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39 #include <sys/queue.h>
41 #include <rte_common.h>
42 #include <rte_memory.h>
43 #include <rte_memzone.h>
44 #include <rte_launch.h>
45 #include <rte_tailq.h>
47 #include <rte_per_lcore.h>
48 #include <rte_lcore.h>
49 #include <rte_cycles.h>
50 #include <rte_timer.h>
51 #include <rte_debug.h>
55 #define TIMER_RESOLUTION_CYCLES 20000000ULL /* around 10ms at 2 Ghz */
57 static struct rte_timer timer0;
58 static struct rte_timer timer1;
62 timer0_cb(__attribute__((unused)) struct rte_timer *tim,
63 __attribute__((unused)) void *arg)
65 static unsigned counter = 0;
66 unsigned lcore_id = rte_lcore_id();
68 printf("%s() on lcore %u\n", __func__, lcore_id);
70 /* this timer is automatically reloaded until we decide to
71 * stop it, when counter reaches 20. */
72 if ((counter ++) == 20)
78 timer1_cb(__attribute__((unused)) struct rte_timer *tim,
79 __attribute__((unused)) void *arg)
81 unsigned lcore_id = rte_lcore_id();
84 printf("%s() on lcore %u\n", __func__, lcore_id);
86 /* reload it on another lcore */
87 hz = rte_get_timer_hz();
88 lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
89 rte_timer_reset(tim, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
92 static __attribute__((noreturn)) int
93 lcore_mainloop(__attribute__((unused)) void *arg)
95 uint64_t prev_tsc = 0, cur_tsc, diff_tsc;
98 lcore_id = rte_lcore_id();
99 printf("Starting mainloop on core %u\n", lcore_id);
103 * Call the timer handler on each core: as we don't
104 * need a very precise timer, so only call
105 * rte_timer_manage() every ~10ms (at 2Ghz). In a real
106 * application, this will enhance performances as
107 * reading the HPET timer is not efficient.
109 cur_tsc = rte_rdtsc();
110 diff_tsc = cur_tsc - prev_tsc;
111 if (diff_tsc > TIMER_RESOLUTION_CYCLES) {
119 MAIN(int argc, char **argv)
126 ret = rte_eal_init(argc, argv);
128 rte_panic("Cannot init EAL\n");
130 /* init RTE timer library */
131 rte_timer_subsystem_init();
133 /* init timer structures */
134 rte_timer_init(&timer0);
135 rte_timer_init(&timer1);
137 /* load timer0, every second, on master lcore, reloaded automatically */
138 hz = rte_get_timer_hz();
139 lcore_id = rte_lcore_id();
140 rte_timer_reset(&timer0, hz, PERIODICAL, lcore_id, timer0_cb, NULL);
142 /* load timer1, every second/3, on next lcore, reloaded manually */
143 lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
144 rte_timer_reset(&timer1, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
146 /* call lcore_mainloop() on every slave lcore */
147 RTE_LCORE_FOREACH_SLAVE(lcore_id) {
148 rte_eal_remote_launch(lcore_mainloop, NULL, lcore_id);
151 /* call it on master lcore too */
152 (void) lcore_mainloop(NULL);