upload tizen1.0 sourceHEADmaster2.0alpha

1 files changed, 626 insertions, 0 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
new file mode 100644
index 00000000..a6b4d44f
--- /dev/null
+++ b/tools/perf/builtin-stat.c
@@ -0,0 +1,626 @@
+/*
+ * builtin-stat.c
+ *
+ * Builtin stat command: Give a precise performance counters summary
+ * overview about any workload, CPU or specific PID.
+ *
+ * Sample output:
+
+   $ perf stat ~/hackbench 10
+   Time: 0.104
+
+    Performance counter stats for '/home/mingo/hackbench':
+
+       1255.538611  task clock ticks     #      10.143 CPU utilization factor
+             54011  context switches     #       0.043 M/sec
+               385  CPU migrations       #       0.000 M/sec
+             17755  pagefaults           #       0.014 M/sec
+        3808323185  CPU cycles           #    3033.219 M/sec
+        1575111190  instructions         #    1254.530 M/sec
+          17367895  cache references     #      13.833 M/sec
+           7674421  cache misses         #       6.112 M/sec
+
+    Wall-clock time elapsed:   123.786620 msecs
+
+ *
+ * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
+ *
+ * Improvements and fixes by:
+ *
+ *   Arjan van de Ven <arjan@linux.intel.com>
+ *   Yanmin Zhang <yanmin.zhang@intel.com>
+ *   Wu Fengguang <fengguang.wu@intel.com>
+ *   Mike Galbraith <efault@gmx.de>
+ *   Paul Mackerras <paulus@samba.org>
+ *   Jaswinder Singh Rajput <jaswinder@kernel.org>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+
+#include "perf.h"
+#include "builtin.h"
+#include "util/util.h"
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+#include "util/event.h"
+#include "util/debug.h"
+#include "util/header.h"
+#include "util/cpumap.h"
+#include "util/thread.h"
+
+#include <sys/prctl.h>
+#include <math.h>
+#include <locale.h>
+
+static struct perf_event_attr default_attrs[] = {
+
+  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK		},
+  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES	},
+  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS		},
+  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS		},
+
+  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES		},
+  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS		},
+  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS	},
+  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES		},
+  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES	},
+  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES		},
+
+};
+
+static bool			system_wide			=  false;
+static int			nr_cpus				=  0;
+static int			run_idx				=  0;
+
+static int			run_count			=  1;
+static bool			no_inherit			= false;
+static bool			scale				=  true;
+static pid_t			target_pid			= -1;
+static pid_t			target_tid			= -1;
+static pid_t			*all_tids			=  NULL;
+static int			thread_num			=  0;
+static pid_t			child_pid			= -1;
+static bool			null_run			=  false;
+static bool			big_num				=  false;
+static const char		*cpu_list;
+
+
+static int			*fd[MAX_NR_CPUS][MAX_COUNTERS];
+
+static int			event_scaled[MAX_COUNTERS];
+
+static volatile int done = 0;
+
+struct stats
+{
+	double n, mean, M2;
+};
+
+static void update_stats(struct stats *stats, u64 val)
+{
+	double delta;
+
+	stats->n++;
+	delta = val - stats->mean;
+	stats->mean += delta / stats->n;
+	stats->M2 += delta*(val - stats->mean);
+}
+
+static double avg_stats(struct stats *stats)
+{
+	return stats->mean;
+}
+
+/*
+ * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
+ *
+ *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
+ * s^2 = -------------------------------
+ *                  n - 1
+ *
+ * http://en.wikipedia.org/wiki/Stddev
+ *
+ * The std dev of the mean is related to the std dev by:
+ *
+ *             s
+ * s_mean = -------
+ *          sqrt(n)
+ *
+ */
+static double stddev_stats(struct stats *stats)
+{
+	double variance = stats->M2 / (stats->n - 1);
+	double variance_mean = variance / stats->n;
+
+	return sqrt(variance_mean);
+}
+
+struct stats			event_res_stats[MAX_COUNTERS][3];
+struct stats			runtime_nsecs_stats;
+struct stats			walltime_nsecs_stats;
+struct stats			runtime_cycles_stats;
+struct stats			runtime_branches_stats;
+
+#define MATCH_EVENT(t, c, counter)			\
+	(attrs[counter].type == PERF_TYPE_##t &&	\
+	 attrs[counter].config == PERF_COUNT_##c)
+
+#define ERR_PERF_OPEN \
+"Error: counter %d, sys_perf_event_open() syscall returned with %d (%s)\n"
+
+static int create_perf_stat_counter(int counter)
+{
+	struct perf_event_attr *attr = attrs + counter;
+	int thread;
+	int ncreated = 0;
+
+	if (scale)
+		attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
+				    PERF_FORMAT_TOTAL_TIME_RUNNING;
+
+	if (system_wide) {
+		int cpu;
+
+		for (cpu = 0; cpu < nr_cpus; cpu++) {
+			fd[cpu][counter][0] = sys_perf_event_open(attr,
+					-1, cpumap[cpu], -1, 0);
+			if (fd[cpu][counter][0] < 0)
+				pr_debug(ERR_PERF_OPEN, counter,
+					 fd[cpu][counter][0], strerror(errno));
+			else
+				++ncreated;
+		}
+	} else {
+		attr->inherit = !no_inherit;
+		if (target_pid == -1 && target_tid == -1) {
+			attr->disabled = 1;
+			attr->enable_on_exec = 1;
+		}
+		for (thread = 0; thread < thread_num; thread++) {
+			fd[0][counter][thread] = sys_perf_event_open(attr,
+				all_tids[thread], -1, -1, 0);
+			if (fd[0][counter][thread] < 0)
+				pr_debug(ERR_PERF_OPEN, counter,
+					 fd[0][counter][thread],
+					 strerror(errno));
+			else
+				++ncreated;
+		}
+	}
+
+	return ncreated;
+}
+
+/*
+ * Does the counter have nsecs as a unit?
+ */
+static inline int nsec_counter(int counter)
+{
+	if (MATCH_EVENT(SOFTWARE, SW_CPU_CLOCK, counter) ||
+	    MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
+		return 1;
+
+	return 0;
+}
+
+/*
+ * Read out the results of a single counter:
+ */
+static void read_counter(int counter)
+{
+	u64 count[3], single_count[3];
+	int cpu;
+	size_t res, nv;
+	int scaled;
+	int i, thread;
+
+	count[0] = count[1] = count[2] = 0;
+
+	nv = scale ? 3 : 1;
+	for (cpu = 0; cpu < nr_cpus; cpu++) {
+		for (thread = 0; thread < thread_num; thread++) {
+			if (fd[cpu][counter][thread] < 0)
+				continue;
+
+			res = read(fd[cpu][counter][thread],
+					single_count, nv * sizeof(u64));
+			assert(res == nv * sizeof(u64));
+
+			close(fd[cpu][counter][thread]);
+			fd[cpu][counter][thread] = -1;
+
+			count[0] += single_count[0];
+			if (scale) {
+				count[1] += single_count[1];
+				count[2] += single_count[2];
+			}
+		}
+	}
+
+	scaled = 0;
+	if (scale) {
+		if (count[2] == 0) {
+			event_scaled[counter] = -1;
+			count[0] = 0;
+			return;
+		}
+
+		if (count[2] < count[1]) {
+			event_scaled[counter] = 1;
+			count[0] = (unsigned long long)
+				((double)count[0] * count[1] / count[2] + 0.5);
+		}
+	}
+
+	for (i = 0; i < 3; i++)
+		update_stats(&event_res_stats[counter][i], count[i]);
+
+	if (verbose) {
+		fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter),
+				count[0], count[1], count[2]);
+	}
+
+	/*
+	 * Save the full runtime - to allow normalization during printout:
+	 */
+	if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter))
+		update_stats(&runtime_nsecs_stats, count[0]);
+	if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter))
+		update_stats(&runtime_cycles_stats, count[0]);
+	if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter))
+		update_stats(&runtime_branches_stats, count[0]);
+}
+
+static int run_perf_stat(int argc __used, const char **argv)
+{
+	unsigned long long t0, t1;
+	int status = 0;
+	int counter, ncreated = 0;
+	int child_ready_pipe[2], go_pipe[2];
+	const bool forks = (argc > 0);
+	char buf;
+
+	if (!system_wide)
+		nr_cpus = 1;
+
+	if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
+		perror("failed to create pipes");
+		exit(1);
+	}
+
+	if (forks) {
+		if ((child_pid = fork()) < 0)
+			perror("failed to fork");
+
+		if (!child_pid) {
+			close(child_ready_pipe[0]);
+			close(go_pipe[1]);
+			fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
+
+			/*
+			 * Do a dummy execvp to get the PLT entry resolved,
+			 * so we avoid the resolver overhead on the real
+			 * execvp call.
+			 */
+			execvp("", (char **)argv);
+
+			/*
+			 * Tell the parent we're ready to go
+			 */
+			close(child_ready_pipe[1]);
+
+			/*
+			 * Wait until the parent tells us to go.
+			 */
+			if (read(go_pipe[0], &buf, 1) == -1)
+				perror("unable to read pipe");
+
+			execvp(argv[0], (char **)argv);
+
+			perror(argv[0]);
+			exit(-1);
+		}
+
+		if (target_tid == -1 && target_pid == -1 && !system_wide)
+			all_tids[0] = child_pid;
+
+		/*
+		 * Wait for the child to be ready to exec.
+		 */
+		close(child_ready_pipe[1]);
+		close(go_pipe[0]);
+		if (read(child_ready_pipe[0], &buf, 1) == -1)
+			perror("unable to read pipe");
+		close(child_ready_pipe[0]);
+	}
+
+	for (counter = 0; counter < nr_counters; counter++)
+		ncreated += create_perf_stat_counter(counter);
+
+	if (ncreated == 0) {
+		pr_err("No permission to collect %sstats.\n"
+		       "Consider tweaking /proc/sys/kernel/perf_event_paranoid.\n",
+		       system_wide ? "system-wide " : "");
+		if (child_pid != -1)
+			kill(child_pid, SIGTERM);
+		return -1;
+	}
+
+	/*
+	 * Enable counters and exec the command:
+	 */
+	t0 = rdclock();
+
+	if (forks) {
+		close(go_pipe[1]);
+		wait(&status);
+	} else {
+		while(!done) sleep(1);
+	}
+
+	t1 = rdclock();
+
+	update_stats(&walltime_nsecs_stats, t1 - t0);
+
+	for (counter = 0; counter < nr_counters; counter++)
+		read_counter(counter);
+
+	return WEXITSTATUS(status);
+}
+
+static void print_noise(int counter, double avg)
+{
+	if (run_count == 1)
+		return;
+
+	fprintf(stderr, "   ( +- %7.3f%% )",
+			100 * stddev_stats(&event_res_stats[counter][0]) / avg);
+}
+
+static void nsec_printout(int counter, double avg)
+{
+	double msecs = avg / 1e6;
+
+	fprintf(stderr, " %18.6f  %-24s", msecs, event_name(counter));
+
+	if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) {
+		fprintf(stderr, " # %10.3f CPUs ",
+				avg / avg_stats(&walltime_nsecs_stats));
+	}
+}
+
+static void abs_printout(int counter, double avg)
+{
+	double total, ratio = 0.0;
+
+	if (big_num)
+		fprintf(stderr, " %'18.0f  %-24s", avg, event_name(counter));
+	else
+		fprintf(stderr, " %18.0f  %-24s", avg, event_name(counter));
+
+	if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) {
+		total = avg_stats(&runtime_cycles_stats);
+
+		if (total)
+			ratio = avg / total;
+
+		fprintf(stderr, " # %10.3f IPC  ", ratio);
+	} else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) &&
+			runtime_branches_stats.n != 0) {
+		total = avg_stats(&runtime_branches_stats);
+
+		if (total)
+			ratio = avg * 100 / total;
+
+		fprintf(stderr, " # %10.3f %%    ", ratio);
+
+	} else if (runtime_nsecs_stats.n != 0) {
+		total = avg_stats(&runtime_nsecs_stats);
+
+		if (total)
+			ratio = 1000.0 * avg / total;
+
+		fprintf(stderr, " # %10.3f M/sec", ratio);
+	}
+}
+
+/*
+ * Print out the results of a single counter:
+ */
+static void print_counter(int counter)
+{
+	double avg = avg_stats(&event_res_stats[counter][0]);
+	int scaled = event_scaled[counter];
+
+	if (scaled == -1) {
+		fprintf(stderr, " %18s  %-24s\n",
+			"<not counted>", event_name(counter));
+		return;
+	}
+
+	if (nsec_counter(counter))
+		nsec_printout(counter, avg);
+	else
+		abs_printout(counter, avg);
+
+	print_noise(counter, avg);
+
+	if (scaled) {
+		double avg_enabled, avg_running;
+
+		avg_enabled = avg_stats(&event_res_stats[counter][1]);
+		avg_running = avg_stats(&event_res_stats[counter][2]);
+
+		fprintf(stderr, "  (scaled from %.2f%%)",
+				100 * avg_running / avg_enabled);
+	}
+
+	fprintf(stderr, "\n");
+}
+
+static void print_stat(int argc, const char **argv)
+{
+	int i, counter;
+
+	fflush(stdout);
+
+	fprintf(stderr, "\n");
+	fprintf(stderr, " Performance counter stats for ");
+	if(target_pid == -1 && target_tid == -1) {
+		fprintf(stderr, "\'%s", argv[0]);
+		for (i = 1; i < argc; i++)
+			fprintf(stderr, " %s", argv[i]);
+	} else if (target_pid != -1)
+		fprintf(stderr, "process id \'%d", target_pid);
+	else
+		fprintf(stderr, "thread id \'%d", target_tid);
+
+	fprintf(stderr, "\'");
+	if (run_count > 1)
+		fprintf(stderr, " (%d runs)", run_count);
+	fprintf(stderr, ":\n\n");
+
+	for (counter = 0; counter < nr_counters; counter++)
+		print_counter(counter);
+
+	fprintf(stderr, "\n");
+	fprintf(stderr, " %18.9f  seconds time elapsed",
+			avg_stats(&walltime_nsecs_stats)/1e9);
+	if (run_count > 1) {
+		fprintf(stderr, "   ( +- %7.3f%% )",
+				100*stddev_stats(&walltime_nsecs_stats) /
+				avg_stats(&walltime_nsecs_stats));
+	}
+	fprintf(stderr, "\n\n");
+}
+
+static volatile int signr = -1;
+
+static void skip_signal(int signo)
+{
+	if(child_pid == -1)
+		done = 1;
+
+	signr = signo;
+}
+
+static void sig_atexit(void)
+{
+	if (child_pid != -1)
+		kill(child_pid, SIGTERM);
+
+	if (signr == -1)
+		return;
+
+	signal(signr, SIG_DFL);
+	kill(getpid(), signr);
+}
+
+static const char * const stat_usage[] = {
+	"perf stat [<options>] [<command>]",
+	NULL
+};
+
+static const struct option options[] = {
+	OPT_CALLBACK('e', "event", NULL, "event",
+		     "event selector. use 'perf list' to list available events",
+		     parse_events),
+	OPT_BOOLEAN('i', "no-inherit", &no_inherit,
+		    "child tasks do not inherit counters"),
+	OPT_INTEGER('p', "pid", &target_pid,
+		    "stat events on existing process id"),
+	OPT_INTEGER('t', "tid", &target_tid,
+		    "stat events on existing thread id"),
+	OPT_BOOLEAN('a', "all-cpus", &system_wide,
+		    "system-wide collection from all CPUs"),
+	OPT_BOOLEAN('c', "scale", &scale,
+		    "scale/normalize counters"),
+	OPT_INCR('v', "verbose", &verbose,
+		    "be more verbose (show counter open errors, etc)"),
+	OPT_INTEGER('r', "repeat", &run_count,
+		    "repeat command and print average + stddev (max: 100)"),
+	OPT_BOOLEAN('n', "null", &null_run,
+		    "null run - dont start any counters"),
+	OPT_BOOLEAN('B', "big-num", &big_num,
+		    "print large numbers with thousands\' separators"),
+	OPT_STRING('C', "cpu", &cpu_list, "cpu",
+		    "list of cpus to monitor in system-wide"),
+	OPT_END()
+};
+
+int cmd_stat(int argc, const char **argv, const char *prefix __used)
+{
+	int status;
+	int i,j;
+
+	setlocale(LC_ALL, "");
+
+	argc = parse_options(argc, argv, options, stat_usage,
+		PARSE_OPT_STOP_AT_NON_OPTION);
+	if (!argc && target_pid == -1 && target_tid == -1)
+		usage_with_options(stat_usage, options);
+	if (run_count <= 0)
+		usage_with_options(stat_usage, options);
+
+	/* Set attrs and nr_counters if no event is selected and !null_run */
+	if (!null_run && !nr_counters) {
+		memcpy(attrs, default_attrs, sizeof(default_attrs));
+		nr_counters = ARRAY_SIZE(default_attrs);
+	}
+
+	if (system_wide)
+		nr_cpus = read_cpu_map(cpu_list);
+	else
+		nr_cpus = 1;
+
+	if (nr_cpus < 1)
+		usage_with_options(stat_usage, options);
+
+	if (target_pid != -1) {
+		target_tid = target_pid;
+		thread_num = find_all_tid(target_pid, &all_tids);
+		if (thread_num <= 0) {
+			fprintf(stderr, "Can't find all threads of pid %d\n",
+					target_pid);
+			usage_with_options(stat_usage, options);
+		}
+	} else {
+		all_tids=malloc(sizeof(pid_t));
+		if (!all_tids)
+			return -ENOMEM;
+
+		all_tids[0] = target_tid;
+		thread_num = 1;
+	}
+
+	for (i = 0; i < MAX_NR_CPUS; i++) {
+		for (j = 0; j < MAX_COUNTERS; j++) {
+			fd[i][j] = malloc(sizeof(int)*thread_num);
+			if (!fd[i][j])
+				return -ENOMEM;
+		}
+	}
+
+	/*
+	 * We dont want to block the signals - that would cause
+	 * child tasks to inherit that and Ctrl-C would not work.
+	 * What we want is for Ctrl-C to work in the exec()-ed
+	 * task, but being ignored by perf stat itself:
+	 */
+	atexit(sig_atexit);
+	signal(SIGINT,  skip_signal);
+	signal(SIGALRM, skip_signal);
+	signal(SIGABRT, skip_signal);
+
+	status = 0;
+	for (run_idx = 0; run_idx < run_count; run_idx++) {
+		if (run_count != 1 && verbose)
+			fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
+		status = run_perf_stat(argc, argv);
+	}
+
+	if (status != -1)
+		print_stat(argc, argv);
+
+	return status;
+}