+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2015 Akamai Technologies.
- * 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>
-
-#undef TEST_TIMER_RACECOND_VERBOSE
-
-#ifdef RTE_EXEC_ENV_LINUXAPP
-#define usec_delay(us) usleep(us)
-#else
-#define usec_delay(us) rte_delay_us(us)
-#endif
-
-#define BILLION (1UL << 30)
-
-#define TEST_DURATION_S 20 /* in seconds */
-#define N_TIMERS 50
-
-static struct rte_timer timer[N_TIMERS];
-static unsigned timer_lcore_id[N_TIMERS];
-
-static unsigned master;
-static volatile unsigned stop_slaves;
-
-static int reload_timer(struct rte_timer *tim);
-
-static void
-timer_cb(struct rte_timer *tim, void *arg __rte_unused)
-{
- /* Simulate slow callback function, 100 us. */
- rte_delay_us(100);
-
-#ifdef TEST_TIMER_RACECOND_VERBOSE
- if (tim == &timer[0])
- printf("------------------------------------------------\n");
- printf("timer_cb: core %u timer %lu\n",
- rte_lcore_id(), tim - timer);
-#endif
- (void)reload_timer(tim);
-}
-
-RTE_DEFINE_PER_LCORE(unsigned, n_reset_collisions);
-
-static int
-reload_timer(struct rte_timer *tim)
-{
- /* Make timer expire roughly when the TSC hits the next BILLION
- * multiple. Add in timer's index to make them expire in nearly
- * sorted order. This makes all timers somewhat synchronized,
- * firing ~2-3 times per second, assuming 2-3 GHz TSCs.
- */
- uint64_t ticks = BILLION - (rte_get_timer_cycles() % BILLION) +
- (tim - timer);
- int ret;
-
- ret = rte_timer_reset(tim, ticks, PERIODICAL, master, timer_cb, NULL);
- if (ret != 0) {
-#ifdef TEST_TIMER_RACECOND_VERBOSE
- printf("- core %u failed to reset timer %lu (OK)\n",
- rte_lcore_id(), tim - timer);
-#endif
- RTE_PER_LCORE(n_reset_collisions) += 1;
- }
- return ret;
-}
-
-static int
-slave_main_loop(__attribute__((unused)) void *arg)
-{
- unsigned lcore_id = rte_lcore_id();
- unsigned i;
-
- RTE_PER_LCORE(n_reset_collisions) = 0;
-
- printf("Starting main loop on core %u\n", lcore_id);
-
- while (!stop_slaves) {
- /* Wait until the timer manager is running.
- * We know it's running when we see timer[0] NOT pending.
- */
- if (rte_timer_pending(&timer[0])) {
- rte_pause();
- continue;
- }
-
- /* Now, go cause some havoc!
- * Reload our timers.
- */
- for (i = 0; i < N_TIMERS; i++) {
- if (timer_lcore_id[i] == lcore_id)
- (void)reload_timer(&timer[i]);
- }
- usec_delay(100*1000); /* sleep 100 ms */
- }
-
- if (RTE_PER_LCORE(n_reset_collisions) != 0) {
- printf("- core %u, %u reset collisions (OK)\n",
- lcore_id, RTE_PER_LCORE(n_reset_collisions));
- }
- return 0;
-}
-
-static int
-test_timer_racecond(void)
-{
- int ret;
- uint64_t hz;
- uint64_t cur_time;
- uint64_t end_time;
- int64_t diff = 0;
- unsigned lcore_id;
- unsigned i;
-
- master = lcore_id = rte_lcore_id();
- hz = rte_get_timer_hz();
-
- /* init and start timers */
- for (i = 0; i < N_TIMERS; i++) {
- rte_timer_init(&timer[i]);
- ret = reload_timer(&timer[i]);
- TEST_ASSERT(ret == 0, "reload_timer failed");
-
- /* Distribute timers to slaves.
- * Note that we assign timer[0] to the master.
- */
- timer_lcore_id[i] = lcore_id;
- lcore_id = rte_get_next_lcore(lcore_id, 1, 1);
- }
-
- /* calculate the "end of test" time */
- cur_time = rte_get_timer_cycles();
- end_time = cur_time + (hz * TEST_DURATION_S);
-
- /* start slave cores */
- stop_slaves = 0;
- printf("Start timer manage race condition test (%u seconds)\n",
- TEST_DURATION_S);
- rte_eal_mp_remote_launch(slave_main_loop, NULL, SKIP_MASTER);
-
- while (diff >= 0) {
- /* run the timers */
- rte_timer_manage();
-
- /* wait 100 ms */
- usec_delay(100*1000);
-
- cur_time = rte_get_timer_cycles();
- diff = end_time - cur_time;
- }
-
- /* stop slave cores */
- printf("Stopping timer manage race condition test\n");
- stop_slaves = 1;
- rte_eal_mp_wait_lcore();
-
- /* stop timers */
- for (i = 0; i < N_TIMERS; i++) {
- ret = rte_timer_stop(&timer[i]);
- TEST_ASSERT(ret == 0, "rte_timer_stop failed");
- }
-
- return TEST_SUCCESS;
-}
-
-REGISTER_TEST_COMMAND(timer_racecond_autotest, test_timer_racecond);
Code Review / deb_dpdk.git / blobdiff