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| author | Waiman Long <Waiman.Long@hp.com> | 2013-10-18 10:38:49 -0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-10-21 17:36:25 -0300 |
| commit | 5dbb6e81d85e55ee2b4cf523c1738e16f63e5400 (patch) | |
| tree | 334d7cd3884dde1e7f9d35e0be561f82edc92ccf /tools/perf/util/top.h | |
| parent | 91e95617429cb272fd908b1928a1915b37b9655f (diff) | |
| download | linux-5dbb6e81d85e55ee2b4cf523c1738e16f63e5400.tar.bz2 | |
perf top: Add --max-stack option to limit callchain stack scan
When the callgraph function is enabled (-G), it may take a long time to
scan all the stack data and merge them accordingly.
This patch adds a new --max-stack option to perf-top to limit the depth
of callchain stack data to look at to reduce the time it takes for
perf-top to finish its processing. It reduces the amount of information
provided to the user in exchange for faster speed.
Signed-off-by: Waiman Long <Waiman.Long@hp.com>
Acked-by: David Ahern <dsahern@gmail.com>
Tested-by: Davidlohr Bueso <davidlohr@hp.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Scott J Norton <scott.norton@hp.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1382107129-2010-5-git-send-email-Waiman.Long@hp.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/top.h')
| -rw-r--r-- | tools/perf/util/top.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h index b554ffc462b6..88cfeaff600b 100644 --- a/tools/perf/util/top.h +++ b/tools/perf/util/top.h @@ -24,6 +24,7 @@ struct perf_top { u64 exact_samples; u64 guest_us_samples, guest_kernel_samples; int print_entries, count_filter, delay_secs; + int max_stack; bool hide_kernel_symbols, hide_user_symbols, zero; bool use_tui, use_stdio; bool kptr_restrict_warned; |