diff options
| -rw-r--r-- | tools/perf/Documentation/perf-stat.txt | 5 | ||||
| -rw-r--r-- | tools/perf/builtin-stat.c | 20 | ||||
| -rw-r--r-- | tools/perf/util/stat.h | 1 |
3 files changed, 25 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt index 823fce7674bb..47a21645f60c 100644 --- a/tools/perf/Documentation/perf-stat.txt +++ b/tools/perf/Documentation/perf-stat.txt @@ -146,6 +146,11 @@ Print count deltas every N milliseconds (minimum: 10ms) The overhead percentage could be high in some cases, for instance with small, sub 100ms intervals. Use with caution. example: 'perf stat -I 1000 -e cycles -a sleep 5' +--interval-count times:: +Print count deltas for fixed number of times. +This option should be used together with "-I" option. + example: 'perf stat -I 1000 --interval-count 2 -e cycles -a' + --metric-only:: Only print computed metrics. Print them in a single line. Don't show any raw values. Not supported with --per-thread. diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 98bf9d32f222..7d1d7613bf56 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -168,6 +168,7 @@ static struct timespec ref_time; static struct cpu_map *aggr_map; static aggr_get_id_t aggr_get_id; static bool append_file; +static bool interval_count; static const char *output_name; static int output_fd; static int print_free_counters_hint; @@ -571,6 +572,7 @@ static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel) static int __run_perf_stat(int argc, const char **argv) { int interval = stat_config.interval; + int times = stat_config.times; char msg[BUFSIZ]; unsigned long long t0, t1; struct perf_evsel *counter; @@ -700,6 +702,8 @@ try_again: while (!waitpid(child_pid, &status, WNOHANG)) { nanosleep(&ts, NULL); process_interval(); + if (interval_count && !(--times)) + break; } } waitpid(child_pid, &status, 0); @@ -716,8 +720,11 @@ try_again: enable_counters(); while (!done) { nanosleep(&ts, NULL); - if (interval) + if (interval) { process_interval(); + if (interval_count && !(--times)) + break; + } } } @@ -1891,6 +1898,8 @@ static const struct option stat_options[] = { "command to run after to the measured command"), OPT_UINTEGER('I', "interval-print", &stat_config.interval, "print counts at regular interval in ms (>= 10)"), + OPT_INTEGER(0, "interval-count", &stat_config.times, + "print counts for fixed number of times"), OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, "aggregate counts per processor socket", AGGR_SOCKET), OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, @@ -2870,6 +2879,15 @@ int cmd_stat(int argc, const char **argv) "The overhead percentage could be high in some cases. " "Please proceed with caution.\n"); } + if (stat_config.times && interval) + interval_count = true; + else if (stat_config.times && !interval) { + pr_err("interval-count option should be used together with " + "interval-print.\n"); + parse_options_usage(stat_usage, stat_options, "interval-count", 0); + parse_options_usage(stat_usage, stat_options, "I", 1); + goto out; + } if (perf_evlist__alloc_stats(evsel_list, interval)) goto out; diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h index dbc6f7134f61..540fbb350e53 100644 --- a/tools/perf/util/stat.h +++ b/tools/perf/util/stat.h @@ -90,6 +90,7 @@ struct perf_stat_config { bool scale; FILE *output; unsigned int interval; + int times; struct runtime_stat *stats; int stats_num; }; |