Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / perf / util / stat.h

diff --git a/kernel/tools/perf/util/stat.h b/kernel/tools/perf/util/stat.h
new file mode 100644 (file)
index 0000000..5667fc3
--- /dev/null
+++ b/kernel/tools/perf/util/stat.h
@@ -0,0 +1,25 @@
+#ifndef __PERF_STATS_H
+#define __PERF_STATS_H
+
+#include <linux/types.h>
+
+struct stats
+{
+       double n, mean, M2;
+       u64 max, min;
+};
+
+void update_stats(struct stats *stats, u64 val);
+double avg_stats(struct stats *stats);
+double stddev_stats(struct stats *stats);
+double rel_stddev_stats(double stddev, double avg);
+
+static inline void init_stats(struct stats *stats)
+{
+       stats->n    = 0.0;
+       stats->mean = 0.0;
+       stats->M2   = 0.0;
+       stats->min  = (u64) -1;
+       stats->max  = 0;
+}
+#endif