| perf-mem.txt (9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e) | perf-mem.txt (a93c83eca48a4ffb8e57cb0c7cc2e3935744d2c6) |
|---|---|
| 1perf-mem(1) 2=========== 3 4NAME 5---- 6perf-mem - Profile memory accesses 7 8SYNOPSIS --- 7 unchanged lines hidden (view full) --- 16from it, into perf.data. Perf record options are accepted and are passed through. 17 18"perf mem report" displays the result. It invokes perf report with the 19right set of options to display a memory access profile. By default, loads 20and stores are sampled. Use the -t option to limit to loads or stores. 21 22Note that on Intel systems the memory latency reported is the use-latency, 23not the pure load (or store latency). Use latency includes any pipeline | 1perf-mem(1) 2=========== 3 4NAME 5---- 6perf-mem - Profile memory accesses 7 8SYNOPSIS --- 7 unchanged lines hidden (view full) --- 16from it, into perf.data. Perf record options are accepted and are passed through. 17 18"perf mem report" displays the result. It invokes perf report with the 19right set of options to display a memory access profile. By default, loads 20and stores are sampled. Use the -t option to limit to loads or stores. 21 22Note that on Intel systems the memory latency reported is the use-latency, 23not the pure load (or store latency). Use latency includes any pipeline |
| 24queueing delays in addition to the memory subsystem latency. | 24queuing delays in addition to the memory subsystem latency. |
| 25 26On Arm64 this uses SPE to sample load and store operations, therefore hardware 27and kernel support is required. See linkperf:perf-arm-spe[1] for a setup guide. 28Due to the statistical nature of SPE sampling, not every memory operation will 29be sampled. 30 31OPTIONS 32------- --- 69 unchanged lines hidden --- | 25 26On Arm64 this uses SPE to sample load and store operations, therefore hardware 27and kernel support is required. See linkperf:perf-arm-spe[1] for a setup guide. 28Due to the statistical nature of SPE sampling, not every memory operation will 29be sampled. 30 31OPTIONS 32------- --- 69 unchanged lines hidden --- |