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b0d745b3c3
Adding --ldlat option to specify desired latency for loads event. Specify 50 as loads event latency: $ perf mem record -e ldlat-loads -v --ldlat 50 true calling: record -W -d -e cpu/mem-loads,ldlat=50/P true Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1465928361-2442-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
64 lines
1.6 KiB
Text
64 lines
1.6 KiB
Text
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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-t::
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--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::
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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-list::
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Restrict dump of raw samples to those provided via this option. Note that the same
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option can be passed in record mode. It will be interpreted the same way as perf
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record.
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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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--ldload::
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Specify desired latency for loads event.
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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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