mirror of
https://github.com/amd/blis.git
synced 2026-05-05 06:51:11 +00:00
541b8a3b3e
Details: - Removed a guard from bli_clock_min_diff() that would return 0 if the time delta was greater than 60 minutes. This was originally intended to disregard extremely large values under the assumption that the user probably didn't intend to run a test that long. However, since it is in bli_clock_min_diff(), it doesn't actually help short-circuit an implementation that is hanging or looping infinitely, since such an implementation would first have to finish before the bli_clock_min_diff() is called. Thanks to Kiran Varaganti for reporting this issue.
138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/*
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BLIS
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An object-based framework for developing high-performance BLAS-like
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libraries.
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Copyright (C) 2014, The University of Texas at Austin
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Copyright (C) 2018, Advanced Micro Devices, Inc.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of The University of Texas at Austin nor the names
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of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "blis.h"
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static double gtod_ref_time_sec = 0.0;
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double bli_clock( void )
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{
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return bli_clock_helper();
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}
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double bli_clock_min_diff( double time_min, double time_start )
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{
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double time_min_prev;
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double time_diff;
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// Save the old value.
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time_min_prev = time_min;
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time_diff = bli_clock() - time_start;
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time_min = bli_fmin( time_min, time_diff );
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// Assume that anything:
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// - under or equal to zero,
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// - under a nanosecond
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// is actually garbled due to the clocks being taken too closely together.
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if ( time_min <= 0.0 ) time_min = time_min_prev;
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else if ( time_min < 1.0e-9 ) time_min = time_min_prev;
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return time_min;
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}
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#if BLIS_OS_WINDOWS
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// --- Begin Windows build definitions -----------------------------------------
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double bli_clock_helper()
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{
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LARGE_INTEGER clock_freq = {0};
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LARGE_INTEGER clock_val;
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BOOL r_val;
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r_val = QueryPerformanceFrequency( &clock_freq );
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if ( r_val == 0 )
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{
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bli_print_msg( "QueryPerformanceFrequency() failed", __FILE__, __LINE__ );
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bli_abort();
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}
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r_val = QueryPerformanceCounter( &clock_val );
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if ( r_val == 0 )
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{
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bli_print_msg( "QueryPerformanceCounter() failed", __FILE__, __LINE__ );
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bli_abort();
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}
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return ( ( double) clock_val.QuadPart / ( double) clock_freq.QuadPart );
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}
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// --- End Windows build definitions -------------------------------------------
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#elif BLIS_OS_OSX
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// --- Begin OSX build definitions -------------------------------------------
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double bli_clock_helper()
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{
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mach_timebase_info_data_t timebase;
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mach_timebase_info( &timebase );
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uint64_t nsec = mach_absolute_time();
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double the_time = (double) nsec * 1.0e-9 * timebase.numer / timebase.denom;
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if ( gtod_ref_time_sec == 0.0 )
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gtod_ref_time_sec = the_time;
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return the_time - gtod_ref_time_sec;
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}
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// --- End OSX build definitions ---------------------------------------------
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#else
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// --- Begin Linux build definitions -------------------------------------------
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double bli_clock_helper()
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{
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double the_time, norm_sec;
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struct timespec ts;
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clock_gettime( CLOCK_MONOTONIC, &ts );
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if ( gtod_ref_time_sec == 0.0 )
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gtod_ref_time_sec = ( double ) ts.tv_sec;
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norm_sec = ( double ) ts.tv_sec - gtod_ref_time_sec;
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the_time = norm_sec + ts.tv_nsec * 1.0e-9;
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return the_time;
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}
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// --- End Linux build definitions ---------------------------------------------
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#endif
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