uatomic/x86: Remove redundant memory barriers

[urcu.git] / tests / benchmark / test_urcu_gc.c

diff --git a/tests/benchmark/test_urcu_gc.c b/tests/benchmark/test_urcu_gc.c
index 2f35fe982555017088174700d62db0209e42db9a..d52a51df87278328e4c7995ded69f669bc7ceb49 100644 (file)
--- a/tests/benchmark/test_urcu_gc.c
+++ b/tests/benchmark/test_urcu_gc.c
@@ -1,23 +1,9 @@
+// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 /*
- * test_urcu_gc.c
- *
  * Userspace RCU library - test program (with batch reclamation)
- *
- * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #include <stdio.h>
@@ -28,11 +14,12 @@
 #include <sys/wait.h>
 #include <unistd.h>
 #include <stdio.h>
-#include <assert.h>
 #include <errno.h>
 
 #include <urcu/arch.h>
+#include <urcu/assert.h>
 #include <urcu/tls-compat.h>
+#include <urcu/uatomic.h>
 #include "thread-id.h"
 #include "../common/debug-yield.h"
 
@@ -48,8 +35,6 @@ struct test_array {
        int a;
 };
 
-static volatile int test_go, test_stop;
-
 static unsigned long wdelay;
 
 static struct test_array *test_rcu_pointer;
@@ -93,7 +78,7 @@ pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
 
 static void set_affinity(void)
 {
-#if HAVE_SCHED_SETAFFINITY
+#ifdef HAVE_SCHED_SETAFFINITY
        cpu_set_t mask;
        int cpu, ret;
 #endif /* HAVE_SCHED_SETAFFINITY */
@@ -101,7 +86,7 @@ static void set_affinity(void)
        if (!use_affinity)
                return;
 
-#if HAVE_SCHED_SETAFFINITY
+#ifdef HAVE_SCHED_SETAFFINITY
        ret = pthread_mutex_lock(&affinity_mutex);
        if (ret) {
                perror("Error in pthread mutex lock");
@@ -120,19 +105,6 @@ static void set_affinity(void)
 #endif /* HAVE_SCHED_SETAFFINITY */
 }
 
-/*
- * returns 0 if test should end.
- */
-static int test_duration_write(void)
-{
-       return !test_stop;
-}
-
-static int test_duration_read(void)
-{
-       return !test_stop;
-}
-
 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
 
@@ -157,17 +129,14 @@ void *thr_reader(void *_count)
 
        rcu_register_thread();
 
-       while (!test_go)
-       {
-       }
-       cmm_smp_mb();
+       wait_until_go();
 
        for (;;) {
                rcu_read_lock();
                local_ptr = rcu_dereference(test_rcu_pointer);
                rcu_debug_yield_read();
                if (local_ptr)
-                       assert(local_ptr->a == 8);
+                       urcu_posix_assert(local_ptr->a == 8);
                if (caa_unlikely(rduration))
                        loop_sleep(rduration);
                rcu_read_unlock();
@@ -231,10 +200,7 @@ void *thr_writer(void *data)
 
        set_affinity();
 
-       while (!test_go)
-       {
-       }
-       cmm_smp_mb();
+       wait_until_go();
 
        for (;;) {
 #ifndef TEST_LOCAL_GC
@@ -259,7 +225,7 @@ void *thr_writer(void *data)
 }
 
 static
-void show_usage(int argc, char **argv)
+void show_usage(char **argv)
 {
        printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
                argv[0]);
@@ -284,25 +250,25 @@ int main(int argc, char **argv)
        unsigned int i_thr;
 
        if (argc < 4) {
-               show_usage(argc, argv);
+               show_usage(argv);
                return -1;
        }
 
        err = sscanf(argv[1], "%u", &nr_readers);
        if (err != 1) {
-               show_usage(argc, argv);
+               show_usage(argv);
                return -1;
        }
 
        err = sscanf(argv[2], "%u", &nr_writers);
        if (err != 1) {
-               show_usage(argc, argv);
+               show_usage(argv);
                return -1;
        }
 
        err = sscanf(argv[3], "%lu", &duration);
        if (err != 1) {
-               show_usage(argc, argv);
+               show_usage(argv);
                return -1;
        }
 
@@ -318,7 +284,7 @@ int main(int argc, char **argv)
                        break;
                case 'a':
                        if (argc < i + 2) {
-                               show_usage(argc, argv);
+                               show_usage(argv);
                                return -1;
                        }
                        a = atoi(argv[++i]);
@@ -328,28 +294,28 @@ int main(int argc, char **argv)
                        break;
                case 'b':
                        if (argc < i + 2) {
-                               show_usage(argc, argv);
+                               show_usage(argv);
                                return -1;
                        }
                        reclaim_batch = atol(argv[++i]);
                        break;
                case 'c':
                        if (argc < i + 2) {
-                               show_usage(argc, argv);
+                               show_usage(argv);
                                return -1;
                        }
                        rduration = atol(argv[++i]);
                        break;
                case 'd':
                        if (argc < i + 2) {
-                               show_usage(argc, argv);
+                               show_usage(argv);
                                return -1;
                        }
                        wdelay = atol(argv[++i]);
                        break;
                case 'e':
                        if (argc < i + 2) {
-                               show_usage(argc, argv);
+                               show_usage(argv);
                                return -1;
                        }
                        wduration = atol(argv[++i]);
@@ -399,13 +365,7 @@ int main(int argc, char **argv)
                        exit(1);
        }
 
-       cmm_smp_mb();
-
-       test_go = 1;
-
-       sleep(duration);
-
-       test_stop = 1;
+       test_for(duration);
 
        for (i_thr = 0; i_thr < nr_readers; i_thr++) {
                err = pthread_join(tid_reader[i_thr], &tret);