Messages in this thread Patch in this message |  | | Date | Sat, 30 Nov 2013 04:52:20 -0800 | From | tip-bot for David Ahern <> | Subject | [tip:perf/core] perf evsel: Skip ignored symbols while printing callchain |
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Commit-ID: d2ff1b1499c8e0ad2fc79376a4215ba37771823f Gitweb: http://git.kernel.org/tip/d2ff1b1499c8e0ad2fc79376a4215ba37771823f Author: David Ahern <dsahern@gmail.com> AuthorDate: Mon, 18 Nov 2013 13:32:44 -0700 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Wed, 27 Nov 2013 14:58:37 -0300
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> --- tools/perf/util/session.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index f36d24a..b0b15e2 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);
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