perf stat: Move 'run_count' to 'struct perf_stat_config'

Move the static 'run_count' variable to 'struct perf_stat_config', so
that it can be passed around and used outside the 'perf stat' command.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180830063252.23729-28-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 11741f3..1276596 100644 (file)
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -147,7 +147,6 @@ typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 
 #define METRIC_ONLY_LEN 20
 
-static int                     run_count                       =  1;
 static volatile pid_t          child_pid                       = -1;
 static bool                    null_run                        =  false;
 static int                     detailed_run                    =  0;
@@ -200,6 +199,7 @@ static struct perf_stat_config stat_config = {
        .aggr_mode      = AGGR_GLOBAL,
        .scale          = true,
        .unit_width     = 4, /* strlen("unit") */
+       .run_count      = 1,
 };
 
 static bool is_duration_time(struct perf_evsel *evsel)
@@ -686,7 +686,7 @@ static void print_noise(struct perf_stat_config *config,
 {
        struct perf_stat_evsel *ps;
 
-       if (run_count == 1)
+       if (config->run_count == 1)
                return;
 
        ps = evsel->stats;
@@ -1620,8 +1620,8 @@ static void print_header(struct perf_stat_config *config,
                        fprintf(output, "thread id \'%s", _target->tid);
 
                fprintf(output, "\'");
-               if (run_count > 1)
-                       fprintf(output, " (%d runs)", run_count);
+               if (config->run_count > 1)
+                       fprintf(output, " (%d runs)", config->run_count);
                fprintf(output, ":\n\n");
        }
 }
@@ -1634,7 +1634,8 @@ static int get_precision(double num)
        return lround(ceil(-log10(num)));
 }
 
-static void print_table(FILE *output, int precision, double avg)
+static void print_table(struct perf_stat_config *config,
+                       FILE *output, int precision, double avg)
 {
        char tmp[64];
        int idx, indent = 0;
@@ -1645,7 +1646,7 @@ static void print_table(FILE *output, int precision, double avg)
 
        fprintf(output, "%*s# Table of individual measurements:\n", indent, "");
 
-       for (idx = 0; idx < run_count; idx++) {
+       for (idx = 0; idx < config->run_count; idx++) {
                double run = (double) walltime_run[idx] / NSEC_PER_SEC;
                int h, n = 1 + abs((int) (100.0 * (run - avg)/run) / 5);
 
@@ -1675,7 +1676,7 @@ static void print_footer(struct perf_stat_config *config)
        if (!null_run)
                fprintf(output, "\n");
 
-       if (run_count == 1) {
+       if (config->run_count == 1) {
                fprintf(output, " %17.9f seconds time elapsed", avg);
 
                if (ru_display) {
@@ -1695,7 +1696,7 @@ static void print_footer(struct perf_stat_config *config)
                int precision = get_precision(sd) + 2;
 
                if (walltime_run_table)
-                       print_table(output, precision, avg);
+                       print_table(config, output, precision, avg);
 
                fprintf(output, " %17.*f +- %.*f seconds time elapsed",
                        precision, avg, precision, sd);
@@ -1886,7 +1887,7 @@ static const struct option stat_options[] = {
        OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
        OPT_INCR('v', "verbose", &verbose,
                    "be more verbose (show counter open errors, etc)"),
-       OPT_INTEGER('r', "repeat", &run_count,
+       OPT_INTEGER('r', "repeat", &stat_config.run_count,
                    "repeat command and print average + stddev (max: 100, forever: 0)"),
        OPT_BOOLEAN(0, "table", &walltime_run_table,
                    "display details about each run (only with -r option)"),
@@ -2484,7 +2485,7 @@ static int __cmd_record(int argc, const char **argv)
        if (output_name)
                data->file.path = output_name;
 
-       if (run_count != 1 || forever) {
+       if (stat_config.run_count != 1 || forever) {
                pr_err("Cannot use -r option with perf stat record.\n");
                return -1;
        }
@@ -2792,12 +2793,12 @@ int cmd_stat(int argc, const char **argv)
                goto out;
        }
 
-       if (stat_config.metric_only && run_count > 1) {
+       if (stat_config.metric_only && stat_config.run_count > 1) {
                fprintf(stderr, "--metric-only is not supported with -r\n");
                goto out;
        }
 
-       if (walltime_run_table && run_count <= 1) {
+       if (walltime_run_table && stat_config.run_count <= 1) {
                fprintf(stderr, "--table is only supported with -r\n");
                parse_options_usage(stat_usage, stat_options, "r", 1);
                parse_options_usage(NULL, stat_options, "table", 0);
@@ -2853,20 +2854,20 @@ int cmd_stat(int argc, const char **argv)
         * Display user/system times only for single
         * run and when there's specified tracee.
         */
-       if ((run_count == 1) && target__none(&target))
+       if ((stat_config.run_count == 1) && target__none(&target))
                ru_display = true;
 
-       if (run_count < 0) {
+       if (stat_config.run_count < 0) {
                pr_err("Run count must be a positive number\n");
                parse_options_usage(stat_usage, stat_options, "r", 1);
                goto out;
-       } else if (run_count == 0) {
+       } else if (stat_config.run_count == 0) {
                forever = true;
-               run_count = 1;
+               stat_config.run_count = 1;
        }
 
        if (walltime_run_table) {
-               walltime_run = zalloc(run_count * sizeof(walltime_run[0]));
+               walltime_run = zalloc(stat_config.run_count * sizeof(walltime_run[0]));
                if (!walltime_run) {
                        pr_err("failed to setup -r option");
                        goto out;
@@ -2994,8 +2995,8 @@ int cmd_stat(int argc, const char **argv)
        signal(SIGABRT, skip_signal);
 
        status = 0;
-       for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
-               if (run_count != 1 && verbose > 0)
+       for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
+               if (stat_config.run_count != 1 && verbose > 0)
                        fprintf(output, "[ perf stat: executing run #%d ... ]\n",
                                run_idx + 1);
 

diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 2dc66e0..351a36f 100644 (file)
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -100,6 +100,7 @@ struct perf_stat_config {
        unsigned int             initial_delay;
        unsigned int             unit_width;
        int                      times;
+       int                      run_count;
        struct runtime_stat     *stats;
        int                      stats_num;
        const char              *csv_sep;