perf stat: Use perf_evsel__read_cb in read_counter

Replacing __perf_evsel__read_on_cpu function with perf_evsel__read_cb
function. The read_cb callback will be used later for global aggregation
counter values as well.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1416562275-12404-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 21 insertions, 6 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 055ce9232c9e..9cc0db1d7f06 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -388,6 +388,26 @@ static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 }
 
+static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
+                   struct perf_counts_values *count)
+{
+        switch (aggr_mode) {
+        case AGGR_CORE:
+        case AGGR_SOCKET:
+        case AGGR_NONE:
+                perf_evsel__compute_deltas(evsel, cpu, count);
+                perf_counts_values__scale(count, scale, NULL);
+                evsel->counts->cpu[cpu] = *count;
+                update_shadow_stats(evsel, count->values);
+                break;
+        case AGGR_GLOBAL:
+        default:
+                break;
+        }
+
+        return 0;
+}
+
 /*
  * Read out the results of a single counter:
  * aggregate counts across CPUs in system-wide mode
@@ -424,16 +444,11 @@ static int read_counter_aggr(struct perf_evsel *counter)
  */
 static int read_counter(struct perf_evsel *counter)
 {
-        u64 *count;
         int cpu;
 
         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
-                if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
+                if (perf_evsel__read_cb(counter, cpu, 0, read_cb))
                         return -1;
-
-                count = counter->counts->cpu[cpu].values;
-
-                update_shadow_stats(counter, count);
         }
 
         return 0;