| 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. | |
| -p:: | |
| --phys-data:: | |
| Record/Report sample physical addresses | |
| SEE ALSO | |
| -------- | |
| linkperf:perf-record[1], linkperf:perf-report[1] |