Imported Upstream version 16.04

[deb_dpdk.git] / app / test / test_rwlock.c

diff --git a/app/test/test_rwlock.c b/app/test/test_rwlock.c
new file mode 100644 (file)
index 0000000..b383bba
--- /dev/null
+++ b/app/test/test_rwlock.c
@@ -0,0 +1,136 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/queue.h>
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_rwlock.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_cycles.h>
+
+#include "test.h"
+
+/*
+ * rwlock test
+ * ===========
+ *
+ * - There is a global rwlock and a table of rwlocks (one per lcore).
+ *
+ * - The test function takes all of these locks and launches the
+ *   ``test_rwlock_per_core()`` function on each core (except the master).
+ *
+ *   - The function takes the global write lock, display something,
+ *     then releases the global lock.
+ *   - Then, it takes the per-lcore write lock, display something, and
+ *     releases the per-core lock.
+ *   - Finally, a read lock is taken during 100 ms, then released.
+ *
+ * - The main function unlocks the per-lcore locks sequentially and
+ *   waits between each lock. This triggers the display of a message
+ *   for each core, in the correct order.
+ *
+ *   Then, it tries to take the global write lock and display the last
+ *   message. The autotest script checks that the message order is correct.
+ */
+
+static rte_rwlock_t sl;
+static rte_rwlock_t sl_tab[RTE_MAX_LCORE];
+
+static int
+test_rwlock_per_core(__attribute__((unused)) void *arg)
+{
+       rte_rwlock_write_lock(&sl);
+       printf("Global write lock taken on core %u\n", rte_lcore_id());
+       rte_rwlock_write_unlock(&sl);
+
+       rte_rwlock_write_lock(&sl_tab[rte_lcore_id()]);
+       printf("Hello from core %u !\n", rte_lcore_id());
+       rte_rwlock_write_unlock(&sl_tab[rte_lcore_id()]);
+
+       rte_rwlock_read_lock(&sl);
+       printf("Global read lock taken on core %u\n", rte_lcore_id());
+       rte_delay_ms(100);
+       printf("Release global read lock on core %u\n", rte_lcore_id());
+       rte_rwlock_read_unlock(&sl);
+
+       return 0;
+}
+
+static int
+test_rwlock(void)
+{
+       int i;
+
+       rte_rwlock_init(&sl);
+       for (i=0; i<RTE_MAX_LCORE; i++)
+               rte_rwlock_init(&sl_tab[i]);
+
+       rte_rwlock_write_lock(&sl);
+
+       RTE_LCORE_FOREACH_SLAVE(i) {
+               rte_rwlock_write_lock(&sl_tab[i]);
+               rte_eal_remote_launch(test_rwlock_per_core, NULL, i);
+       }
+
+       rte_rwlock_write_unlock(&sl);
+
+       RTE_LCORE_FOREACH_SLAVE(i) {
+               rte_rwlock_write_unlock(&sl_tab[i]);
+               rte_delay_ms(100);
+       }
+
+       rte_rwlock_write_lock(&sl);
+       /* this message should be the last message of test */
+       printf("Global write lock taken on master core %u\n", rte_lcore_id());
+       rte_rwlock_write_unlock(&sl);
+
+       rte_eal_mp_wait_lcore();
+
+       return 0;
+}
+
+static struct test_command rwlock_cmd = {
+       .command = "rwlock_autotest",
+       .callback = test_rwlock,
+};
+REGISTER_TEST_COMMAND(rwlock_cmd);