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+/*
+ * benchtest1.c
+ *
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Pthreads-win32 - POSIX Threads Library for Win32
+ * Copyright(C) 1998 John E. Bossom
+ * Copyright(C) 1999,2005 Pthreads-win32 contributors
+ *
+ * Contact Email: rpj@callisto.canberra.edu.au
+ *
+ * The current list of contributors is contained
+ * in the file CONTRIBUTORS included with the source
+ * code distribution. The list can also be seen at the
+ * following World Wide Web location:
+ * http://sources.redhat.com/pthreads-win32/contributors.html
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library in the file COPYING.LIB;
+ * if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Measure time taken to complete an elementary operation.
+ *
+ * - Mutex
+ * Two threads iterate over lock/unlock for each mutex type.
+ * The two threads are forced into lock-step using two mutexes,
+ * forcing the threads to block on each lock operation. The
+ * time measured is therefore the worst case senario.
+ */
+
+#include "test.h"
+#include <sys/timeb.h>
+
+#ifdef __GNUC__
+#include <stdlib.h>
+#endif
+
+#include "benchtest.h"
+
+#define PTW32_MUTEX_TYPES
+#define ITERATIONS 100000L
+
+pthread_mutex_t gate1, gate2;
+old_mutex_t ox1, ox2;
+CRITICAL_SECTION cs1, cs2;
+pthread_mutexattr_t ma;
+long durationMilliSecs;
+long overHeadMilliSecs = 0;
+struct _timeb currSysTimeStart;
+struct _timeb currSysTimeStop;
+pthread_t worker;
+int running = 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 *
+overheadThread(void * arg)
+{
+ do
+ {
+ sched_yield();
+ }
+ while (running);
+
+ return NULL;
+}
+
+
+void *
+oldThread(void * arg)
+{
+ do
+ {
+ (void) old_mutex_lock(&ox1);
+ (void) old_mutex_lock(&ox2);
+ (void) old_mutex_unlock(&ox1);
+ sched_yield();
+ (void) old_mutex_unlock(&ox2);
+ }
+ while (running);
+
+ return NULL;
+}
+
+void *
+workerThread(void * arg)
+{
+ do
+ {
+ (void) pthread_mutex_lock(&gate1);
+ (void) pthread_mutex_lock(&gate2);
+ (void) pthread_mutex_unlock(&gate1);
+ sched_yield();
+ (void) pthread_mutex_unlock(&gate2);
+ }
+ while (running);
+
+ return NULL;
+}
+
+void *
+CSThread(void * arg)
+{
+ do
+ {
+ EnterCriticalSection(&cs1);
+ EnterCriticalSection(&cs2);
+ LeaveCriticalSection(&cs1);
+ sched_yield();
+ LeaveCriticalSection(&cs2);
+ }
+ while (running);
+
+ return NULL;
+}
+
+void
+runTest (char * testNameString, int mType)
+{
+#ifdef PTW32_MUTEX_TYPES
+ assert(pthread_mutexattr_settype(&ma, mType) == 0);
+#endif
+ assert(pthread_mutex_init(&gate1, &ma) == 0);
+ assert(pthread_mutex_init(&gate2, &ma) == 0);
+ assert(pthread_mutex_lock(&gate1) == 0);
+ assert(pthread_mutex_lock(&gate2) == 0);
+ running = 1;
+ assert(pthread_create(&worker, NULL, workerThread, NULL) == 0);
+ TESTSTART
+ (void) pthread_mutex_unlock(&gate1);
+ sched_yield();
+ (void) pthread_mutex_unlock(&gate2);
+ (void) pthread_mutex_lock(&gate1);
+ (void) pthread_mutex_lock(&gate2);
+ TESTSTOP
+ running = 0;
+ assert(pthread_mutex_unlock(&gate2) == 0);
+ assert(pthread_mutex_unlock(&gate1) == 0);
+ assert(pthread_join(worker, NULL) == 0);
+ assert(pthread_mutex_destroy(&gate2) == 0);
+ assert(pthread_mutex_destroy(&gate1) == 0);
+ durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
+ printf( "%-45s %15ld %15.3f\n",
+ testNameString,
+ durationMilliSecs,
+ (float) durationMilliSecs * 1E3 / ITERATIONS / 4 /* Four locks/unlocks per iteration */);
+}
+
+
+int
+main (int argc, char *argv[])
+{
+ assert(pthread_mutexattr_init(&ma) == 0);
+
+ printf( "=============================================================================\n");
+ printf( "\nLock plus unlock on a locked mutex.\n");
+ printf("%ld iterations, four locks/unlocks per iteration.\n\n", ITERATIONS);
+
+ printf( "%-45s %15s %15s\n",
+ "Test",
+ "Total(msec)",
+ "average(usec)");
+ printf( "-----------------------------------------------------------------------------\n");
+
+ /*
+ * Time the loop overhead so we can subtract it from the actual test times.
+ */
+
+ running = 1;
+ assert(pthread_create(&worker, NULL, overheadThread, NULL) == 0);
+ TESTSTART
+ sched_yield();
+ sched_yield();
+ TESTSTOP
+ running = 0;
+ assert(pthread_join(worker, NULL) == 0);
+ durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
+ overHeadMilliSecs = durationMilliSecs;
+
+
+ InitializeCriticalSection(&cs1);
+ InitializeCriticalSection(&cs2);
+ EnterCriticalSection(&cs1);
+ EnterCriticalSection(&cs2);
+ running = 1;
+ assert(pthread_create(&worker, NULL, CSThread, NULL) == 0);
+ TESTSTART
+ LeaveCriticalSection(&cs1);
+ sched_yield();
+ LeaveCriticalSection(&cs2);
+ EnterCriticalSection(&cs1);
+ EnterCriticalSection(&cs2);
+ TESTSTOP
+ running = 0;
+ LeaveCriticalSection(&cs2);
+ LeaveCriticalSection(&cs1);
+ assert(pthread_join(worker, NULL) == 0);
+ DeleteCriticalSection(&cs2);
+ DeleteCriticalSection(&cs1);
+ durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
+ printf( "%-45s %15ld %15.3f\n",
+ "Simple Critical Section",
+ durationMilliSecs,
+ (float) durationMilliSecs * 1E3 / ITERATIONS / 4 );
+
+
+ old_mutex_use = OLD_WIN32CS;
+ assert(old_mutex_init(&ox1, NULL) == 0);
+ assert(old_mutex_init(&ox2, NULL) == 0);
+ assert(old_mutex_lock(&ox1) == 0);
+ assert(old_mutex_lock(&ox2) == 0);
+ running = 1;
+ assert(pthread_create(&worker, NULL, oldThread, NULL) == 0);
+ TESTSTART
+ (void) old_mutex_unlock(&ox1);
+ sched_yield();
+ (void) old_mutex_unlock(&ox2);
+ (void) old_mutex_lock(&ox1);
+ (void) old_mutex_lock(&ox2);
+ TESTSTOP
+ running = 0;
+ assert(old_mutex_unlock(&ox1) == 0);
+ assert(old_mutex_unlock(&ox2) == 0);
+ assert(pthread_join(worker, NULL) == 0);
+ assert(old_mutex_destroy(&ox2) == 0);
+ assert(old_mutex_destroy(&ox1) == 0);
+ durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
+ printf( "%-45s %15ld %15.3f\n",
+ "Old PT Mutex using a Critical Section (WNT)",
+ durationMilliSecs,
+ (float) durationMilliSecs * 1E3 / ITERATIONS / 4);
+
+
+ old_mutex_use = OLD_WIN32MUTEX;
+ assert(old_mutex_init(&ox1, NULL) == 0);
+ assert(old_mutex_init(&ox2, NULL) == 0);
+ assert(old_mutex_lock(&ox1) == 0);
+ assert(old_mutex_lock(&ox2) == 0);
+ running = 1;
+ assert(pthread_create(&worker, NULL, oldThread, NULL) == 0);
+ TESTSTART
+ (void) old_mutex_unlock(&ox1);
+ sched_yield();
+ (void) old_mutex_unlock(&ox2);
+ (void) old_mutex_lock(&ox1);
+ (void) old_mutex_lock(&ox2);
+ TESTSTOP
+ running = 0;
+ assert(old_mutex_unlock(&ox1) == 0);
+ assert(old_mutex_unlock(&ox2) == 0);
+ assert(pthread_join(worker, NULL) == 0);
+ assert(old_mutex_destroy(&ox2) == 0);
+ assert(old_mutex_destroy(&ox1) == 0);
+ durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
+ printf( "%-45s %15ld %15.3f\n",
+ "Old PT Mutex using a Win32 Mutex (W9x)",
+ durationMilliSecs,
+ (float) durationMilliSecs * 1E3 / ITERATIONS / 4);
+
+ 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("Blocking locks", 0);
+#endif
+
+ printf( "=============================================================================\n");
+ /*
+ * End of tests.
+ */
+
+ pthread_mutexattr_destroy(&ma);
+
+ return 0;
+}
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