diff options
Diffstat (limited to 'tools/perf/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 8ca40de..2e70610 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -168,11 +168,18 @@ static int create_perf_stat_counter(struct perf_evsel *evsel) attr->sample_period = 0; attr->sample_type = 0; + /* + * Disabling all counters initially, they will be enabled + * either manually by us or by kernel via enable_on_exec + * set later. + */ + if (perf_evsel__is_group_leader(evsel)) + attr->disabled = 1; + if (target__has_cpu(&target)) return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel)); if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) { - attr->disabled = 1; if (!initial_delay) attr->enable_on_exec = 1; } @@ -251,12 +258,18 @@ static void process_interval(void) print_counters(&rs, 0, NULL); } -static void handle_initial_delay(void) +static void enable_counters(void) { - if (initial_delay) { + if (initial_delay) usleep(initial_delay * 1000); + + /* + * We need to enable counters only if: + * - we don't have tracee (attaching to task or cpu) + * - we have initial delay configured + */ + if (!target__none(&target) || initial_delay) perf_evlist__enable(evsel_list); - } } static volatile int workload_exec_errno; @@ -353,7 +366,7 @@ static int __run_perf_stat(int argc, const char **argv) if (forks) { perf_evlist__start_workload(evsel_list); - handle_initial_delay(); + enable_counters(); if (interval) { while (!waitpid(child_pid, &status, WNOHANG)) { @@ -372,7 +385,7 @@ static int __run_perf_stat(int argc, const char **argv) if (WIFSIGNALED(status)) psignal(WTERMSIG(status), argv[0]); } else { - handle_initial_delay(); + enable_counters(); while (!done) { nanosleep(&ts, NULL); if (interval) |
