1 files changed, 40 insertions, 0 deletions
diff --git a/src/tools/rbd_mirror/image_replayer/TimeRollingMean.h b/src/tools/rbd_mirror/image_replayer/TimeRollingMean.h
new file mode 100644
index 000000000..139ef893f
--- /dev/null
+++ b/src/tools/rbd_mirror/image_replayer/TimeRollingMean.h
@@ -0,0 +1,40 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef RBD_MIRROR_IMAGE_REPLAYER_TIME_ROLLING_MEAN_H
+#define RBD_MIRROR_IMAGE_REPLAYER_TIME_ROLLING_MEAN_H
+
+#include "include/utime.h"
+#include <boost/accumulators/accumulators.hpp>
+#include <boost/accumulators/statistics/stats.hpp>
+#include <boost/accumulators/statistics/rolling_mean.hpp>
+
+namespace rbd {
+namespace mirror {
+namespace image_replayer {
+
+class TimeRollingMean {
+public:
+
+  void operator()(uint32_t value);
+
+  double get_average() const;
+
+private:
+  typedef boost::accumulators::accumulator_set<
+    uint64_t, boost::accumulators::stats<
+      boost::accumulators::tag::rolling_mean>> RollingMean;
+
+  utime_t m_last_time;
+  uint64_t m_sum = 0;
+
+  RollingMean m_rolling_mean{
+    boost::accumulators::tag::rolling_window::window_size = 30};
+
+};
+
+} // namespace image_replayer
+} // namespace mirror
+} // namespace rbd
+
+#endif // RBD_MIRROR_IMAGE_REPLAYER_TIME_ROLLING_MEAN_H