mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 04:53:01 +01:00
119 lines
3.6 KiB
C++
119 lines
3.6 KiB
C++
/* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; version 2 of the License.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
|
|
|
|
/**
|
|
@file storage/perfschema/pfs_timer.cc
|
|
Performance schema timers (implementation).
|
|
*/
|
|
|
|
#include "my_global.h"
|
|
#include "pfs_timer.h"
|
|
#include "my_rdtsc.h"
|
|
|
|
enum_timer_name wait_timer= TIMER_NAME_CYCLE;
|
|
MY_TIMER_INFO pfs_timer_info;
|
|
|
|
static ulonglong cycle_v0;
|
|
static ulonglong nanosec_v0;
|
|
static ulonglong microsec_v0;
|
|
static ulonglong millisec_v0;
|
|
static ulonglong tick_v0;
|
|
|
|
static ulong cycle_to_pico; /* 1000 at 1 GHz, 333 at 3GHz, 250 at 4GHz */
|
|
static ulong nanosec_to_pico; /* In theory, 1 000 */
|
|
static ulong microsec_to_pico; /* In theory, 1 000 000 */
|
|
static ulong millisec_to_pico; /* In theory, 1 000 000 000, fits in uint32 */
|
|
static ulonglong tick_to_pico; /* 1e10 at 100 Hz, 1.666e10 at 60 Hz */
|
|
|
|
static inline ulong round_to_ulong(double value)
|
|
{
|
|
return (ulong) (value + 0.5);
|
|
}
|
|
|
|
static inline ulonglong round_to_ulonglong(double value)
|
|
{
|
|
return (ulonglong) (value + 0.5);
|
|
}
|
|
|
|
void init_timers(void)
|
|
{
|
|
double pico_frequency= 1.0e12;
|
|
|
|
my_timer_init(&pfs_timer_info);
|
|
|
|
cycle_v0= my_timer_cycles();
|
|
nanosec_v0= my_timer_nanoseconds();
|
|
microsec_v0= my_timer_microseconds();
|
|
millisec_v0= my_timer_milliseconds();
|
|
tick_v0= my_timer_ticks();
|
|
|
|
if (pfs_timer_info.cycles.frequency > 0)
|
|
cycle_to_pico= round_to_ulong(pico_frequency/
|
|
(double)pfs_timer_info.cycles.frequency);
|
|
else
|
|
cycle_to_pico= 0;
|
|
|
|
if (pfs_timer_info.nanoseconds.frequency > 0)
|
|
nanosec_to_pico= round_to_ulong(pico_frequency/
|
|
(double)pfs_timer_info.nanoseconds.frequency);
|
|
else
|
|
nanosec_to_pico= 0;
|
|
|
|
if (pfs_timer_info.microseconds.frequency > 0)
|
|
microsec_to_pico= round_to_ulong(pico_frequency/
|
|
(double)pfs_timer_info.microseconds.frequency);
|
|
else
|
|
microsec_to_pico= 0;
|
|
|
|
if (pfs_timer_info.milliseconds.frequency > 0)
|
|
millisec_to_pico= round_to_ulong(pico_frequency/
|
|
(double)pfs_timer_info.milliseconds.frequency);
|
|
else
|
|
millisec_to_pico= 0;
|
|
|
|
if (pfs_timer_info.ticks.frequency > 0)
|
|
tick_to_pico= round_to_ulonglong(pico_frequency/
|
|
(double)pfs_timer_info.ticks.frequency);
|
|
else
|
|
tick_to_pico= 0;
|
|
}
|
|
|
|
ulonglong get_timer_value(enum_timer_name timer_name)
|
|
{
|
|
ulonglong result;
|
|
|
|
switch (timer_name) {
|
|
case TIMER_NAME_CYCLE:
|
|
result= (my_timer_cycles() - cycle_v0) * cycle_to_pico;
|
|
break;
|
|
case TIMER_NAME_NANOSEC:
|
|
result= (my_timer_nanoseconds() - nanosec_v0) * nanosec_to_pico;
|
|
break;
|
|
case TIMER_NAME_MICROSEC:
|
|
result= (my_timer_microseconds() - microsec_v0) * microsec_to_pico;
|
|
break;
|
|
case TIMER_NAME_MILLISEC:
|
|
result= (my_timer_milliseconds() - millisec_v0) * millisec_to_pico;
|
|
break;
|
|
case TIMER_NAME_TICK:
|
|
result= (my_timer_ticks() - tick_v0) * tick_to_pico;
|
|
break;
|
|
default:
|
|
result= 0;
|
|
DBUG_ASSERT(false);
|
|
}
|
|
return result;
|
|
}
|
|
|