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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: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang 2015-07-08 04:44:54 -04:00 committed by Arnaldo Carvalho de Melo
parent 60cd37eb10
commit 3d5d68aabf
1 changed files with 8 additions and 0 deletions
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8
tools/perf/Documentation/perf-record.txt
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@ -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