diff options
| author | David Ahern <dsahern@gmail.com> | 2013-11-18 13:32:44 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-11-27 14:58:37 -0300 |
| commit | d2ff1b1499c8e0ad2fc79376a4215ba37771823f (patch) | |
| tree | ac2dcb9536fff5a8232519e5306ad05b3ed8900d /tools/perf/util/session.c | |
| parent | 6f8d67fa0c6bdca535ecab137c44b095023cc1b4 (diff) | |
perf evsel: Skip ignored symbols while printing callchain
Allows a command to have a symbol_filter controlled by the user to skip
certain functions in a backtrace. One example is to allow the user to
reduce repeating patterns like:
do_select core_sys_select sys_select
to just sys_select when dumping callchains, consuming less real estate
on the screen while still conveying the essential message - the process
is in a select call.
This option is leveraged by the upcoming timehist command.
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1384806771-2945-2-git-send-email-dsahern@gmail.com
[ Checked if al.sym is NULL before touching al.sym->ignored, as noted by Adrian Hunter ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/session.c')
| -rw-r--r-- | tools/perf/util/session.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index f36d24a0244..b0b15e213df 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1522,6 +1522,9 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, if (!node) break; + if (node->sym && node->sym->ignore) + goto next; + if (print_ip) printf("%c%16" PRIx64, s, node->ip); @@ -1544,12 +1547,15 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, if (!print_oneline) printf("\n"); - callchain_cursor_advance(&callchain_cursor); - stack_depth--; +next: + callchain_cursor_advance(&callchain_cursor); } } else { + if (al.sym && al.sym->ignore) + return; + if (print_ip) printf("%16" PRIx64, sample->ip); |