/**
* collectd - src/rrdtool.c
- * Copyright (C) 2006-2008 Florian octo Forster
+ * Copyright (C) 2006-2013 Florian octo Forster
* Copyright (C) 2008-2008 Sebastian Harl
* Copyright (C) 2009 Mariusz Gronczewski
*
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
- * Florian octo Forster <octo at verplant.org>
+ * Florian octo Forster <octo at collectd.org>
* Sebastian Harl <sh at tokkee.org>
* Mariusz Gronczewski <xani666 at gmail.com>
**/
#include "plugin.h"
#include "common.h"
#include "utils_avltree.h"
+#include "utils_random.h"
#include "utils_rrdcreate.h"
#include <rrd.h>
{
"CacheTimeout",
"CacheFlush",
+ "CreateFilesAsync",
"DataDir",
"StepSize",
"HeartBeat",
/* timespans_num = */ 0,
/* consolidation_functions = */ NULL,
- /* consolidation_functions_num = */ 0
+ /* consolidation_functions_num = */ 0,
+
+ /* async = */ 0
};
/* XXX: If you need to lock both, cache_lock and queue_lock, at the same time,
* 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;
if (status != 0)
{
WARNING ("rrdtool plugin: rrd_update_r failed: %s: %s",
- argv[1], rrd_get_error ());
+ filename, rrd_get_error ());
}
sfree (new_argv);
pthread_mutex_lock (&queue_lock);
/* Wait for values to arrive */
- while (true)
+ while (42)
{
struct timespec ts_wait;
&ts_wait);
if (status == ETIMEDOUT)
break;
- } /* while (true) */
+ } /* while (42) */
/* XXX: If you need to lock both, cache_lock and queue_lock, at
* the same time, ALWAYS lock `cache_lock' first! */
return (0);
} /* int rrd_queue_dequeue */
-static void rrd_cache_flush (int timeout)
+/* XXX: You must hold "cache_lock" when calling this function! */
+static void rrd_cache_flush (cdtime_t timeout)
{
rrd_cache_t *rc;
- time_t now;
+ cdtime_t now;
char **keys = NULL;
int keys_num = 0;
c_avl_iterator_t *iter;
int i;
- DEBUG ("rrdtool plugin: Flushing cache, timeout = %i", timeout);
+ DEBUG ("rrdtool plugin: Flushing cache, timeout = %.3f",
+ CDTIME_T_TO_DOUBLE (timeout));
- now = time (NULL);
+ now = cdtime ();
+ timeout = TIME_T_TO_CDTIME_T (timeout);
/* Build a list of entries to be flushed */
iter = c_avl_get_iterator (cache);
{
if (rc->flags != FLAG_NONE)
continue;
- else if ((now - rc->first_value) < timeout)
+ /* timeout == 0 => flush everything */
+ else if ((timeout != 0)
+ && ((now - rc->first_value) < timeout))
continue;
else if (rc->values_num > 0)
{
cache_flush_last = now;
} /* void rrd_cache_flush */
-static int rrd_cache_flush_identifier (int timeout, const char *identifier)
+static int rrd_cache_flush_identifier (cdtime_t timeout,
+ const char *identifier)
{
rrd_cache_t *rc;
- time_t now;
+ cdtime_t now;
int status;
char key[2048];
return (0);
}
- now = time (NULL);
+ now = cdtime ();
if (datadir == NULL)
snprintf (key, sizeof (key), "%s.rrd",
static int64_t rrd_get_random_variation (void)
{
- double dbl_timeout;
- cdtime_t ctm_timeout;
- double rand_fact;
- _Bool negative;
- int64_t ret;
+ long min;
+ long max;
if (random_timeout <= 0)
return (0);
- /* This seems a bit complicated, but "random_timeout" is likely larger than
- * RAND_MAX, so we can't simply use modulo here. */
- dbl_timeout = CDTIME_T_TO_DOUBLE (random_timeout);
- rand_fact = ((double) random ())
- / ((double) RAND_MAX);
- negative = (_Bool) (random () % 2);
-
- ctm_timeout = DOUBLE_TO_CDTIME_T (dbl_timeout * rand_fact);
-
- ret = (int64_t) ctm_timeout;
- if (negative)
- ret *= -1;
+ /* Assure that "cache_timeout + random_variation" is never negative. */
+ if (random_timeout > cache_timeout)
+ {
+ INFO ("rrdtool plugin: Adjusting \"RandomTimeout\" to %.3f seconds.",
+ CDTIME_T_TO_DOUBLE (cache_timeout));
+ random_timeout = cache_timeout;
+ }
- DEBUG ("rrdtool plugin: random_variation = %.3f s",
- (negative ? -1.0 : 1.0) * dbl_timeout * rand_fact);
+ max = (long) (random_timeout / 2);
+ min = max - ((long) random_timeout);
- return (ret);
+ return ((int64_t) cdrand_range (min, max));
} /* int64_t rrd_get_random_variation */
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;
}
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! */
ds, vl, &rrdcreate_config);
if (status != 0)
return (-1);
+ else if (rrdcreate_config.async)
+ return (0);
}
else
{
return (status);
} /* int rrd_write */
-static int rrd_flush (int timeout, const char *identifier,
- user_data_t __attribute__((unused)) *user_data)
+static int rrd_flush (cdtime_t timeout, const char *identifier,
+ __attribute__((unused)) user_data_t *user_data)
{
pthread_mutex_lock (&cache_lock);
}
else if (strcasecmp ("StepSize", key) == 0)
{
- int temp = atoi (value);
+ unsigned long temp = strtoul (value, NULL, 0);
if (temp > 0)
rrdcreate_config.stepsize = temp;
}
if (temp > 0)
rrdcreate_config.heartbeat = temp;
}
+ else if (strcasecmp ("CreateFilesAsync", key) == 0)
+ {
+ if (IS_TRUE (value))
+ rrdcreate_config.async = 1;
+ else
+ rrdcreate_config.async = 0;
+ }
else if (strcasecmp ("RRARows", key) == 0)
{
int tmp = atoi (value);
}
else
{
- cache_timeout = DOUBLE_TO_CDTIME_T (tmp);
+ random_timeout = DOUBLE_TO_CDTIME_T (tmp);
}
}
else
static int rrd_shutdown (void)
{
pthread_mutex_lock (&cache_lock);
- rrd_cache_flush (-1);
+ rrd_cache_flush (0);
pthread_mutex_unlock (&cache_lock);
pthread_mutex_lock (&queue_lock);
return (0);
init_once = 1;
- if (rrdcreate_config.stepsize < 0)
- rrdcreate_config.stepsize = 0;
if (rrdcreate_config.heartbeat <= 0)
rrdcreate_config.heartbeat = 2 * rrdcreate_config.stepsize;
- if ((rrdcreate_config.heartbeat > 0)
- && (rrdcreate_config.heartbeat < interval_g))
- WARNING ("rrdtool plugin: Your `heartbeat' is "
- "smaller than your `interval'. This will "
- "likely cause problems.");
- else if ((rrdcreate_config.stepsize > 0)
- && (rrdcreate_config.stepsize < interval_g))
- WARNING ("rrdtool plugin: Your `stepsize' is "
- "smaller than your `interval'. This will "
- "create needlessly big RRD-files.");
-
/* Set the cache up */
pthread_mutex_lock (&cache_lock);
return (-1);
}
- cache_flush_last = time (NULL);
- if (cache_timeout < 2)
+ cache_flush_last = cdtime ();
+ if (cache_timeout == 0)
{
- cache_timeout = 0;
cache_flush_timeout = 0;
}
else if (cache_flush_timeout < cache_timeout)
pthread_mutex_unlock (&cache_lock);
- status = pthread_create (&queue_thread, /* attr = */ NULL,
+ status = plugin_thread_create (&queue_thread, /* attr = */ NULL,
rrd_queue_thread, /* args = */ NULL);
if (status != 0)
{
}
queue_thread_running = 1;
- DEBUG ("rrdtool plugin: rrd_init: datadir = %s; stepsize = %i;"
+ DEBUG ("rrdtool plugin: rrd_init: datadir = %s; stepsize = %lu;"
" heartbeat = %i; rrarows = %i; xff = %lf;",
(datadir == NULL) ? "(null)" : datadir,
rrdcreate_config.stepsize,
projects / collectd.git / blobdiff