X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=src%2Futils_latency.h;h=9d878dabcda3ff0d7287f8a3dc332c73b2e3171e;hp=cb56b082524c87c33f34cf7836b01851bd8176f6;hb=da11ce02eb202b3e01d3e2d1b40f248a84430973;hpb=f0d468892e1c173b226f739be48291981473b4fb

diff --git a/src/utils_latency.h b/src/utils_latency.h
index cb56b082..9d878dab 100644
--- a/src/utils_latency.h
+++ b/src/utils_latency.h
@@ -28,21 +28,36 @@
 
 #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;
 
-latency_counter_t *latency_counter_create (void);
-void latency_counter_destroy (latency_counter_t *lc);
+latency_counter_t *latency_counter_create(void);
+void latency_counter_destroy(latency_counter_t *lc);
 
-void latency_counter_add (latency_counter_t *lc, cdtime_t latency);
-void latency_counter_reset (latency_counter_t *lc);
+void latency_counter_add(latency_counter_t *lc, cdtime_t latency);
+void latency_counter_reset(latency_counter_t *lc);
 
-cdtime_t latency_counter_get_min (latency_counter_t *lc);
-cdtime_t latency_counter_get_max (latency_counter_t *lc);
-cdtime_t latency_counter_get_sum (latency_counter_t *lc);
-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);
+cdtime_t latency_counter_get_min(latency_counter_t *lc);
+cdtime_t latency_counter_get_max(latency_counter_t *lc);
+cdtime_t latency_counter_get_sum(latency_counter_t *lc);
+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);