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perf report: Document '--call-graph' for optional print_limit argument

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The '--call-graph' command line option can receive undocumented optional
print_limit argument. Besides, use strtoul() to parse the option since
its type is u32.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1323703017-6060-2-git-send-email-namhyung@gmail.com
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2011-12-13 00:16:50 +09:00
committed by Arnaldo Carvalho de Melo
parent f3bda2c9a6
commit 6581f6e35f
2 changed files with 6 additions and 5 deletions
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5
tools/perf/Documentation/perf-report.txt
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@@ -80,9 +80,10 @@ OPTIONS
--dump-raw-trace::
Dump raw trace in ASCII.
-g [type,min,order]::
-g [type,min[,limit],order]::
--call-graph::
Display call chains using type, min percent threshold and order.
Display call chains using type, min percent threshold, optional print
limit and order.
type can be either:
- flat: single column, linear exposure of call chains.
- graph: use a graph tree, displaying absolute overhead rates.