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perf record: Improve documentation of event parameters
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- Some editing (params -> parameters)
- Point to the now more complete list of parameters in the perf list
manpage.

Signed-off-by: Andi Kleen <[email protected]>
Cc: Jiri Olsa <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Andi Kleen authored and acmel committed Oct 24, 2016
1 parent 0c2aff4 commit 84ee74a
Showing 1 changed file with 6 additions and 3 deletions.
9 changes: 6 additions & 3 deletions tools/perf/Documentation/perf-record.txt
Original file line number Diff line number Diff line change
Expand Up @@ -45,9 +45,9 @@ OPTIONS
param1 and param2 are defined as formats for the PMU in:
/sys/bus/event_source/devices/<pmu>/format/*

There are also some params which are not defined in .../<pmu>/format/*.
There are also some parameters which are not defined in .../<pmu>/format/*.
These params can be used to overload default config values per event.
Here is a list of the params.
Here are some common parameters:
- 'period': Set event sampling period
- 'freq': Set event sampling frequency
- 'time': Disable/enable time stamping. Acceptable values are 1 for
Expand All @@ -57,8 +57,11 @@ OPTIONS
FP mode, "dwarf" for DWARF mode, "lbr" for LBR mode and
"no" for disable callgraph.
- 'stack-size': user stack size for dwarf mode

See the linkperf:perf-list[1] man page for more parameters.

Note: If user explicitly sets options which conflict with the params,
the value set by the params will be overridden.
the value set by the parameters will be overridden.

Also not defined in .../<pmu>/format/* are PMU driver specific
configuration parameters. Any configuration parameter preceded by
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