xnu-1456.1.26.tar.gz

[apple/xnu.git] / tools / tests / libMicro / mutex.c

diff --git a/tools/tests/libMicro/mutex.c b/tools/tests/libMicro/mutex.c
new file mode 100644 (file)
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+++ b/tools/tests/libMicro/mutex.c
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+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms
+ * of the Common Development and Distribution License
+ * (the "License").  You may not use this file except
+ * in compliance with the License.
+ *
+ * You can obtain a copy of the license at
+ * src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing
+ * permissions and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL
+ * HEADER in each file and include the License file at
+ * usr/src/OPENSOLARIS.LICENSE.  If applicable,
+ * add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your
+ * own identifying information: Portions Copyright [yyyy]
+ * [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * mutex
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <sys/mman.h>
+
+#include "libmicro.h"
+
+static int                     optt = 0;
+static int                     optp = 0;
+static int                     opth = 0;
+static int                     opto = 0;
+
+pthread_mutex_t                        *lock;
+
+typedef struct {
+       int                     ts_once;
+       pthread_mutex_t         *ts_lock;
+} tsd_t;
+
+int
+benchmark_init()
+{
+       lm_tsdsize = sizeof (tsd_t);
+
+       (void) sprintf(lm_usage,
+           "       [-t] (create dummy thread so we are multithreaded)\n"
+           "       [-p] (use inter-process mutex (not support everywhere))\n"
+           "       [-h usecs] (specify mutex hold time (default 0)\n"
+           "notes: measures uncontended pthread_mutex_[un,]lock\n");
+
+       (void) sprintf(lm_optstr, "tph:o:");
+
+       (void) sprintf(lm_header, "%8s", "holdtime");
+
+       return (0);
+}
+
+/*ARGSUSED*/
+int
+benchmark_optswitch(int opt, char *optarg)
+{
+       switch (opt) {
+       case 'p':
+               optp = 1;
+               break;
+
+       case 't':
+               optt = 1;
+               break;
+
+       case 'h':
+               opth = sizetoint(optarg);
+               break;
+
+       case 'o':
+               opto = sizetoint(optarg);
+               break;
+
+       default:
+               return (-1);
+       }
+       return (0);
+}
+
+void *
+dummy(void *arg)
+{
+       (void) pause();
+       return (arg);
+}
+
+int
+benchmark_initrun()
+{
+       pthread_mutexattr_t     attr;
+       int errors = 0;
+
+       /*LINTED*/
+       lock = (pthread_mutex_t *)mmap(NULL,
+           getpagesize(),
+           PROT_READ | PROT_WRITE,
+           optp?(MAP_ANON | MAP_SHARED):MAP_ANON|MAP_PRIVATE,
+           -1, 0L) + opto;
+
+       if (lock == MAP_FAILED) {
+               errors++;
+       } else {
+               (void) pthread_mutexattr_init(&attr);
+               if (optp)
+                       (void) pthread_mutexattr_setpshared(&attr,
+                           PTHREAD_PROCESS_SHARED);
+
+               if (pthread_mutex_init(lock, &attr) != 0)
+                       errors++;
+       }
+
+       return (errors);
+}
+
+int
+benchmark_initworker(void *tsd)
+{
+       int errors = 0;
+       tsd_t                   *ts = (tsd_t *)tsd;
+
+
+       if (optt) {
+               pthread_t               tid;
+
+
+
+               if (pthread_create(&tid, NULL, dummy, NULL) != 0) {
+                       errors++;
+               }
+       }
+
+       ts->ts_lock = lock;
+
+       return (errors);
+}
+
+void
+spinme(int usecs)
+{
+       long long s = getusecs();
+
+       while (getusecs() - s < usecs)
+               ;
+}
+
+int
+benchmark(void *tsd, result_t *res)
+{
+       tsd_t                   *ts = (tsd_t *)tsd;
+       int                     i;
+
+       for (i = 0; i < lm_optB; i ++) {
+
+               (void) pthread_mutex_lock(ts->ts_lock);
+               if (opth)
+                       spinme(opth);
+               (void) pthread_mutex_unlock(ts->ts_lock);
+
+       }
+
+       res->re_count = lm_optB;
+
+       return (0);
+}
+
+char *
+benchmark_result()
+{
+       static char             result[256];
+
+       (void) sprintf(result, "%8d", opth);
+
+       return (result);
+}