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authorArnaldo Carvalho de Melo <acme@redhat.com>2016-04-14 18:15:18 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-04-14 19:46:57 -0300
commit6125cc8dac432948a31df4d4ac20dd2d4f8c6c27 (patch)
tree2ce2dc50335fc524b1041c9ea918c21467bb7ff2 /tools/perf/Documentation/perf-script.txt
parentd327e60cfae2201bcdee5aeb9b5a42e3988b184f (diff)
downloadlinux-6125cc8dac432948a31df4d4ac20dd2d4f8c6c27.tar.gz
perf script: Add --max-stack knob
Works just like with 'perf report'. In some cases we may want to have more than 127 entries, the default maximum. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-mqkz2p5ok2978gztb0vsnocc@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-script.txt')
-rw-r--r--tools/perf/Documentation/perf-script.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 22ef3933342a..4fc44c75263f 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -259,6 +259,16 @@ include::itrace.txt[]
--full-source-path::
Show the full path for source files for srcline output.
+--max-stack::
+ Set the stack depth limit when parsing the callchain, anything
+ beyond the specified depth will be ignored. This is a trade-off
+ between information loss and faster processing especially for
+ workloads that can have a very long callchain stack.
+ Note that when using the --itrace option the synthesized callchain size
+ will override this value if the synthesized callchain size is bigger.
+
+ Default: 127
+
--ns::
Use 9 decimal places when displaying time (i.e. show the nanoseconds)