160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/*
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* benchtest5.c
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*
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2005 Pthreads-win32 contributors
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*
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* Contact Email: rpj@callisto.canberra.edu.au
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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* --------------------------------------------------------------------------
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*
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* Measure time taken to complete an elementary operation.
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*
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* - Semaphore
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* Single thread iteration over post/wait for a semaphore.
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*/
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#include "test.h"
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#include <sys/timeb.h>
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#ifdef __GNUC__
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#include <stdlib.h>
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#endif
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#include "benchtest.h"
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#define ITERATIONS 1000000L
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sem_t sema;
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HANDLE w32sema;
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PTW32_STRUCT_TIMEB currSysTimeStart;
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PTW32_STRUCT_TIMEB currSysTimeStop;
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long durationMilliSecs;
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long overHeadMilliSecs = 0;
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int one = 1;
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int zero = 0;
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#define GetDurationMilliSecs(_TStart, _TStop) ((long)((_TStop.time*1000+_TStop.millitm) \
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- (_TStart.time*1000+_TStart.millitm)))
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/*
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* Dummy use of j, otherwise the loop may be removed by the optimiser
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* when doing the overhead timing with an empty loop.
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*/
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#define TESTSTART \
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{ int i, j = 0, k = 0; PTW32_FTIME(&currSysTimeStart); for (i = 0; i < ITERATIONS; i++) { j++;
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#define TESTSTOP \
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}; PTW32_FTIME(&currSysTimeStop); if (j + k == i) j++; }
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void
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reportTest (char * testNameString)
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{
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durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
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printf( "%-45s %15ld %15.3f\n",
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testNameString,
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durationMilliSecs,
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(float) durationMilliSecs * 1E3 / ITERATIONS);
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}
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int
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main (int argc, char *argv[])
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{
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printf( "=============================================================================\n");
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printf( "\nOperations on a semaphore.\n%ld iterations\n\n",
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ITERATIONS);
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printf( "%-45s %15s %15s\n",
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"Test",
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"Total(msec)",
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"average(usec)");
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printf( "-----------------------------------------------------------------------------\n");
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/*
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* Time the loop overhead so we can subtract it from the actual test times.
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*/
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TESTSTART
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assert(1 == one);
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TESTSTOP
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durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
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overHeadMilliSecs = durationMilliSecs;
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/*
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* Now we can start the actual tests
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*/
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assert((w32sema = CreateSemaphore(NULL, (long) 0, (long) ITERATIONS, NULL)) != 0);
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TESTSTART
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assert((ReleaseSemaphore(w32sema, 1, NULL),1) == one);
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TESTSTOP
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assert(CloseHandle(w32sema) != 0);
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reportTest("W32 Post with no waiters");
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assert((w32sema = CreateSemaphore(NULL, (long) ITERATIONS, (long) ITERATIONS, NULL)) != 0);
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TESTSTART
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assert((WaitForSingleObject(w32sema, INFINITE),1) == one);
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TESTSTOP
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assert(CloseHandle(w32sema) != 0);
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reportTest("W32 Wait without blocking");
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assert(sem_init(&sema, 0, 0) == 0);
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TESTSTART
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assert((sem_post(&sema),1) == one);
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TESTSTOP
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assert(sem_destroy(&sema) == 0);
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reportTest("POSIX Post with no waiters");
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assert(sem_init(&sema, 0, ITERATIONS) == 0);
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TESTSTART
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assert((sem_wait(&sema),1) == one);
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TESTSTOP
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assert(sem_destroy(&sema) == 0);
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reportTest("POSIX Wait without blocking");
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printf( "=============================================================================\n");
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/*
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* End of tests.
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*/
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return 0;
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}
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