Commit-ID: d2ff1b1499c8e0ad2fc79376a4215ba37771823f
Gitweb: http://git.kernel.org/tip/d2ff1b1499c8e0ad2fc79376a4215ba37771823f
Author: David Ahern <dsahern@xxxxxxxxx>
AuthorDate: Mon, 18 Nov 2013 13:32:44 -0700
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
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@xxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1384806771-2945-2-git-send-email-dsahern@xxxxxxxxx
[ Checked if al.sym is NULL before touching al.sym->ignored, as noted by Adrian Hunter ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
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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