X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Futils_latency.h;h=8fdf02495a3072e301b30b29e48deeb18f9350a1;hb=db8b1cda4841f45af22d149c6bfc575e79289f75;hp=9930b7235368ddd368bd06c7c8c99a20ea267bcc;hpb=0a63e4493d92f7d739a1849bc65d4e971b047004;p=collectd.git

diff --git a/src/utils_latency.h b/src/utils_latency.h
index 9930b723..8fdf0249 100644
--- a/src/utils_latency.h
+++ b/src/utils_latency.h
@@ -25,12 +25,17 @@
  **/
 
 #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 ();
+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);
@@ -44,4 +49,18 @@ cdtime_t latency_counter_get_average (latency_counter_t *lc);
 cdtime_t latency_counter_get_percentile (latency_counter_t *lc,
     double percent);
 
+/*
+ * 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);
+
 /* vim: set sw=2 sts=2 et : */