Merge branch 'collectd-5.7' into collectd-5.8

[collectd.git] / src / utils_latency.h

diff --git a/src/utils_latency.h b/src/utils_latency.h
index 7c339c6..9d878da 100644 (file)
--- a/src/utils_latency.h
+++ b/src/utils_latency.h
@@ -28,6 +28,10 @@
 
 #include "utils_time.h"
 
+#ifndef HISTOGRAM_NUM_BINS
+#define HISTOGRAM_NUM_BINS 1000
+#endif
+
 struct latency_counter_s;
 typedef struct latency_counter_s latency_counter_t;
 
@@ -44,4 +48,16 @@ size_t latency_counter_get_num(latency_counter_t *lc);
 cdtime_t latency_counter_get_average(latency_counter_t *lc);
 cdtime_t latency_counter_get_percentile(latency_counter_t *lc, double percent);
 
-/* vim: set sw=2 sts=2 et : */
+/*
+ * NAME
+ *  latency_counter_get_rate(counter,lower,upper,now)
+ *
+ * DESCRIPTION
+ *   Calculates rate of latency values fall within requested interval.
+ *   Interval specified as (lower,upper], i.e. the lower boundary is exclusive,
+ *   the upper boundary is inclusive.
+ *   When lower is zero, then the interval is (0, upper].
+ *   When upper is zero, then the interval is (lower, infinity).
+ */
+double latency_counter_get_rate(const latency_counter_t *lc, cdtime_t lower,
+                                cdtime_t upper, const cdtime_t now);