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Diffstat (limited to 'test/test/test_timer_perf.c')
| -rw-r--r-- | test/test/test_timer_perf.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/test/test/test_timer_perf.c b/test/test/test_timer_perf.c new file mode 100644 index 00000000..fa77efbd --- /dev/null +++ b/test/test/test_timer_perf.c @@ -0,0 +1,161 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#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> + +#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_LINUXAPP +#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); + + return 0; +} + +REGISTER_TEST_COMMAND(timer_perf_autotest, test_timer_perf); |