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/*
Copyright (c) 2015 MariaDB Corporation Ab
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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
A class for tracking time it takes to do a certain action
*/
class Exec_time_tracker
{
protected:
ulonglong count;
ulonglong cycles;
ulonglong last_start;
public:
Exec_time_tracker() : count(0), cycles(0) {}
// interface for collecting time
void start_tracking()
{
last_start= my_timer_cycles();
}
void stop_tracking()
{
count++;
cycles += my_timer_cycles()- last_start;
}
// interface for getting the time
ulonglong get_loops() { return count; }
double get_time_ms()
{
// convert 'cycles' to milliseconds.
return 1000 * ((double)cycles) / sys_timer_info.cycles.frequency;
}
};
/*
A class for counting certain actions (in all queries), and optionally
collecting the timings (in ANALYZE queries).
*/
class Time_and_counter_tracker: public Exec_time_tracker
{
public:
const bool timed;
Time_and_counter_tracker(bool timed_arg) : timed(timed_arg)
{}
/* Loops are counted in both ANALYZE and regular queries, as this is cheap */
void incr_loops() { count++; }
/*
Unlike Exec_time_tracker::stop_tracking, we don't increase loops.
*/
void stop_tracking()
{
cycles += my_timer_cycles()- last_start;
}
};
#define ANALYZE_START_TRACKING(tracker) \
{ \
(tracker)->incr_loops(); \
if (unlikely((tracker)->timed)) \
{ (tracker)->start_tracking(); } \
}
#define ANALYZE_STOP_TRACKING(tracker) \
if (unlikely((tracker)->timed)) \
{ (tracker)->stop_tracking(); }
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