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95 lines
2.2 KiB
95 lines
2.2 KiB
perf-mem(1) |
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=========== |
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NAME |
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---- |
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perf-mem - Profile memory accesses |
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SYNOPSIS |
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-------- |
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[verse] |
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'perf mem' [<options>] (record [<command>] | report) |
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DESCRIPTION |
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----------- |
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"perf mem record" runs a command and gathers memory operation data |
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from it, into perf.data. Perf record options are accepted and are passed through. |
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"perf mem report" displays the result. It invokes perf report with the |
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right set of options to display a memory access profile. By default, loads |
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and stores are sampled. Use the -t option to limit to loads or stores. |
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Note that on Intel systems the memory latency reported is the use-latency, |
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not the pure load (or store latency). Use latency includes any pipeline |
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queueing delays in addition to the memory subsystem latency. |
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OPTIONS |
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------- |
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<command>...:: |
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Any command you can specify in a shell. |
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-i:: |
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--input=<file>:: |
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Input file name. |
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-f:: |
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--force:: |
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Don't do ownership validation |
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-t:: |
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--type=<type>:: |
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Select the memory operation type: load or store (default: load,store) |
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-D:: |
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--dump-raw-samples:: |
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Dump the raw decoded samples on the screen in a format that is easy to parse with |
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one sample per line. |
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-x:: |
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--field-separator=<separator>:: |
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Specify the field separator used when dump raw samples (-D option). By default, |
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The separator is the space character. |
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-C:: |
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--cpu=<cpu>:: |
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Monitor only on the list of CPUs provided. Multiple CPUs can be provided as a |
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comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. Default |
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is to monitor all CPUS. |
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-U:: |
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--hide-unresolved:: |
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Only display entries resolved to a symbol. |
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-p:: |
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--phys-data:: |
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Record/Report sample physical addresses |
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--data-page-size:: |
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Record/Report sample data address page size |
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RECORD OPTIONS |
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-------------- |
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-e:: |
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--event <event>:: |
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Event selector. Use 'perf mem record -e list' to list available events. |
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-K:: |
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--all-kernel:: |
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Configure all used events to run in kernel space. |
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-U:: |
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--all-user:: |
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Configure all used events to run in user space. |
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-v:: |
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--verbose:: |
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Be more verbose (show counter open errors, etc) |
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--ldlat <n>:: |
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Specify desired latency for loads event. (x86 only) |
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In addition, for report all perf report options are valid, and for record |
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all perf record options. |
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SEE ALSO |
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-------- |
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linkperf:perf-record[1], linkperf:perf-report[1]
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