/* * benchtest1.c * * Measure time taken to complete an elementary operation. * * - Mutex * Single thread iteration over lock/unlock for each mutex type. */ #include "test.h" #include <sys/timeb.h> #ifdef __GNUC__ #include <stdlib.h> #endif #include "benchtest.h" #define PTW32_MUTEX_TYPES #define ITERATIONS 10000000L pthread_mutex_t mx; pthread_mutexattr_t ma; struct _timeb currSysTimeStart; struct _timeb currSysTimeStop; long durationMilliSecs; long overHeadMilliSecs = 0; #define GetDurationMilliSecs(_TStart, _TStop) ((_TStop.time*1000+_TStop.millitm) \ - (_TStart.time*1000+_TStart.millitm)) /* * Dummy use of j, otherwise the loop may be removed by the optimiser * when doing the overhead timing with an empty loop. */ #define TESTSTART \ { int i, j = 0, k = 0; _ftime(&currSysTimeStart); for (i = 0; i < ITERATIONS; i++) { j++; #define TESTSTOP \ }; _ftime(&currSysTimeStop); if (j + k == i) j++; } void runTest (char * testNameString, int mType) { #ifdef PTW32_MUTEX_TYPES assert(pthread_mutexattr_settype(&ma, mType) == 0); #endif assert(pthread_mutex_init(&mx, &ma) == 0); TESTSTART assert(pthread_mutex_lock(&mx) == 0); assert(pthread_mutex_unlock(&mx) == 0); TESTSTOP assert(pthread_mutex_destroy(&mx) == 0); durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs; printf( "%-40s %15ld %15.3f\n", testNameString, durationMilliSecs, (float) durationMilliSecs * 1E3 / ITERATIONS); } int main (int argc, char *argv[]) { CRITICAL_SECTION cs; old_mutex_t ox; pthread_mutexattr_init(&ma); printf( "========================================================================\n"); printf( "\nLock plus unlock on an unlocked mutex.\n%ld iterations\n\n", ITERATIONS); printf( "%-40s %15s %15s\n", "Test", "Total(msec)", "average(usec)"); printf( "------------------------------------------------------------------------\n"); /* * Time the loop overhead so we can subtract it from the actual test times. */ TESTSTART assert(1 == 1); assert(1 == 1); TESTSTOP durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs; overHeadMilliSecs = durationMilliSecs; InitializeCriticalSection(&cs); TESTSTART assert((EnterCriticalSection(&cs), 1) == 1); assert((LeaveCriticalSection(&cs), 1) == 1); TESTSTOP DeleteCriticalSection(&cs); durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs; printf( "%-40s %15ld %15.3f\n", "Simple Critical Section", durationMilliSecs, (float) durationMilliSecs * 1E3 / ITERATIONS); old_mutex_use = OLD_WIN32CS; assert(old_mutex_init(&ox, NULL) == 0); TESTSTART assert(old_mutex_lock(&ox) == 0); assert(old_mutex_unlock(&ox) == 0); TESTSTOP assert(old_mutex_destroy(&ox) == 0); durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs; printf( "%-40s %15ld %15.3f\n", "PT Mutex using a Critical Section (WNT)", durationMilliSecs, (float) durationMilliSecs * 1E3 / ITERATIONS); old_mutex_use = OLD_WIN32MUTEX; assert(old_mutex_init(&ox, NULL) == 0); TESTSTART assert(old_mutex_lock(&ox) == 0); assert(old_mutex_unlock(&ox) == 0); TESTSTOP assert(old_mutex_destroy(&ox) == 0); durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs; printf( "%-40s %15ld %15.3f\n", "PT Mutex using a Win32 Mutex (W9x)", durationMilliSecs, (float) durationMilliSecs * 1E3 / ITERATIONS); printf( "........................................................................\n"); /* * Now we can start the actual tests */ #ifdef PTW32_MUTEX_TYPES runTest("PTHREAD_MUTEX_DEFAULT (W9x,WNT)", PTHREAD_MUTEX_DEFAULT); runTest("PTHREAD_MUTEX_NORMAL (W9x,WNT)", PTHREAD_MUTEX_NORMAL); runTest("PTHREAD_MUTEX_ERRORCHECK (W9x,WNT)", PTHREAD_MUTEX_ERRORCHECK); runTest("PTHREAD_MUTEX_RECURSIVE (W9x,WNT)", PTHREAD_MUTEX_RECURSIVE); #else runTest("Non-blocking lock", 0); #endif printf( "========================================================================\n"); /* * End of tests. */ pthread_mutexattr_destroy(&ma); return 0; }