135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <sys/queue.h>
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#include <cmdline_parse.h>
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#include <rte_common.h>
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#include <rte_memory.h>
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#include <rte_memzone.h>
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#include <rte_per_lcore.h>
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#include <rte_launch.h>
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#include <rte_atomic.h>
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#include <rte_rwlock.h>
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#include <rte_tailq.h>
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#include <rte_eal.h>
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#include <rte_per_lcore.h>
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#include <rte_lcore.h>
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#include <rte_cycles.h>
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#include "test.h"
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/*
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* rwlock test
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* ===========
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*
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* - There is a global rwlock and a table of rwlocks (one per lcore).
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*
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* - The test function takes all of these locks and launches the
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* ``test_rwlock_per_core()`` function on each core (except the master).
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*
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* - The function takes the global write lock, display something,
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* then releases the global lock.
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* - Then, it takes the per-lcore write lock, display something, and
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* releases the per-core lock.
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* - Finally, a read lock is taken during 100 ms, then released.
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*
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* - The main function unlocks the per-lcore locks sequentially and
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* waits between each lock. This triggers the display of a message
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* for each core, in the correct order.
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*
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* Then, it tries to take the global write lock and display the last
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* message. The autotest script checks that the message order is correct.
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*/
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static rte_rwlock_t sl;
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static rte_rwlock_t sl_tab[RTE_MAX_LCORE];
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static int
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test_rwlock_per_core(__attribute__((unused)) void *arg)
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{
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rte_rwlock_write_lock(&sl);
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printf("Global write lock taken on core %u\n", rte_lcore_id());
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rte_rwlock_write_unlock(&sl);
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rte_rwlock_write_lock(&sl_tab[rte_lcore_id()]);
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printf("Hello from core %u !\n", rte_lcore_id());
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rte_rwlock_write_unlock(&sl_tab[rte_lcore_id()]);
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rte_rwlock_read_lock(&sl);
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printf("Global read lock taken on core %u\n", rte_lcore_id());
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rte_delay_ms(100);
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printf("Release global read lock on core %u\n", rte_lcore_id());
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rte_rwlock_read_unlock(&sl);
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return 0;
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}
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int
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test_rwlock(void)
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{
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int i;
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rte_rwlock_init(&sl);
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for (i=0; i<RTE_MAX_LCORE; i++)
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rte_rwlock_init(&sl_tab[i]);
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rte_rwlock_write_lock(&sl);
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RTE_LCORE_FOREACH_SLAVE(i) {
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rte_rwlock_write_lock(&sl_tab[i]);
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rte_eal_remote_launch(test_rwlock_per_core, NULL, i);
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}
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rte_rwlock_write_unlock(&sl);
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RTE_LCORE_FOREACH_SLAVE(i) {
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rte_rwlock_write_unlock(&sl_tab[i]);
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rte_delay_ms(100);
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}
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rte_rwlock_write_lock(&sl);
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/* this message should be the last message of test */
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printf("Global write lock taken on master core %u\n", rte_lcore_id());
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rte_rwlock_write_unlock(&sl);
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rte_eal_mp_wait_lcore();
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return 0;
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}
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