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Commit 3d5d68aa authored by Kan Liang's avatar Kan Liang Committed by Arnaldo Carvalho de Melo
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perf record: Document setting '-e pmu/period=N/' in man page 



The 'period' param is not defined in
/sys/bus/event_sources/devices/<pmu>/format/*, but can be used, document
it.

Signed-off-by: default avatarKan Liang <kan.liang@intel.com>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1436345097-11113-3-git-send-email-kan.liang@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 60cd37eb

tools/perf/Documentation/perf-record.txt

+8 −0
Original line number Original line Diff line number Diff line
@@ -45,6 +45,14 @@ OPTIONS 
          param1 and param2 are defined as formats for the PMU in:

          param1 and param2 are defined as formats for the PMU in:

          /sys/bus/event_sources/devices/<pmu>/format/*

          /sys/bus/event_sources/devices/<pmu>/format/*





	  There are also some params which are not defined in .../<pmu>/format/*.

	  These params can be used to set event defaults.

	  Here is a list of the params.

	  - 'period': Set event sampling period



	  Note: If user explicitly sets options which conflict with the params,

	  the value set by the params will be overridden.



        - a hardware breakpoint event in the form of '\mem:addr[/len][:access]'

        - a hardware breakpoint event in the form of '\mem:addr[/len][:access]'

          where addr is the address in memory you want to break in.

          where addr is the address in memory you want to break in.

          Access is the memory access type (read, write, execute) it can

          Access is the memory access type (read, write, execute) it can