgres  postgres                       [.] int8_numeric                   
            |
            --- int8_numeric

     0.04%  postgres  [kernel.kallsyms]              [k] _spin_lock_irqsave             
            |
            --- _spin_lock_irqsave
               |          
               |--66.67%-- __rcu_process_callbacks
               |          rcu_process_callbacks
               |          __do_softirq
               |          call_softirq
               |          do_softirq
               |          irq_exit
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          |          
               |          |--50.02%-- varstr_cmp
               |          |          
               |           --49.98%-- HeapTupleSatisfiesMVCC
               |          
                --33.33%-- ntp_tick_length
                          do_timer
                          tick_do_update_jiffies64
                          tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          HeapTupleSatisfiesMVCC

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

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

     0.03%  postgres  libc-2.12.so                   [.] __gettimeofday                 
            |
            --- __gettimeofday

     0.03%  postgres  postgres                       [.] hash_search                    
            |
            --- hash_search
               |          
               |--50.00%-- 0xdb2510
               |          
                --50.00%-- 0xd83710

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

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

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

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

     0.03%  postgres  [kernel.kallsyms]              [k] _spin_lock                     
            |
            --- _spin_lock
               |          
               |--50.00%-- scheduler_tick
               |          update_process_times
               |          tick_sched_timer
               |          __run_hrtimer
               |          hrtimer_interrupt
               |          smp_apic_timer_interrupt
               |          apic_timer_interrupt
               |          check_stack_depth
               |          
                --50.00%-- update_vsyscall
                          timekeeping_update
                          do_timer
                          tick_do_update_jiffies64
                          tick_sched_timer
                          __run_hrtimer
                          hrtimer_interrupt
                          smp_apic_timer_interrupt
                          apic_timer_interrupt
                          ExecScan

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

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

     0.03%  postgres  [kernel.kallsyms]              [k] scheduler_tick                 
            |
            --- scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
               |          
               |--50.02%-- slot_getattr
               |          
                --49.98%-- varstr_cmp

     0.03%  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
                varstr_cmp

     0.03%  postgres  [kernel.kallsyms]              [k] update_curr                    
            |
            --- update_curr
                task_tick_fair
                scheduler_tick
                update_process_times
                tick_sched_timer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                HeapTupleSatisfiesMVCC

     0.01%  postgres  [kernel.kallsyms]              [k] inet_csk_search_req            
            |
            --- inet_csk_search_req
                tcp_v4_do_rcv
                tcp_v4_rcv
                ip_local_deliver_finish
                ip_local_deliver
                ip_rcv_finish
                ip_rcv
                __netif_receive_skb
                process_backlog
                net_rx_action
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                do_IRQ
                ret_from_intr
                bpcharle

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

     0.01%  postgres  [kernel.kallsyms]              [k] trace_clock_local              
            |
            --- 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_entry
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                bcTruelen

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

     0.01%  postgres  [kernel.kallsyms]              [k] account_entity_enqueue         
            |
            --- account_entity_enqueue
                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
                heap_page_prune_opt

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

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

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

     0.01%  postgres  [kernel.kallsyms]              [k] apic_timer_interrupt           
            |
            --- apic_timer_interrupt
                PartialSeqNext

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

     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_id_softirq
                ftrace_raw_event_softirq_exit
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                hash_search_with_hash_value

     0.01%  postgres  [kernel.kallsyms]              [k] call_softirq                   
            |
            --- call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                hash_search_with_hash_value

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

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

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

     0.01%  postgres  [kernel.kallsyms]              [k] ftrace_raw_event_id_softirq    
            |
            --- ftrace_raw_event_id_softirq
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                CheckForSerializableConflictOut

     0.01%  postgres  [kernel.kallsyms]              [k] trace_recursive_unlock         
            |
            --- trace_recursive_unlock
                trace_nowake_buffer_unlock_commit
                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
                PinBuffer

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

     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
                PinBuffer

     0.01%  postgres  [kernel.kallsyms]              [k] irq_exit                       
            |
            --- irq_exit
                smp_apic_timer_interrupt
                apic_timer_interrupt
                HeapTupleSatisfiesMVCC

     0.01%  postgres  [kernel.kallsyms]              [k] ring_buffer_unlock_commit      
            |
            --- ring_buffer_unlock_commit
                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
                bcTruelen

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

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

     0.01%  postgres  [kernel.kallsyms]              [k] ftrace_trace_stack             
            |
            --- ftrace_trace_stack
                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
                HeapTupleSatisfiesMVCC

     0.01%  postgres  [kernel.kallsyms]              [k] __netif_receive_skb            
            |
            --- __netif_receive_skb
                netif_receive_skb
                napi_skb_finish
                napi_gro_receive
                ixgbe_poll
                net_rx_action
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                do_IRQ
                ret_from_intr
                LockBuffer

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

     0.01%  postgres  [kernel.kallsyms]              [k] enqueue_hrtimer                
            |
            --- enqueue_hrtimer
                __run_hrtimer
                hrtimer_interrupt
                smp_apic_timer_interrupt
                apic_timer_interrupt
                ExecScan

     0.01%  postgres  [kernel.kallsyms]              [k] dma_issue_pending_all          
            |
            --- dma_issue_pending_all
                net_rx_action
                __do_softirq
                call_softirq
                do_softirq
                irq_exit
                do_IRQ
                ret_from_intr
                bcTruelen

     0.01%  postgres  [kernel.kallsyms]              [k] native_read_tsc                
            |
            --- native_read_tsc
                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
                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

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



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