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38 #include <sys/queue.h>
40 #include <rte_common.h>
41 #include <rte_memory.h>
42 #include <rte_memzone.h>
43 #include <rte_launch.h>
44 #include <rte_tailq.h>
46 #include <rte_per_lcore.h>
47 #include <rte_lcore.h>
48 #include <rte_cycles.h>
49 #include <rte_timer.h>
50 #include <rte_debug.h>
54 #define TIMER_RESOLUTION_CYCLES 20000000ULL /* around 10ms at 2 Ghz */
56 static struct rte_timer timer0;
57 static struct rte_timer timer1;
61 timer0_cb(__attribute__((unused)) struct rte_timer *tim,
62 __attribute__((unused)) void *arg)
64 static unsigned counter = 0;
65 unsigned lcore_id = rte_lcore_id();
67 printf("%s() on lcore %u\n", __func__, lcore_id);
69 /* this timer is automatically reloaded until we decide to
70 * stop it, when counter reaches 20. */
71 if ((counter ++) == 20)
77 timer1_cb(__attribute__((unused)) struct rte_timer *tim,
78 __attribute__((unused)) void *arg)
80 unsigned lcore_id = rte_lcore_id();
83 printf("%s() on lcore %u\n", __func__, lcore_id);
85 /* reload it on another lcore */
86 hz = rte_get_timer_hz();
87 lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
88 rte_timer_reset(tim, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
91 static __attribute__((noreturn)) int
92 lcore_mainloop(__attribute__((unused)) void *arg)
94 uint64_t prev_tsc = 0, cur_tsc, diff_tsc;
97 lcore_id = rte_lcore_id();
98 printf("Starting mainloop on core %u\n", lcore_id);
102 * Call the timer handler on each core: as we don't
103 * need a very precise timer, so only call
104 * rte_timer_manage() every ~10ms (at 2Ghz). In a real
105 * application, this will enhance performances as
106 * reading the HPET timer is not efficient.
108 cur_tsc = rte_rdtsc();
109 diff_tsc = cur_tsc - prev_tsc;
110 if (diff_tsc > TIMER_RESOLUTION_CYCLES) {
118 MAIN(int argc, char **argv)
125 ret = rte_eal_init(argc, argv);
127 rte_panic("Cannot init EAL\n");
129 /* init RTE timer library */
130 rte_timer_subsystem_init();
132 /* init timer structures */
133 rte_timer_init(&timer0);
134 rte_timer_init(&timer1);
136 /* load timer0, every second, on master lcore, reloaded automatically */
137 hz = rte_get_timer_hz();
138 lcore_id = rte_lcore_id();
139 rte_timer_reset(&timer0, hz, PERIODICAL, lcore_id, timer0_cb, NULL);
141 /* load timer1, every second/3, on next lcore, reloaded manually */
142 lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
143 rte_timer_reset(&timer1, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
145 /* call lcore_mainloop() on every slave lcore */
146 RTE_LCORE_FOREACH_SLAVE(lcore_id) {
147 rte_eal_remote_launch(lcore_mainloop, NULL, lcore_id);
150 /* call it on master lcore too */
151 (void) lcore_mainloop(NULL);