perf stat: Factor our shadow stats

Create update_shadow_stats() which is then used in both read_counter_aggr()
and read_counter().

This not only simplifies the code but also fixes a bug: HW_CACHE_REFERENCES
was not updated in read_counter().

Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-9uc55z3g88r47exde7zxjm6p@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 19 insertions, 14 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 0de3a2002f49..e5e82f62c784 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -194,6 +194,23 @@ static inline int nsec_counter(struct perf_evsel *evsel)
 }
 
 /*
+ * Update various tracking values we maintain to print
+ * more semantic information such as miss/hit ratios,
+ * instruction rates, etc:
+ */
+static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
+{
+        if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
+                update_stats(&runtime_nsecs_stats[0], count[0]);
+        else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
+                update_stats(&runtime_cycles_stats[0], count[0]);
+        else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
+                update_stats(&runtime_branches_stats[0], count[0]);
+        else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
+                update_stats(&runtime_cacherefs_stats[0], count[0]);
+}
+
+/*
  * Read out the results of a single counter:
  * aggregate counts across CPUs in system-wide mode
  */
@@ -218,14 +235,7 @@ static int read_counter_aggr(struct perf_evsel *counter)
         /*
          * Save the full runtime - to allow normalization during printout:
          */
-        if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
-                update_stats(&runtime_nsecs_stats[0], count[0]);
-        else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
-                update_stats(&runtime_cycles_stats[0], count[0]);
-        else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
-                update_stats(&runtime_branches_stats[0], count[0]);
-        else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
-                update_stats(&runtime_cacherefs_stats[0], count[0]);
+        update_shadow_stats(counter, count);
 
         return 0;
 }
@@ -245,12 +255,7 @@ static int read_counter(struct perf_evsel *counter)
 
                 count = counter->counts->cpu[cpu].values;
 
-                if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
-                        update_stats(&runtime_nsecs_stats[cpu], count[0]);
-                if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
-                        update_stats(&runtime_cycles_stats[cpu], count[0]);
-                if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
-                        update_stats(&runtime_branches_stats[cpu], count[0]);
+                update_shadow_stats(counter, count);
         }
 
         return 0;