91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2013 CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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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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*
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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, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file profile.h:
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* @brief Simple profiling functions for measuring code execution time.
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*/
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#ifndef __TPROFILE_H
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#define __TPROFILE_H
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#include <sys/time.h>
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#include <stdint.h>
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/**
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* Function get_tics
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* Returns the number of microseconds that have elapsed since the system was started.
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* @return uint64_t Number of microseconds.
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*/
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static inline uint64_t get_tics()
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{
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struct timeval tv;
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gettimeofday( &tv, NULL );
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return (uint64_t) tv.tv_sec * 1000000ULL + (uint64_t) tv.tv_usec;
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}
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/**
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* Structure for storing data related to profiling counters.
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*/
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struct prof_counter
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{
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uint64_t start, end; // Stored timer value
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uint64_t usecs() const
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{
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return end - start;
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}
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float msecs() const
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{
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return ( end - start ) / 1000.0;
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}
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};
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/**
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* Function prof_start
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* Begins code execution time counting for a given profiling counter.
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* @param aCnt is the counter which should be started.
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* use_rdtsc tells if processor's time-stamp counter should be used for time counting.
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* Otherwise is system tics method will be used. IMPORTANT: time-stamp counter should not
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* be used on multicore machines executing threaded code.
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*/
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static inline void prof_start( prof_counter* aCnt )
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{
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aCnt->start = get_tics();
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}
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/**
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* Function prof_stop
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* Ends code execution time counting for a given profiling counter.
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* @param aCnt is the counter which should be stopped.
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*/
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static inline void prof_end( prof_counter* aCnt )
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{
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aCnt->end = get_tics();
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}
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#endif
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