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/*-
* 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;
}
REGISTER_TEST_COMMAND(rwlock_autotest, test_rwlock);
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