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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-11-13 17:40:36 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-11-14 16:00:23 -0300 |
| commit | 37676af15c8d5a9689c9d1220d2a27d510cbe238 (patch) | |
| tree | ec331da7df85594a5793546e26d4a9d8460008c4 /tools/perf/util/unwind.h | |
| parent | d87fcb4a2d990ba2de9284ede84a816c5066d54b (diff) | |
| download | talos-obmc-linux-37676af15c8d5a9689c9d1220d2a27d510cbe238.tar.gz talos-obmc-linux-37676af15c8d5a9689c9d1220d2a27d510cbe238.zip | |
perf symbols: Limit max callchain using max_stack on DWARF unwinding too
It was affecting only frame-pointer (fp) based callchain processing.
Usage example:
perf top --call-graph dwarf,1024 --max-stack 2
Works for any tool that does callchain resolving and provides a
--max-stack option.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Waiman Long <Waiman.Long@hp.com>
Link: http://lkml.kernel.org/n/tip-eu45v8s3tq9ruay8tpfyon79@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/unwind.h')
| -rw-r--r-- | tools/perf/util/unwind.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h index ec0c71a2ca2e..d5966f49e22c 100644 --- a/tools/perf/util/unwind.h +++ b/tools/perf/util/unwind.h @@ -18,7 +18,7 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg, struct machine *machine, struct thread *thread, u64 sample_uregs, - struct perf_sample *data); + struct perf_sample *data, int max_stack); int unwind__arch_reg_id(int regnum); #else static inline int @@ -27,7 +27,8 @@ unwind__get_entries(unwind_entry_cb_t cb __maybe_unused, struct machine *machine __maybe_unused, struct thread *thread __maybe_unused, u64 sample_uregs __maybe_unused, - struct perf_sample *data __maybe_unused) + struct perf_sample *data __maybe_unused, + int max_stack __maybe_unused) { return 0; } |
