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/* vim:ts=8:sts=8:sw=4:noai:noexpandtab
*
* histograms.
*
* Copyright (c) 2009 Miru Limited.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if !defined (__PGM_IMPL_FRAMEWORK_H_INSIDE__) && !defined (PGM_COMPILATION)
# error "Only <framework.h> can be included directly."
#endif
#ifndef __PGM_IMPL_HISTOGRAM_H__
#define __PGM_IMPL_HISTOGRAM_H__
#include <pgm/types.h>
#include <pgm/time.h>
#include <impl/slist.h>
#include <impl/string.h>
PGM_BEGIN_DECLS
typedef int pgm_sample_t;
typedef int pgm_count_t;
struct pgm_sample_set_t {
pgm_count_t* counts;
unsigned counts_len;
int64_t sum;
int64_t square_sum;
};
typedef struct pgm_sample_set_t pgm_sample_set_t;
struct pgm_histogram_t {
const char* restrict histogram_name;
unsigned bucket_count;
pgm_sample_t declared_min;
pgm_sample_t declared_max;
pgm_sample_t* restrict ranges;
pgm_sample_set_t sample;
bool is_registered;
pgm_slist_t histograms_link;
};
typedef struct pgm_histogram_t pgm_histogram_t;
#define PGM_HISTOGRAM_DEFINE(name, minimum, maximum, count) \
static pgm_count_t counts[ (count) ]; \
static pgm_sample_t ranges[ (count) + 1 ]; \
static pgm_histogram_t counter = { \
.histogram_name = (name), \
.bucket_count = (count), \
.declared_min = (minimum), \
.declared_max = (maximum), \
.ranges = ranges, \
.sample = { \
.counts = counts, \
.counts_len = (count), \
.sum = 0, \
.square_sum = 0 \
}, \
.is_registered = FALSE \
}
#ifdef CONFIG_HISTOGRAMS
# define PGM_HISTOGRAM_TIMES(name, sample) do { \
PGM_HISTOGRAM_DEFINE(name, pgm_msecs(1), pgm_secs(10), 50); \
if (!counter.is_registered) { \
memset (counts, 0, sizeof(counts)); \
memset (ranges, 0, sizeof(ranges)); \
pgm_histogram_init (&counter); \
} \
pgm_histogram_add_time (&counter, sample); \
} while (0)
# define PGM_HISTOGRAM_COUNTS(name, sample) do { \
PGM_HISTOGRAM_DEFINE(name, 1, 1000000, 50); \
if (!counter.is_registered) { \
memset (counts, 0, sizeof(counts)); \
memset (ranges, 0, sizeof(ranges)); \
pgm_histogram_init (&counter); \
} \
pgm_histogram_add (&counter, (sample)); \
} while (0)
#else /* !CONFIG_HISTOGRAMS */
# define PGM_HISTOGRAM_TIMES(name, sample)
# define PGM_HISTOGRAM_COUNTS(name, sample)
#endif /* !CONFIG_HISTOGRAMS */
extern pgm_slist_t* pgm_histograms;
void pgm_histogram_init (pgm_histogram_t*);
void pgm_histogram_add (pgm_histogram_t*, int);
void pgm_histogram_write_html_graph_all (pgm_string_t*);
static inline
void
pgm_histogram_add_time (
pgm_histogram_t*const histogram,
pgm_time_t sample_time
)
{
pgm_histogram_add (histogram, (int)pgm_to_msecs (sample_time));
}
PGM_END_DECLS
#endif /* __PGM_IMPL_HISTOGRAM_H__ */
/* eof */
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