perf stat: Add id into perf_stat struct

We need fast way to identify evsel as transaction event for shadow
counters computation. Currently we are using possition (in evlist) based
way.

Adding 'id' into 'struct perf_stat' so it can carry transaction event ID
and we can use it for shadow counters computations.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20150604135055.GB23625@krava.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 52 insertions, 5 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index fd577f725d23..a6ae1007f1f9 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -147,10 +147,6 @@ static int			(*aggr_get_id)(struct cpu_map *m, int cpu);
 
 static volatile int done = 0;
 
-struct perf_stat {
-        struct stats      res_stats[3];
-};
-
 static inline void diff_timespec(struct timespec *r, struct timespec *a,
                                  struct timespec *b)
 {
@@ -180,6 +176,8 @@ static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
 
         for (i = 0; i < 3; i++)
                 init_stats(&ps->res_stats[i]);
+
+        perf_stat_evsel_id_init(evsel);
 }
 
 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 6506b3dfb605..8e9f6bb7581b 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -1,6 +1,6 @@
 #include <math.h>
-
 #include "stat.h"
+#include "evsel.h"
 
 void update_stats(struct stats *stats, u64 val)
 {
@@ -61,3 +61,32 @@ double rel_stddev_stats(double stddev, double avg)
 
         return pct;
 }
+
+bool __perf_evsel_stat__is(struct perf_evsel *evsel,
+                           enum perf_stat_evsel_id id)
+{
+        struct perf_stat *ps = evsel->priv;
+
+        return ps->id == id;
+}
+
+#define ID(id, name) [PERF_STAT_EVSEL_ID__##id] = #name
+static const char *id_str[PERF_STAT_EVSEL_ID__MAX] = {
+        ID(NONE, x),
+};
+#undef ID
+
+void perf_stat_evsel_id_init(struct perf_evsel *evsel)
+{
+        struct perf_stat *ps = evsel->priv;
+        int i;
+
+        /* ps->id is 0 hence PERF_STAT_EVSEL_ID__NONE by default */
+
+        for (i = 0; i < PERF_STAT_EVSEL_ID__MAX; i++) {
+                if (!strcmp(perf_evsel__name(evsel), id_str[i])) {
+                        ps->id = i;
+                        break;
+                }
+        }
+}
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 5667fc3e39cf..f4136cfd3cc9 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -9,6 +9,16 @@ struct stats
         u64 max, min;
 };
 
+enum perf_stat_evsel_id {
+        PERF_STAT_EVSEL_ID__NONE = 0,
+        PERF_STAT_EVSEL_ID__MAX,
+};
+
+struct perf_stat {
+        struct stats            res_stats[3];
+        enum perf_stat_evsel_id id;
+};
+
 void update_stats(struct stats *stats, u64 val);
 double avg_stats(struct stats *stats);
 double stddev_stats(struct stats *stats);
@@ -22,4 +32,14 @@ static inline void init_stats(struct stats *stats)
         stats->min  = (u64) -1;
         stats->max  = 0;
 }
+
+struct perf_evsel;
+bool __perf_evsel_stat__is(struct perf_evsel *evsel,
+                           enum perf_stat_evsel_id id);
+
+#define perf_stat_evsel__is(evsel, id) \
+        __perf_evsel_stat__is(evsel, PERF_STAT_EVSEL_ID__ ## id)
+
+void perf_stat_evsel_id_init(struct perf_evsel *evsel);
+
 #endif