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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include "test.h"
#include <stdio.h>
#include <unistd.h>
#include <inttypes.h>
#include <rte_cycles.h>
#include <rte_timer.h>
#include <rte_common.h>
#include <rte_lcore.h>
#include <rte_random.h>
#include <rte_malloc.h>
#include <rte_pause.h>
#define MAX_ITERATIONS 1000000
int outstanding_count = 0;
static void
timer_cb(struct rte_timer *t __rte_unused, void *param __rte_unused)
{
outstanding_count--;
}
#define DELAY_SECONDS 1
#ifdef RTE_EXEC_ENV_LINUX
#define do_delay() usleep(10)
#else
#define do_delay() rte_pause()
#endif
static int
test_timer_perf(void)
{
unsigned iterations = 100;
unsigned i;
struct rte_timer *tms;
uint64_t start_tsc, end_tsc, delay_start;
unsigned lcore_id = rte_lcore_id();
tms = rte_malloc(NULL, sizeof(*tms) * MAX_ITERATIONS, 0);
for (i = 0; i < MAX_ITERATIONS; i++)
rte_timer_init(&tms[i]);
const uint64_t ticks = rte_get_timer_hz() * DELAY_SECONDS;
const uint64_t ticks_per_ms = rte_get_tsc_hz()/1000;
const uint64_t ticks_per_us = ticks_per_ms/1000;
while (iterations <= MAX_ITERATIONS) {
printf("Appending %u timers\n", iterations);
start_tsc = rte_rdtsc();
for (i = 0; i < iterations; i++)
rte_timer_reset(&tms[i], ticks, SINGLE, lcore_id,
timer_cb, NULL);
end_tsc = rte_rdtsc();
printf("Time for %u timers: %"PRIu64" (%"PRIu64"ms), ", iterations,
end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
printf("Time per timer: %"PRIu64" (%"PRIu64"us)\n",
(end_tsc-start_tsc)/iterations,
((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
outstanding_count = iterations;
delay_start = rte_get_timer_cycles();
while (rte_get_timer_cycles() < delay_start + ticks)
do_delay();
start_tsc = rte_rdtsc();
while (outstanding_count)
rte_timer_manage();
end_tsc = rte_rdtsc();
printf("Time for %u callbacks: %"PRIu64" (%"PRIu64"ms), ", iterations,
end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
printf("Time per callback: %"PRIu64" (%"PRIu64"us)\n",
(end_tsc-start_tsc)/iterations,
((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
printf("Resetting %u timers\n", iterations);
start_tsc = rte_rdtsc();
for (i = 0; i < iterations; i++)
rte_timer_reset(&tms[i], rte_rand() % ticks, SINGLE, lcore_id,
timer_cb, NULL);
end_tsc = rte_rdtsc();
printf("Time for %u timers: %"PRIu64" (%"PRIu64"ms), ", iterations,
end_tsc-start_tsc, (end_tsc-start_tsc+ticks_per_ms/2)/(ticks_per_ms));
printf("Time per timer: %"PRIu64" (%"PRIu64"us)\n",
(end_tsc-start_tsc)/iterations,
((end_tsc-start_tsc)/iterations+ticks_per_us/2)/(ticks_per_us));
outstanding_count = iterations;
delay_start = rte_get_timer_cycles();
while (rte_get_timer_cycles() < delay_start + ticks)
do_delay();
rte_timer_manage();
if (outstanding_count != 0) {
printf("Error: outstanding callback count = %d\n", outstanding_count);
return -1;
}
iterations *= 10;
printf("\n");
}
printf("All timers processed ok\n");
/* measure time to poll an empty timer list */
start_tsc = rte_rdtsc();
for (i = 0; i < iterations; i++)
rte_timer_manage();
end_tsc = rte_rdtsc();
printf("\nTime per rte_timer_manage with zero timers: %"PRIu64" cycles\n",
(end_tsc - start_tsc + iterations/2) / iterations);
/* measure time to poll a timer list with timers, but without
* calling any callbacks */
rte_timer_reset(&tms[0], ticks * 100, SINGLE, lcore_id,
timer_cb, NULL);
start_tsc = rte_rdtsc();
for (i = 0; i < iterations; i++)
rte_timer_manage();
end_tsc = rte_rdtsc();
printf("Time per rte_timer_manage with zero callbacks: %"PRIu64" cycles\n",
(end_tsc - start_tsc + iterations/2) / iterations);
rte_free(tms);
return 0;
}
REGISTER_TEST_COMMAND(timer_perf_autotest, test_timer_perf);
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