From e748b6f4faeb84f5393e362103d29a57600ec93d Mon Sep 17 00:00:00 2001 From: Florian Forster Date: Sun, 31 Oct 2010 14:36:11 +0100 Subject: [PATCH] rrdtool plugin: Fix the "random variation" implementation. --- src/rrdtool.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/src/rrdtool.c b/src/rrdtool.c index 1e9e52a9..ca5441a8 100644 --- a/src/rrdtool.c +++ b/src/rrdtool.c @@ -109,7 +109,7 @@ static rrdcreate_config_t rrdcreate_config = * ALWAYS lock `cache_lock' first! */ static cdtime_t cache_timeout = 0; static cdtime_t cache_flush_timeout = 0; -static cdtime_t random_timeout = 1; +static cdtime_t random_timeout = TIME_T_TO_CDTIME_T (1); static cdtime_t cache_flush_last; static c_avl_tree_t *cache = NULL; static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER; @@ -674,9 +674,6 @@ static int64_t rrd_get_random_variation (void) if (negative) ret *= -1; - DEBUG ("rrdtool plugin: random_variation = %.3f s", - (negative ? -1.0 : 1.0) * dbl_timeout * rand_fact); - return (ret); } /* int64_t rrd_get_random_variation */ @@ -709,7 +706,7 @@ static int rrd_cache_insert (const char *filename, rc->values = NULL; rc->first_value = 0; rc->last_value = 0; - rc->random_variation = 0; + rc->random_variation = rrd_get_random_variation (); rc->flags = FLAG_NONE; new_rc = 1; } @@ -780,7 +777,7 @@ static int rrd_cache_insert (const char *filename, filename, rc->values_num, CDTIME_T_TO_DOUBLE (rc->last_value - rc->first_value)); - if ((rc->last_value + rc->random_variation - rc->first_value) >= cache_timeout) + if ((rc->last_value - rc->first_value) >= (cache_timeout + rc->random_variation)) { /* XXX: If you need to lock both, cache_lock and queue_lock, at * the same time, ALWAYS lock `cache_lock' first! */ @@ -1101,7 +1098,7 @@ static int rrd_config (const char *key, const char *value) } else { - cache_timeout = DOUBLE_TO_CDTIME_T (tmp); + random_timeout = DOUBLE_TO_CDTIME_T (tmp); } } else -- 2.11.0