perf evsel: Add option to limit stack depth in callchain dumps
Option is used by upcoming timehist command.
Signed-off-by: David Ahern <dsahern@gmail.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/1375930261-77273-12-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0d895e7..5a89964 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1489,7 +1489,7 @@
void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
struct perf_sample *sample, struct machine *machine,
- unsigned int print_opts)
+ unsigned int print_opts, unsigned int stack_depth)
{
struct addr_location al;
struct callchain_cursor_node *node;
@@ -1517,7 +1517,7 @@
}
callchain_cursor_commit(&callchain_cursor);
- while (1) {
+ while (stack_depth) {
node = callchain_cursor_current(&callchain_cursor);
if (!node)
break;
@@ -1544,6 +1544,8 @@
printf("\n");
callchain_cursor_advance(&callchain_cursor);
+
+ stack_depth--;
}
} else {