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39 #include <rte_cycles.h>
40 #include <rte_timer.h>
41 #include <rte_common.h>
42 #include <rte_lcore.h>
43 #include <rte_random.h>
44 #include <rte_malloc.h>
45 #include <rte_pause.h>
47 #undef TEST_TIMER_RACECOND_VERBOSE
49 #ifdef RTE_EXEC_ENV_LINUXAPP
50 #define usec_delay(us) usleep(us)
52 #define usec_delay(us) rte_delay_us(us)
55 #define BILLION (1UL << 30)
57 #define TEST_DURATION_S 20 /* in seconds */
60 static struct rte_timer timer[N_TIMERS];
61 static unsigned timer_lcore_id[N_TIMERS];
63 static unsigned master;
64 static volatile unsigned stop_slaves;
66 static int reload_timer(struct rte_timer *tim);
69 timer_cb(struct rte_timer *tim, void *arg __rte_unused)
71 /* Simulate slow callback function, 100 us. */
74 #ifdef TEST_TIMER_RACECOND_VERBOSE
76 printf("------------------------------------------------\n");
77 printf("timer_cb: core %u timer %lu\n",
78 rte_lcore_id(), tim - timer);
80 (void)reload_timer(tim);
83 RTE_DEFINE_PER_LCORE(unsigned, n_reset_collisions);
86 reload_timer(struct rte_timer *tim)
88 /* Make timer expire roughly when the TSC hits the next BILLION
89 * multiple. Add in timer's index to make them expire in nearly
90 * sorted order. This makes all timers somewhat synchronized,
91 * firing ~2-3 times per second, assuming 2-3 GHz TSCs.
93 uint64_t ticks = BILLION - (rte_get_timer_cycles() % BILLION) +
97 ret = rte_timer_reset(tim, ticks, PERIODICAL, master, timer_cb, NULL);
99 #ifdef TEST_TIMER_RACECOND_VERBOSE
100 printf("- core %u failed to reset timer %lu (OK)\n",
101 rte_lcore_id(), tim - timer);
103 RTE_PER_LCORE(n_reset_collisions) += 1;
109 slave_main_loop(__attribute__((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);