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

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

Add 'struct perf_stat_config' argument to create_perf_stat_counter() and
use its 'initial_delay' member instead of the static one.

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/20180830063252.23729-3-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 d389ed6..719abdd 100644 (file)
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -164,7 +164,6 @@ static bool                 group                           = false;
 static const char              *pre_cmd                        = NULL;
 static const char              *post_cmd                       = NULL;
 static bool                    sync_run                        = false;
-static unsigned int            initial_delay                   = 0;
 static unsigned int            unit_width                      = 4; /* strlen("unit") */
 static bool                    forever                         = false;
 static bool                    metric_only                     = false;
@@ -236,7 +235,8 @@ static void perf_stat__reset_stats(void)
                perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 }
 
-static int create_perf_stat_counter(struct perf_evsel *evsel)
+static int create_perf_stat_counter(struct perf_evsel *evsel,
+                                   struct perf_stat_config *config)
 {
        struct perf_event_attr *attr = &evsel->attr;
        struct perf_evsel *leader = evsel->leader;
@@ -286,7 +286,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel)
                 * In case of initial_delay we enable tracee
                 * events manually.
                 */
-               if (target__none(&target) && !initial_delay)
+               if (target__none(&target) && !config->initial_delay)
                        attr->enable_on_exec = 1;
        }
 
@@ -428,15 +428,15 @@ static void process_interval(void)
 
 static void enable_counters(void)
 {
-       if (initial_delay)
-               usleep(initial_delay * USEC_PER_MSEC);
+       if (stat_config.initial_delay)
+               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) || initial_delay)
+       if (!target__none(&target) || stat_config.initial_delay)
                perf_evlist__enable(evsel_list);
 }
 
@@ -609,7 +609,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
 
        evlist__for_each_entry(evsel_list, counter) {
 try_again:
-               if (create_perf_stat_counter(counter) < 0) {
+               if (create_perf_stat_counter(counter, &stat_config) < 0) {
 
                        /* Weak group failed. Reset the group. */
                        if ((errno == EINVAL || errno == EBADF) &&
@@ -2027,7 +2027,7 @@ static const struct option stat_options[] = {
                     "aggregate counts per physical processor core", AGGR_CORE),
        OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
                     "aggregate counts per thread", AGGR_THREAD),
-       OPT_UINTEGER('D', "delay", &initial_delay,
+       OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
                     "ms to wait before starting measurement after program start"),
        OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
                        "Only print computed metrics. No raw values", enable_metric_only),

diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 36efb98..91e6609 100644 (file)
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -6,6 +6,7 @@
 #include <stdio.h>
 #include "xyarray.h"
 #include "rblist.h"
+#include "perf.h"
 
 struct stats {
        double n, mean, M2;
@@ -85,14 +86,15 @@ struct runtime_stat {
 };
 
 struct perf_stat_config {
-       enum aggr_mode  aggr_mode;
-       bool            scale;
-       FILE            *output;
-       unsigned int    interval;
-       unsigned int    timeout;
-       int             times;
-       struct runtime_stat *stats;
-       int             stats_num;
+       enum aggr_mode           aggr_mode;
+       bool                     scale;
+       FILE                    *output;
+       unsigned int             interval;
+       unsigned int             timeout;
+       unsigned int             initial_delay;
+       int                      times;
+       struct runtime_stat     *stats;
+       int                      stats_num;
 };
 
 void update_stats(struct stats *stats, u64 val);