MySQL 8.0.29
Source Code Documentation
pfs_histogram.h
Go to the documentation of this file.
1/* Copyright (c) 2016, 2022, Oracle and/or its affiliates.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
6
7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22
23#ifndef PFS_HISTOGRAM_H
24#define PFS_HISTOGRAM_H
25
26#include <atomic>
27#include "my_compiler.h"
28#include "my_inttypes.h"
29
30/**
31 @file storage/perfschema/pfs_histogram.h
32*/
33
34/** Number of buckets used in histograms. */
35#define NUMBER_OF_BUCKETS 450
36
38 public:
39 void reset();
40
41 void increment_bucket(uint bucket_index) { m_bucket[bucket_index]++; }
42
43 ulonglong read_bucket(uint bucket_index) { return m_bucket[bucket_index]; }
44
45 private:
46 std::atomic<ulonglong> m_bucket[NUMBER_OF_BUCKETS];
47};
48
51
52 void init();
53};
54
56
57#endif
Header for compiler-dependent features.
Some integer typedefs for easier portability.
unsigned long long int ulonglong
Definition: my_inttypes.h:55
struct PFS_histogram_timers g_histogram_pico_timers
Timer values used in histograms.
Definition: pfs_histogram.cc:57
#define NUMBER_OF_BUCKETS
Number of buckets used in histograms.
Definition: pfs_histogram.h:35
Definition: pfs_histogram.h:49
void init()
Definition: pfs_histogram.cc:67
ulonglong m_bucket_timer[NUMBER_OF_BUCKETS+1]
Definition: pfs_histogram.h:50
Definition: pfs_histogram.h:37
std::atomic< ulonglong > m_bucket[NUMBER_OF_BUCKETS]
Definition: pfs_histogram.h:46
ulonglong read_bucket(uint bucket_index)
Definition: pfs_histogram.h:43
void reset()
Definition: pfs_histogram.cc:59
void increment_bucket(uint bucket_index)
Definition: pfs_histogram.h:41
unsigned int uint
Definition: uca-dump.cc:29