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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>
wifi-calibration
David Ahern 2013-08-07 22:50:53 -04:00 committed by Arnaldo Carvalho de Melo
parent b0b35f0179
commit 307cbb92aa
3 changed files with 9 additions and 5 deletions
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6
tools/perf/builtin-script.c
View File

@ -402,7 +402,8 @@ static void print_sample_bts(union perf_event *event,
else
printf("\n");
perf_evsel__print_ip(evsel, event, sample, machine,
output[attr->type].print_ip_opts);
output[attr->type].print_ip_opts,
PERF_MAX_STACK_DEPTH);
}
printf(" => ");
@ -444,7 +445,8 @@ static void process_event(union perf_event *event, struct perf_sample *sample,
printf("\n");
perf_evsel__print_ip(evsel, event, sample, machine,
output[attr->type].print_ip_opts);
output[attr->type].print_ip_opts,
PERF_MAX_STACK_DEPTH);
}
printf("\n");

6
tools/perf/util/session.c
View File

@ -1489,7 +1489,7 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
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 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
}
callchain_cursor_commit(&callchain_cursor);
while (1) {
while (stack_depth) {
node = callchain_cursor_current(&callchain_cursor);
if (!node)
break;
@ -1544,6 +1544,8 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
printf("\n");
callchain_cursor_advance(&callchain_cursor);
stack_depth--;
}
} else {

2
tools/perf/util/session.h
View File

@ -109,7 +109,7 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
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);
int perf_session__cpu_bitmap(struct perf_session *session,
const char *cpu_list, unsigned long *cpu_bitmap);