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perf report: Document +field style argument support for --field option 

Commit 2f3f9bcf00 ("perf tools: Add +field argument support for
--field option") by Jiri Olsa <jolsa@kernel.org> introduced +field style
argument support for --field option.

This is useful but not updated documentation.  This add a little
description there.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170313083252.23644-1-changbin.du@intel.com
[ Slightly improved the phrase structure ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Changbin Du 2017-03-13 16:32:52 +08:00 committed by Arnaldo Carvalho de Melo
parent 4b0b3aa6a2
commit d35fa1e75f
1 changed files with 3 additions and 0 deletions
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tools/perf/Documentation/perf-report.txt
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@ -173,6 +173,9 @@ OPTIONS
By default, every sort keys not specified in -F will be appended
automatically.
If the keys starts with a prefix '+', then it will append the specified
field(s) to the default field order. For example: perf report -F +period,sample.
-p::
--parent=<regex>::
A regex filter to identify parent. The parent is a caller of this