1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2015 Akamai Technologies.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
15 * * Neither the name of Intel Corporation nor the names of its
16 * contributors may be used to endorse or promote products derived
17 * from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <rte_cycles.h>
38 #include <rte_timer.h>
39 #include <rte_common.h>
40 #include <rte_lcore.h>
41 #include <rte_random.h>
42 #include <rte_malloc.h>
43 #include <rte_pause.h>
45 #ifdef RTE_EXEC_ENV_LINUX
46 #define usec_delay(us) usleep(us)
48 #define usec_delay(us) rte_delay_us(us)
51 #define BILLION (1UL << 30)
53 #define TEST_DURATION_S 4 /* in seconds */
56 static struct rte_timer timer[N_TIMERS];
57 static unsigned timer_lcore_id[N_TIMERS];
59 static unsigned master;
60 static volatile unsigned stop_slaves;
62 static int reload_timer(struct rte_timer *tim);
64 int timer_logtype_test;
66 RTE_INIT(test_timer_init_log)
68 timer_logtype_test = rte_log_register("test.timer");
72 timer_cb(struct rte_timer *tim, void *arg __rte_unused)
74 /* Simulate slow callback function, 100 us. */
77 rte_log(RTE_LOG_DEBUG, timer_logtype_test,
78 "------------------------------------------------\n");
79 rte_log(RTE_LOG_DEBUG, timer_logtype_test, "%s: core %u timer %"
80 PRIuPTR "\n", __func__, rte_lcore_id(), tim - timer);
81 (void)reload_timer(tim);
84 RTE_DEFINE_PER_LCORE(unsigned, n_reset_collisions);
87 reload_timer(struct rte_timer *tim)
89 /* Make timer expire roughly when the TSC hits the next BILLION
90 * multiple. Add in timer's index to make them expire in nearly
91 * sorted order. This makes all timers somewhat synchronized,
92 * firing ~2-3 times per second, assuming 2-3 GHz TSCs.
94 uint64_t ticks = BILLION - (rte_get_timer_cycles() % BILLION) +
98 ret = rte_timer_reset(tim, ticks, PERIODICAL, master, timer_cb, NULL);
100 rte_log(RTE_LOG_DEBUG, timer_logtype_test,
101 "- core %u failed to reset timer %" PRIuPTR " (OK)\n",
102 rte_lcore_id(), tim - timer);
103 RTE_PER_LCORE(n_reset_collisions) += 1;
109 slave_main_loop(__rte_unused void *arg)
111 unsigned lcore_id = rte_lcore_id();
114 RTE_PER_LCORE(n_reset_collisions) = 0;
116 printf("Starting main loop on core %u\n", lcore_id);
118 while (!stop_slaves) {
119 /* Wait until the timer manager is running.
120 * We know it's running when we see timer[0] NOT pending.
122 if (rte_timer_pending(&timer[0])) {
127 /* Now, go cause some havoc!
130 for (i = 0; i < N_TIMERS; i++) {
131 if (timer_lcore_id[i] == lcore_id)
132 (void)reload_timer(&timer[i]);
134 usec_delay(100*1000); /* sleep 100 ms */
137 if (RTE_PER_LCORE(n_reset_collisions) != 0) {
138 printf("- core %u, %u reset collisions (OK)\n",
139 lcore_id, RTE_PER_LCORE(n_reset_collisions));
145 test_timer_racecond(void)
155 master = lcore_id = rte_lcore_id();
156 hz = rte_get_timer_hz();
158 /* init and start timers */
159 for (i = 0; i < N_TIMERS; i++) {
160 rte_timer_init(&timer[i]);
161 ret = reload_timer(&timer[i]);
162 TEST_ASSERT(ret == 0, "reload_timer failed");
164 /* Distribute timers to slaves.
165 * Note that we assign timer[0] to the master.
167 timer_lcore_id[i] = lcore_id;
168 lcore_id = rte_get_next_lcore(lcore_id, 1, 1);
171 /* calculate the "end of test" time */
172 cur_time = rte_get_timer_cycles();
173 end_time = cur_time + (hz * TEST_DURATION_S);
175 /* start slave cores */
177 printf("Start timer manage race condition test (%u seconds)\n",
179 rte_eal_mp_remote_launch(slave_main_loop, NULL, SKIP_MASTER);
186 usec_delay(100*1000);
188 cur_time = rte_get_timer_cycles();
189 diff = end_time - cur_time;
192 /* stop slave cores */
193 printf("Stopping timer manage race condition test\n");
195 rte_eal_mp_wait_lcore();
198 for (i = 0; i < N_TIMERS; i++) {
199 ret = rte_timer_stop(&timer[i]);
200 TEST_ASSERT(ret == 0, "rte_timer_stop failed");
206 REGISTER_TEST_COMMAND(timer_racecond_autotest, test_timer_racecond);