X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=src%2Futils_latency.h;h=9d878dabcda3ff0d7287f8a3dc332c73b2e3171e;hp=7c339c6068e814f90800cd9adc2c294e2f30febf;hb=da11ce02eb202b3e01d3e2d1b40f248a84430973;hpb=2079ee1517e34de372f58e7e2267ad5c71a8a41f

diff --git a/src/utils_latency.h b/src/utils_latency.h
index 7c339c60..9d878dab 100644
--- 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);