diff options
Diffstat (limited to 'tools/perf/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index a5a0f48410035..9d5c503e698f8 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -487,16 +487,26 @@ static bool handle_interval(unsigned int interval, int *times) static void enable_counters(void) { - if (stat_config.initial_delay) + if (stat_config.initial_delay < 0) { + pr_info(EVLIST_DISABLED_MSG); + return; + } + + if (stat_config.initial_delay > 0) { + pr_info(EVLIST_DISABLED_MSG); usleep(stat_config.initial_delay * USEC_PER_MSEC); + } /* * 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) || stat_config.initial_delay) + if (!target__none(&target) || stat_config.initial_delay) { evlist__enable(evsel_list); + if (stat_config.initial_delay > 0) + pr_info(EVLIST_ENABLED_MSG); + } } static void disable_counters(void) @@ -1053,8 +1063,8 @@ static struct option stat_options[] = { "aggregate counts per thread", AGGR_THREAD), OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode, "aggregate counts per numa node", AGGR_NODE), - OPT_UINTEGER('D', "delay", &stat_config.initial_delay, - "ms to wait before starting measurement after program start"), + OPT_INTEGER('D', "delay", &stat_config.initial_delay, + "ms to wait before starting measurement after program start (-1: start with events disabled)"), OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, "Only print computed metrics. No raw values", enable_metric_only), OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group, |