perf stat: Add 'identifier' flag to 'struct perf_stat_config'

Add 'identifier' flag to 'struct perf_stat_config' to carry the info
whether to use PERF_SAMPLE_IDENTIFIER for events.

This makes create_perf_stat_counter() independent.

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/20180830063252.23729-6-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 4778955..48c88f5 100644 (file)
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -261,16 +261,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel,
         */
        attr->sample_period = 0;
 
-       /*
-        * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
-        * while avoiding that older tools show confusing messages.
-        *
-        * However for pipe sessions we need to keep it zero,
-        * because script's perf_evsel__check_attr is triggered
-        * by attr->sample_type != 0, and we can't run it on
-        * stat sessions.
-        */
-       if (!(STAT_RECORD && perf_stat.data.is_pipe))
+       if (config->identifier)
                attr->sample_type = PERF_SAMPLE_IDENTIFIER;
 
        /*
@@ -3065,6 +3056,17 @@ int cmd_stat(int argc, const char **argv)
                goto out;
 
        /*
+        * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
+        * while avoiding that older tools show confusing messages.
+        *
+        * However for pipe sessions we need to keep it zero,
+        * because script's perf_evsel__check_attr is triggered
+        * by attr->sample_type != 0, and we can't run it on
+        * stat sessions.
+        */
+       stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
+
+       /*
         * 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

diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 53b2415..918cde0 100644 (file)
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -89,6 +89,7 @@ struct perf_stat_config {
        enum aggr_mode           aggr_mode;
        bool                     scale;
        bool                     no_inherit;
+       bool                     identifier;
        FILE                    *output;
        unsigned int             interval;
        unsigned int             timeout;