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77e16ce7d6
Switch from relying on PERFORMANCE_SCHEMA to using our own hooks for counting the time spent reading rows from tables.
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*
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Copyright (c) 2015 MariaDB Corporation Ab
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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A class for tracking time it takes to do a certain action
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*/
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class Exec_time_tracker
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{
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ulonglong count;
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ulonglong cycles;
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ulonglong last_start;
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public:
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Exec_time_tracker() : count(0), cycles(0) {}
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// interface for collecting time
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void start_tracking()
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{
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last_start= my_timer_cycles();
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}
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void stop_tracking()
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{
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ulonglong last_end= my_timer_cycles();
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count++;
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cycles += last_end - last_start;
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}
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// interface for getting the time
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ulonglong get_loops() { return count; }
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double get_time_ms()
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{
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// convert 'cycles' to milliseconds.
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return 1000 * ((double)cycles) / sys_timer_info.cycles.frequency;
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}
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};
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