Intel(R) Memory Latency Checker - v3.12 *** Unable to modify prefetchers (try executing 'modprobe msr') *** So, enabling random access for latency measurements Measuring idle latencies for random access (in ns)... Numa node Numa node 0 1 2 3 0 107.3 116.8 207.3 207.0 1 120.5 110.6 207.5 207.1 2 207.0 207.2 107.8 116.8 3 204.4 204.7 117.7 107.9 Measuring Peak Injection Memory Bandwidths for the system Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec) Using all the threads from each core if Hyper-threading is enabled Using traffic with the following read-write ratios ALL Reads : 637545.8 3:1 Reads-Writes : 577715.7 2:1 Reads-Writes : 486147.5 1:1 Reads-Writes : 429828.1 Stream-triad like: 588366.2 All NT writes : 505637.7 1:1 Read-NT write: 450882.6 Measuring Memory Bandwidths between nodes within system Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec) Using all the threads from each core if Hyper-threading is enabled Using Read-only traffic type Numa node Numa node 0 1 2 3 0 211504.2 203084.9 91915.5 92326.9 1 202149.1 260100.9 91868.6 92133.3 2 91912.9 112167.5 211826.4 202075.9 3 92147.2 112663.6 202427.9 211755.0 Measuring Loaded Latencies for the system Using all the threads from each core if Hyper-threading is enabled Using Read-only traffic type Inject Latency Bandwidth Delay (ns) MB/sec ========================== 00000 632.81 846408.6 00002 631.00 846629.6 00008 632.98 845822.7 00015 640.31 845685.8 00050 662.04 839876.2 00100 659.75 821062.7 00200 160.90 791997.3 00300 123.19 539324.2 00400 120.81 389993.4 00500 118.85 315980.0 00700 117.53 228791.5 01000 116.66 161892.1 01300 115.78 125314.0 01700 110.37 96388.6 02500 108.80 66030.3 03500 108.52 47464.2 05000 108.29 33474.1 09000 107.96 18904.4 20000 107.76 8844.2 Measuring cache-to-cache transfer latency (in ns)... Local Socket L2->L2 HIT latency 27.5 Local Socket L2->L2 HITM latency 27.6 Remote Socket L2->L2 HITM latency (data address homed in writer socket) Reader Numa Node Writer Numa Node 0 1 2 3 0 - 125.8 213.3 211.7 1 125.7 - 213.6 212.2 2 214.7 212.3 - 124.6 3 214.3 212.4 124.7 - Remote Socket L2->L2 HITM latency (data address homed in reader socket) Reader Numa Node Writer Numa Node 0 1 2 3 0 - 125.8 217.8 216.8 1 125.8 - 214.5 213.1 2 219.1 217.2 - 124.7 3 216.8 215.0 124.7 -