mirror of
https://github.com/EQEmu/Server.git
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7ab909ee47
- License was intended to be GPLv3 per earlier commit of GPLv3 LICENSE FILE - This is confirmed by the inclusion of libraries that are incompatible with GPLv2 - This is also confirmed by KLS and the agreement of KLS's predecessors - Added GPLv3 license headers to the compilable source files - Removed Folly licensing in strings.h since the string functions do not match the Folly functions and are standard functions - this must have been left over from previous implementations - Removed individual contributor license headers since the project has been under the "developer" mantle for many years - Removed comments on files that were previously automatically generated since they've been manually modified multiple times and there are no automatic scripts referencing them (removed in 2023)
168 lines
3.2 KiB
C++
168 lines
3.2 KiB
C++
/* EQEmu: EQEmulator
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Copyright (C) 2001-2026 EQEmu Development Team
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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; either version 3 of the License, or
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(at your option) any later version.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "rdtsc.h"
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#include "common/types.h"
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#ifdef _WINDOWS
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#include <sys/timeb.h>
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#include "common/timer.h"
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#else
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#include <unistd.h>
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#include <sys/time.h>
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#endif
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#ifdef i386
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#define USE_RDTSC
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#endif
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bool RDTSC_Timer::_inited = false;
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int64 RDTSC_Timer::_ticsperms = 0;
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RDTSC_Timer::RDTSC_Timer() {
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if(!_inited) {
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//find our clock rate
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RDTSC_Timer::init();
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}
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_start = 0;
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_end = 0;
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}
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RDTSC_Timer::RDTSC_Timer(bool start_it) {
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if(!_inited) {
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//find our clock rate
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RDTSC_Timer::init();
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}
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if(start_it)
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start();
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else {
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_start = 0;
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_end = 0;
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}
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}
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int64 RDTSC_Timer::rdtsc() {
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int64 res = 0;
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#ifdef USE_RDTSC
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#ifndef WIN64
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#ifdef WIN32
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//untested!
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unsigned long highw, loww;
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__asm {
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push eax
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push edx
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rdtsc
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mov highw, eax
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mov loww, edx
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pop edx
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pop eax
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}
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res = ((int64)highw)<<32 | loww;
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#else
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//gnu version
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__asm__ __volatile__ ("rdtsc" : "=A" (res));
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#endif
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#else
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//fall back to get time of day
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timeval t;
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gettimeofday(&t, nullptr);
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res = ((int64)t.tv_sec) * 1000 + t.tv_usec;
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#endif
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#endif
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return(res);
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}
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void RDTSC_Timer::init() {
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#ifdef USE_RDTSC
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int64 before, after, sum;
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int r;
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sum = 0;
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// run an average to increase accuracy of clock rate
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for(r = 0; r < CALIBRATE_LOOPS; r++) {
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before = rdtsc();
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//sleep a know duration to figure out clock rate
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#ifdef _WINDOWS
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Sleep(SLEEP_TIME);
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#else
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usleep(SLEEP_TIME * 1000); //ms * 1000
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#endif
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after = rdtsc();
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sum += after - before;
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}
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//ticks per sleep / ms per sleep
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_ticsperms = (sum / CALIBRATE_LOOPS) / SLEEP_TIME;
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#else
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//if using gettimeofday, this is fixed at 1000
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_ticsperms = 1000;
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#endif
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// printf("Tics per milisecond: %llu \n", _ticsperms);
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_inited = true; //only want to do this once
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}
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//start the timer
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void RDTSC_Timer::start() {
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_start = rdtsc();
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_end = 0;
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}
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//stop the timer
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void RDTSC_Timer::stop() {
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_end = rdtsc();
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}
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//calculate the elapsed duration
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double RDTSC_Timer::getDuration() {
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return(((double)(getTicks())) / double(_ticsperms));
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}
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RDTSC_Collector::RDTSC_Collector() : RDTSC_Timer() {
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reset();
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}
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RDTSC_Collector::RDTSC_Collector(bool start_it) : RDTSC_Timer(start_it) {
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reset();
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}
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void RDTSC_Collector::stop() {
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RDTSC_Timer::stop();
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_sum += RDTSC_Timer::getTicks();
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_count++;
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}
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//calculate the elapsed duration
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double RDTSC_Collector::getTotalDuration() {
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return(((double)(getTotalTicks())) / double(_ticsperms));
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}
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double RDTSC_Collector::getAverage() {
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return(((double)(getTotalTicks())) / double(_ticsperms * _count));
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}
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void RDTSC_Collector::reset() {
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_sum = 0;
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_count = 0;
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}
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