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 2cfa71b..9d878da 100644 (file)
--- a/src/utils_latency.h
+++ b/src/utils_latency.h
@@ -25,23 +25,39 @@
  **/
 
 #include "collectd.h"
+
 #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);