[ceph.git] / ceph / src / seastar / dpdk / test / test / test_rwlock.c

/*-
 *   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);
Commit	Line	Data
7c673cae FG	1	/*-
	2	* BSD LICENSE
	3	*
	4	* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	*
	11	* * Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* * Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in
	15	* the documentation and/or other materials provided with the
	16	* distribution.
	17	* * Neither the name of Intel Corporation nor the names of its
	18	* contributors may be used to endorse or promote products derived
	19	* from this software without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	22	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	23	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	24	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	25	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	26	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	27	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	28	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	29	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	30	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	31	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	32	*/
	33
	34	#include <stdio.h>
	35	#include <stdint.h>
	36	#include <unistd.h>
	37	#include <sys/queue.h>
	38
	39	#include <rte_common.h>
	40	#include <rte_memory.h>
	41	#include <rte_memzone.h>
	42	#include <rte_per_lcore.h>
	43	#include <rte_launch.h>
	44	#include <rte_atomic.h>
	45	#include <rte_rwlock.h>
	46	#include <rte_eal.h>
	47	#include <rte_per_lcore.h>
	48	#include <rte_lcore.h>
	49	#include <rte_cycles.h>
	50
	51	#include "test.h"
	52
	53	/*
	54	* rwlock test
	55	* ===========
	56	*
	57	* - There is a global rwlock and a table of rwlocks (one per lcore).
	58	*
	59	* - The test function takes all of these locks and launches the
	60	* ``test_rwlock_per_core()`` function on each core (except the master).
	61	*
	62	* - The function takes the global write lock, display something,
	63	* then releases the global lock.
	64	* - Then, it takes the per-lcore write lock, display something, and
65	* releases the per-core lock.
66	* - Finally, a read lock is taken during 100 ms, then released.
67	*
68	* - The main function unlocks the per-lcore locks sequentially and
69	* waits between each lock. This triggers the display of a message
70	* for each core, in the correct order.
71	*
72	* Then, it tries to take the global write lock and display the last
73	* message. The autotest script checks that the message order is correct.
74	*/
75
76	static rte_rwlock_t sl;
77	static rte_rwlock_t sl_tab[RTE_MAX_LCORE];
78
79	static int
80	test_rwlock_per_core(__attribute__((unused)) void *arg)
81	{
82	rte_rwlock_write_lock(&sl);
83	printf("Global write lock taken on core %u\n", rte_lcore_id());
84	rte_rwlock_write_unlock(&sl);
85
86	rte_rwlock_write_lock(&sl_tab[rte_lcore_id()]);
87	printf("Hello from core %u !\n", rte_lcore_id());
88	rte_rwlock_write_unlock(&sl_tab[rte_lcore_id()]);
89
90	rte_rwlock_read_lock(&sl);
91	printf("Global read lock taken on core %u\n", rte_lcore_id());
92	rte_delay_ms(100);
93	printf("Release global read lock on core %u\n", rte_lcore_id());
94	rte_rwlock_read_unlock(&sl);
95
96	return 0;
97	}
98
99	static int
100	test_rwlock(void)
101	{
102	int i;
103
104	rte_rwlock_init(&sl);
105	for (i=0; i<RTE_MAX_LCORE; i++)
106	rte_rwlock_init(&sl_tab[i]);
107
108	rte_rwlock_write_lock(&sl);
109
110	RTE_LCORE_FOREACH_SLAVE(i) {
111	rte_rwlock_write_lock(&sl_tab[i]);
112	rte_eal_remote_launch(test_rwlock_per_core, NULL, i);
113	}
114
115	rte_rwlock_write_unlock(&sl);
116
117	RTE_LCORE_FOREACH_SLAVE(i) {
118	rte_rwlock_write_unlock(&sl_tab[i]);
119	rte_delay_ms(100);
120	}
121
122	rte_rwlock_write_lock(&sl);
123	/* this message should be the last message of test */
124	printf("Global write lock taken on master core %u\n", rte_lcore_id());
125	rte_rwlock_write_unlock(&sl);
126
127	rte_eal_mp_wait_lcore();
128
129	return 0;
130	}
131
132	REGISTER_TEST_COMMAND(rwlock_autotest, test_rwlock);