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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>
45 #define MAX_ITERATIONS 1000000
47 int outstanding_count = 0;
50 timer_cb(struct rte_timer *t __rte_unused, void *param __rte_unused)
55 #define DELAY_SECONDS 1
57 #ifdef RTE_EXEC_ENV_LINUXAPP
58 #define do_delay() usleep(10)
60 #define do_delay() rte_pause()
66 unsigned iterations = 100;
68 struct rte_timer *tms;
69 uint64_t start_tsc, end_tsc, delay_start;
70 unsigned lcore_id = rte_lcore_id();
72 tms = rte_malloc(NULL, sizeof(*tms) * MAX_ITERATIONS, 0);
74 for (i = 0; i < MAX_ITERATIONS; i++)
75 rte_timer_init(&tms[i]);
77 const uint64_t ticks = rte_get_timer_hz() * DELAY_SECONDS;
78 const uint64_t ticks_per_ms = rte_get_tsc_hz()/1000;
79 const uint64_t ticks_per_us = ticks_per_ms/1000;
81 while (iterations <= MAX_ITERATIONS) {
83 printf("Appending %u timers\n", iterations);
84 start_tsc = rte_rdtsc();
85 for (i = 0; i < iterations; i++)
86 rte_timer_reset(&tms[i], ticks, SINGLE, lcore_id,
88 end_tsc = rte_rdtsc();
89 printf("Time for %u timers: %"PRIu64" (%"PRIu64"ms), ", iterations,
90 end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
91 printf("Time per timer: %"PRIu64" (%"PRIu64"us)\n",
92 (end_tsc-start_tsc)/iterations,
93 ((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
94 outstanding_count = iterations;
95 delay_start = rte_get_timer_cycles();
96 while (rte_get_timer_cycles() < delay_start + ticks)
99 start_tsc = rte_rdtsc();
100 while (outstanding_count)
102 end_tsc = rte_rdtsc();
103 printf("Time for %u callbacks: %"PRIu64" (%"PRIu64"ms), ", iterations,
104 end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
105 printf("Time per callback: %"PRIu64" (%"PRIu64"us)\n",
106 (end_tsc-start_tsc)/iterations,
107 ((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
109 printf("Resetting %u timers\n", iterations);
110 start_tsc = rte_rdtsc();
111 for (i = 0; i < iterations; i++)
112 rte_timer_reset(&tms[i], rte_rand() % ticks, SINGLE, lcore_id,
114 end_tsc = rte_rdtsc();
115 printf("Time for %u timers: %"PRIu64" (%"PRIu64"ms), ", iterations,
116 end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
117 printf("Time per timer: %"PRIu64" (%"PRIu64"us)\n",
118 (end_tsc-start_tsc)/iterations,
119 ((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
120 outstanding_count = iterations;
122 delay_start = rte_get_timer_cycles();
123 while (rte_get_timer_cycles() < delay_start + ticks)
127 if (outstanding_count != 0) {
128 printf("Error: outstanding callback count = %d\n", outstanding_count);
136 printf("All timers processed ok\n");
138 /* measure time to poll an empty timer list */
139 start_tsc = rte_rdtsc();
140 for (i = 0; i < iterations; i++)
142 end_tsc = rte_rdtsc();
143 printf("\nTime per rte_timer_manage with zero timers: %"PRIu64" cycles\n",
144 (end_tsc - start_tsc + iterations/2) / iterations);
146 /* measure time to poll a timer list with timers, but without
147 * calling any callbacks */
148 rte_timer_reset(&tms[0], ticks * 100, SINGLE, lcore_id,
150 start_tsc = rte_rdtsc();
151 for (i = 0; i < iterations; i++)
153 end_tsc = rte_rdtsc();
154 printf("Time per rte_timer_manage with zero callbacks: %"PRIu64" cycles\n",
155 (end_tsc - start_tsc + iterations/2) / iterations);