4 * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
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8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
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13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
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18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
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,
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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.
33 * version: DPDK.L.1.2.3-3
40 #include <sys/queue.h>
42 #include <rte_common.h>
43 #include <rte_memory.h>
44 #include <rte_memzone.h>
45 #include <rte_launch.h>
46 #include <rte_tailq.h>
48 #include <rte_per_lcore.h>
49 #include <rte_lcore.h>
50 #include <rte_cycles.h>
51 #include <rte_timer.h>
52 #include <rte_debug.h>
56 #define TIMER_RESOLUTION_CYCLES 20000000ULL /* around 10ms at 2 Ghz */
58 static struct rte_timer timer0;
59 static struct rte_timer timer1;
63 timer0_cb(__attribute__((unused)) struct rte_timer *tim,
64 __attribute__((unused)) void *arg)
66 static unsigned counter = 0;
67 unsigned lcore_id = rte_lcore_id();
69 printf("%s() on lcore %u\n", __func__, lcore_id);
71 /* this timer is automatically reloaded until we decide to
72 * stop it, when counter reaches 20. */
73 if ((counter ++) == 20)
79 timer1_cb(__attribute__((unused)) struct rte_timer *tim,
80 __attribute__((unused)) void *arg)
82 unsigned lcore_id = rte_lcore_id();
85 printf("%s() on lcore %u\n", __func__, lcore_id);
87 /* reload it on another lcore */
88 hz = rte_get_hpet_hz();
89 lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
90 rte_timer_reset(tim, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
93 static __attribute__((noreturn)) int
94 lcore_mainloop(__attribute__((unused)) void *arg)
96 uint64_t prev_tsc = 0, cur_tsc, diff_tsc;
99 lcore_id = rte_lcore_id();
100 printf("Starting mainloop on core %u\n", lcore_id);
104 * Call the timer handler on each core: as we don't
105 * need a very precise timer, so only call
106 * rte_timer_manage() every ~10ms (at 2Ghz). In a real
107 * application, this will enhance performances as
108 * reading the HPET timer is not efficient.
110 cur_tsc = rte_rdtsc();
111 diff_tsc = cur_tsc - prev_tsc;
112 if (diff_tsc > TIMER_RESOLUTION_CYCLES) {
120 MAIN(int argc, char **argv)
127 ret = rte_eal_init(argc, argv);
129 rte_panic("Cannot init EAL\n");
131 /* init RTE timer library */
132 rte_timer_subsystem_init();
134 /* init timer structures */
135 rte_timer_init(&timer0);
136 rte_timer_init(&timer1);
138 /* load timer0, every second, on master lcore, reloaded automatically */
139 hz = rte_get_hpet_hz();
140 lcore_id = rte_lcore_id();
141 rte_timer_reset(&timer0, hz, PERIODICAL, lcore_id, timer0_cb, NULL);
143 /* load timer1, every second/3, on next lcore, reloaded manually */
144 lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
145 rte_timer_reset(&timer1, hz/3, SINGLE, lcore_id, timer1_cb, NULL);
147 /* call lcore_mainloop() on every slave lcore */
148 RTE_LCORE_FOREACH_SLAVE(lcore_id) {
149 rte_eal_remote_launch(lcore_mainloop, NULL, lcore_id);
152 /* call it on master lcore too */
153 (void) lcore_mainloop(NULL);