root / testing / ptimer / HPL_ptimer_cputime.c
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| 1 | 1 | equemene | /*
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| 2 | 1 | equemene | * -- High Performance Computing Linpack Benchmark (HPL)
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| 3 | 1 | equemene | * HPL - 2.0 - September 10, 2008
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| 4 | 1 | equemene | * Antoine P. Petitet
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| 5 | 1 | equemene | * University of Tennessee, Knoxville
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| 6 | 1 | equemene | * Innovative Computing Laboratory
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| 7 | 1 | equemene | * (C) Copyright 2000-2008 All Rights Reserved
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| 8 | 1 | equemene | *
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| 9 | 1 | equemene | * -- Copyright notice and Licensing terms:
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| 10 | 1 | equemene | *
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| 11 | 1 | equemene | * Redistribution and use in source and binary forms, with or without
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| 12 | 1 | equemene | * modification, are permitted provided that the following conditions
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| 13 | 1 | equemene | * are met:
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| 14 | 1 | equemene | *
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| 15 | 1 | equemene | * 1. Redistributions of source code must retain the above copyright
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| 16 | 1 | equemene | * notice, this list of conditions and the following disclaimer.
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| 17 | 1 | equemene | *
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| 18 | 1 | equemene | * 2. Redistributions in binary form must reproduce the above copyright
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| 19 | 1 | equemene | * notice, this list of conditions, and the following disclaimer in the
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| 20 | 1 | equemene | * documentation and/or other materials provided with the distribution.
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| 21 | 1 | equemene | *
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| 22 | 1 | equemene | * 3. All advertising materials mentioning features or use of this
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| 23 | 1 | equemene | * software must display the following acknowledgement:
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| 24 | 1 | equemene | * This product includes software developed at the University of
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| 25 | 1 | equemene | * Tennessee, Knoxville, Innovative Computing Laboratory.
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| 26 | 1 | equemene | *
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| 27 | 1 | equemene | * 4. The name of the University, the name of the Laboratory, or the
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| 28 | 1 | equemene | * names of its contributors may not be used to endorse or promote
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| 29 | 1 | equemene | * products derived from this software without specific written
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| 30 | 1 | equemene | * permission.
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| 31 | 1 | equemene | *
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| 32 | 1 | equemene | * -- Disclaimer:
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| 33 | 1 | equemene | *
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| 34 | 1 | equemene | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 35 | 1 | equemene | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 36 | 1 | equemene | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 37 | 1 | equemene | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY
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| 38 | 1 | equemene | * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 39 | 1 | equemene | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 40 | 1 | equemene | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 41 | 1 | equemene | * DATA OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 42 | 1 | equemene | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 43 | 1 | equemene | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 44 | 1 | equemene | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 45 | 1 | equemene | * ---------------------------------------------------------------------
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| 46 | 1 | equemene | */
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| 47 | 1 | equemene | /*
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| 48 | 1 | equemene | * Include files
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| 49 | 1 | equemene | */
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| 50 | 1 | equemene | #include "hpl.h" |
| 51 | 1 | equemene | |
| 52 | 1 | equemene | /*
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| 53 | 1 | equemene | * Purpose
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| 54 | 1 | equemene | * =======
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| 55 | 1 | equemene | *
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| 56 | 1 | equemene | * HPL_ptimer_cputime returns the cpu time. If HPL_USE_CLOCK is defined,
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| 57 | 1 | equemene | * the clock() function is used to return an approximation of processor
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| 58 | 1 | equemene | * time used by the program. The value returned is the CPU time used so
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| 59 | 1 | equemene | * far as a clock_t; to get the number of seconds used, the result is
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| 60 | 1 | equemene | * divided by CLOCKS_PER_SEC. This function is part of the ANSI/ISO C
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| 61 | 1 | equemene | * standard library. If HPL_USE_TIMES is defined, the times() function
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| 62 | 1 | equemene | * is used instead. This function returns the current process times.
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| 63 | 1 | equemene | * times() returns the number of clock ticks that have elapsed since the
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| 64 | 1 | equemene | * system has been up. Otherwise and by default, the standard library
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| 65 | 1 | equemene | * function getrusage() is used.
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| 66 | 1 | equemene | *
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| 67 | 1 | equemene | * ---------------------------------------------------------------------
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| 68 | 1 | equemene | */
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| 69 | 1 | equemene | |
| 70 | 1 | equemene | #if defined( HPL_USE_CLOCK )
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| 71 | 1 | equemene | |
| 72 | 1 | equemene | #include <time.h> |
| 73 | 1 | equemene | |
| 74 | 1 | equemene | #ifdef STDC_HEADERS
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| 75 | 1 | equemene | double HPL_ptimer_cputime( void ) |
| 76 | 1 | equemene | #else
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| 77 | 1 | equemene | double HPL_ptimer_cputime()
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| 78 | 1 | equemene | #endif
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| 79 | 1 | equemene | {
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| 80 | 1 | equemene | static double cps = CLOCKS_PER_SEC; |
| 81 | 1 | equemene | double d;
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| 82 | 1 | equemene | clock_t t1; |
| 83 | 1 | equemene | static clock_t t0 = 0; |
| 84 | 1 | equemene | |
| 85 | 1 | equemene | if( t0 == 0 ) t0 = clock(); |
| 86 | 1 | equemene | t1 = clock() - t0; |
| 87 | 1 | equemene | d = (double)(t1) / cps;
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| 88 | 1 | equemene | return( d );
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| 89 | 1 | equemene | } |
| 90 | 1 | equemene | |
| 91 | 1 | equemene | #elif defined( HPL_USE_TIMES )
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| 92 | 1 | equemene | |
| 93 | 1 | equemene | #include <sys/times.h> |
| 94 | 1 | equemene | #include <unistd.h> |
| 95 | 1 | equemene | |
| 96 | 1 | equemene | #ifdef STDC_HEADERS
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| 97 | 1 | equemene | double HPL_ptimer_cputime( void ) |
| 98 | 1 | equemene | #else
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| 99 | 1 | equemene | double HPL_ptimer_cputime()
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| 100 | 1 | equemene | #endif
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| 101 | 1 | equemene | {
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| 102 | 1 | equemene | clock_t t1; |
| 103 | 1 | equemene | struct tms ts;
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| 104 | 1 | equemene | static double ClockTick = HPL_rzero; |
| 105 | 1 | equemene | |
| 106 | 1 | equemene | if( ClockTick == HPL_rzero ) ClockTick = (double)(sysconf(_SC_CLK_TCK)); |
| 107 | 1 | equemene | (void) times( &ts );
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| 108 | 1 | equemene | return( (double)(ts.tms_utime) / ClockTick ); |
| 109 | 1 | equemene | } |
| 110 | 1 | equemene | |
| 111 | 1 | equemene | /* #elif defined( HPL_USE_GETRUSAGE ) */
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| 112 | 1 | equemene | #else
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| 113 | 1 | equemene | |
| 114 | 1 | equemene | #include <sys/time.h> |
| 115 | 1 | equemene | #include <sys/resource.h> |
| 116 | 1 | equemene | |
| 117 | 1 | equemene | #ifdef STDC_HEADERS
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| 118 | 1 | equemene | double HPL_ptimer_cputime( void ) |
| 119 | 1 | equemene | #else
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| 120 | 1 | equemene | double HPL_ptimer_cputime()
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| 121 | 1 | equemene | #endif
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| 122 | 1 | equemene | {
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| 123 | 1 | equemene | struct rusage ruse;
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| 124 | 1 | equemene | |
| 125 | 1 | equemene | (void) getrusage( RUSAGE_SELF, &ruse );
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| 126 | 1 | equemene | return( (double)( ruse.ru_utime.tv_sec ) + |
| 127 | 1 | equemene | ( (double)( ruse.ru_utime.tv_usec ) / 1000000.0 ) ); |
| 128 | 1 | equemene | } |
| 129 | 1 | equemene | |
| 130 | 1 | equemene | /*
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| 131 | 1 | equemene | #else
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| 132 | 1 | equemene | |
| 133 | 1 | equemene | #ifdef STDC_HEADERS
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| 134 | 1 | equemene | double HPL_ptimer_cputime( void )
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| 135 | 1 | equemene | #else
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| 136 | 1 | equemene | double HPL_ptimer_cputime()
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| 137 | 1 | equemene | #endif
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| 138 | 1 | equemene | {
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| 139 | 1 | equemene | return( HPL_PTIMER_ERROR );
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| 140 | 1 | equemene | }
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| 141 | 1 | equemene | */
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| 142 | 1 | equemene | |
| 143 | 1 | equemene | #endif
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| 144 | 1 | equemene | /*
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| 145 | 1 | equemene | * End of HPL_ptimer_cputime
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| 146 | 1 | equemene | */ |