| perf-mem(1) |
| =========== |
| |
| NAME |
| ---- |
| perf-mem - Profile memory accesses |
| |
| SYNOPSIS |
| -------- |
| [verse] |
| 'perf mem' [<options>] (record [<command>] | report) |
| |
| DESCRIPTION |
| ----------- |
| "perf mem record" runs a command and gathers memory operation data |
| from it, into perf.data. Perf record options are accepted and are passed through. |
| |
| "perf mem report" displays the result. It invokes perf report with the |
| right set of options to display a memory access profile. By default, loads |
| and stores are sampled. Use the -t option to limit to loads or stores. |
| |
| Note that on Intel systems the memory latency reported is the use-latency, |
| not the pure load (or store latency). Use latency includes any pipeline |
| queueing delays in addition to the memory subsystem latency. |
| |
| OPTIONS |
| ------- |
| <command>...:: |
| Any command you can specify in a shell. |
| |
| -t:: |
| --type=:: |
| Select the memory operation type: load or store (default: load,store) |
| |
| -D:: |
| --dump-raw-samples=:: |
| Dump the raw decoded samples on the screen in a format that is easy to parse with |
| one sample per line. |
| |
| -x:: |
| --field-separator:: |
| Specify the field separator used when dump raw samples (-D option). By default, |
| The separator is the space character. |
| |
| -C:: |
| --cpu-list:: |
| Restrict dump of raw samples to those provided via this option. Note that the same |
| option can be passed in record mode. It will be interpreted the same way as perf |
| record. |
| |
| -K:: |
| --all-kernel:: |
| Configure all used events to run in kernel space. |
| |
| -U:: |
| --all-user:: |
| Configure all used events to run in user space. |
| |
| --ldload:: |
| Specify desired latency for loads event. |
| |
| SEE ALSO |
| -------- |
| linkperf:perf-record[1], linkperf:perf-report[1] |
