perf stat: Add --pre and --post command (1f16c575) · Commits · 戴 / test

tools/perf/Documentation/perf-stat.txt

+5 −0

Original line number	Diff line number	Diff line
		@@ -108,6 +108,11 @@ with it. --append may be used here. Examples:
		3>results perf stat --log-fd 3 -- $cmd
		3>>results perf stat --log-fd 3 --append -- $cmd

		--pre::
		--post::
		Pre and post measurement hooks, e.g.:

		perf stat --repeat 10 --null --sync --pre 'make -s O=defconfig-build/clean' -- make -s -j64 O=defconfig-build/ bzImage


		EXAMPLES

tools/perf/builtin-stat.c

+36 −6

Original line number	Diff line number	Diff line
		@@ -57,6 +57,7 @@
		#include "util/thread.h"
		#include "util/thread_map.h"

		#include <stdlib.h>
		#include <sys/prctl.h>
		#include <locale.h>

		@@ -83,6 +84,9 @@ static const char *csv_sep = NULL;
		static bool csv_output = false;
		static bool group = false;
		static FILE *output = NULL;
		static const char *pre_cmd = NULL;
		static const char *post_cmd = NULL;
		static bool sync_run = false;

		static volatile int done = 0;

		@@ -265,7 +269,7 @@ static int read_counter(struct perf_evsel *counter)
		return 0;
		}

		static int run_perf_stat(int argc __maybe_unused, const char **argv)
		static int __run_perf_stat(int argc __maybe_unused, const char **argv)
		{
		unsigned long long t0, t1;
		struct perf_evsel counter, first;
		@@ -405,6 +409,32 @@ static int run_perf_stat(int argc __maybe_unused, const char **argv)
		return WEXITSTATUS(status);
		}

		static int run_perf_stat(int argc __maybe_unused, const char **argv)
		{
		int ret;

		if (pre_cmd) {
		ret = system(pre_cmd);
		if (ret)
		return ret;
		}

		if (sync_run)
		sync();

		ret = __run_perf_stat(argc, argv);
		if (ret)
		return ret;

		if (post_cmd) {
		ret = system(post_cmd);
		if (ret)
		return ret;
		}

		return ret;
		}

		static void print_noise_pct(double total, double avg)
		{
		double pct = rel_stddev_stats(total, avg);
		@@ -1069,8 +1099,7 @@ static int add_default_attributes(void)

		int cmd_stat(int argc, const char *argv, const char prefix __maybe_unused)
		{
		bool append_file = false,
		sync_run = false;
		bool append_file = false;
		int output_fd = 0;
		const char *output_name = NULL;
		const struct option options[] = {
		@@ -1114,6 +1143,10 @@ int cmd_stat(int argc, const char *argv, const char prefix __maybe_unused)
		OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
		OPT_INTEGER(0, "log-fd", &output_fd,
		"log output to fd, instead of stderr"),
		OPT_STRING(0, "pre", &pre_cmd, "command",
		"command to run prior to the measured command"),
		OPT_STRING(0, "post", &post_cmd, "command",
		"command to run after to the measured command"),
		OPT_END()
		};
		const char * const stat_usage[] = {
		@@ -1238,9 +1271,6 @@ int cmd_stat(int argc, const char *argv, const char prefix __maybe_unused)
		fprintf(output, "[ perf stat: executing run #%d ... ]\n",
		run_idx + 1);

		if (sync_run)
		sync();

		status = run_perf_stat(argc, argv);
		}

Admin message