perf stat: Scale values by unit before metrics

Scale values by unit before passing them to the metrics printing
functions.  This is needed for TopDown, because it needs to scale the
slots correctly by pipeline width / SMTness.

For existing metrics it shouldn't make any difference, as those
generally use events that don't have any units.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1462489447-31832-8-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/stat.c

@@ -307,6 +307,7 @@ int perf_stat_process_counter(struct perf_stat_config *config,
 	struct perf_counts_values *aggr = &counter->counts->aggr;
 	struct perf_stat_evsel *ps = counter->priv;
 	u64 *count = counter->counts->aggr.values;
+	u64 val;
 	int i, ret;
 
 	aggr->val = aggr->ena = aggr->run = 0;
@@ -346,7 +347,8 @@ int perf_stat_process_counter(struct perf_stat_config *config,
 	/*
 	 * Save the full runtime - to allow normalization during printout:
 	 */
-	perf_stat__update_shadow_stats(counter, count, 0);
+	val = counter->scale * *count;
+	perf_stat__update_shadow_stats(counter, &val, 0);
 
 	return 0;
 }