363 lines
10 KiB
C
363 lines
10 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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* Timer
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* =====
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*
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* #. Stress tests.
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*
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* The objective of the timer stress tests is to check that there are no
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* race conditions in list and status management. This test launches,
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* resets and stops the timer very often on many cores at the same
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* time.
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*
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* - Only one timer is used for this test.
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* - On each core, the rte_timer_manage() function is called from the main
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* loop every 3 microseconds.
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* - In the main loop, the timer may be reset (randomly, with a
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* probability of 0.5 %) 100 microseconds later on a random core, or
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* stopped (with a probability of 0.5 % also).
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* - In callback, the timer is can be reset (randomly, with a
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* probability of 0.5 %) 100 microseconds later on the same core or
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* on another core (same probability), or stopped (same
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* probability).
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*
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*
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* #. Basic test.
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*
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* This test performs basic functional checks of the timers. The test
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* uses four different timers that are loaded and stopped under
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* specific conditions in specific contexts.
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*
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* - Four timers are used for this test.
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* - On each core, the rte_timer_manage() function is called from main loop
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* every 3 microseconds.
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*
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* The autotest python script checks that the behavior is correct:
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*
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* - timer0
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*
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* - At initialization, timer0 is loaded by the master core, on master core
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* in "single" mode (time = 1 second).
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* - In the first 19 callbacks, timer0 is reloaded on the same core,
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* then, it is explicitly stopped at the 20th call.
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* - At t=25s, timer0 is reloaded once by timer2.
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*
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* - timer1
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*
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* - At initialization, timer1 is loaded by the master core, on the
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* master core in "single" mode (time = 2 seconds).
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* - In the first 9 callbacks, timer1 is reloaded on another
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* core. After the 10th callback, timer1 is not reloaded anymore.
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*
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* - timer2
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*
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* - At initialization, timer2 is loaded by the master core, on the
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* master core in "periodical" mode (time = 1 second).
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* - In the callback, when t=25s, it stops timer3 and reloads timer0
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* on the current core.
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*
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* - timer3
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*
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* - At initialization, timer3 is loaded by the master core, on
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* another core in "periodical" mode (time = 1 second).
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* - It is stopped at t=25s by timer2.
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <sys/queue.h>
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#include <cmdline_parse.h>
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#include <rte_common.h>
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#include <rte_log.h>
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#include <rte_memory.h>
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#include <rte_memzone.h>
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#include <rte_launch.h>
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#include <rte_cycles.h>
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#include <rte_tailq.h>
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#include <rte_eal.h>
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#include <rte_per_lcore.h>
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#include <rte_lcore.h>
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#include <rte_atomic.h>
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#include <rte_timer.h>
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#include <rte_random.h>
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#include "test.h"
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#define TEST_DURATION_S 30 /* in seconds */
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#define NB_TIMER 4
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#define RTE_LOGTYPE_TESTTIMER RTE_LOGTYPE_USER3
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static volatile uint64_t end_time;
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struct mytimerinfo {
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struct rte_timer tim;
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unsigned id;
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unsigned count;
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};
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static struct mytimerinfo mytiminfo[NB_TIMER];
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static void timer_basic_cb(struct rte_timer *tim, void *arg);
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static void
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mytimer_reset(struct mytimerinfo *timinfo, unsigned ticks,
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enum rte_timer_type type, unsigned tim_lcore,
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rte_timer_cb_t fct)
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{
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rte_timer_reset_sync(&timinfo->tim, ticks, type, tim_lcore,
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fct, timinfo);
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}
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/* timer callback for stress tests */
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static void
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timer_stress_cb(__attribute__((unused)) struct rte_timer *tim,
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__attribute__((unused)) void *arg)
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{
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long r;
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unsigned lcore_id = rte_lcore_id();
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uint64_t hz = rte_get_hpet_hz();
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if (rte_timer_pending(tim))
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return;
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r = rte_rand();
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if ((r & 0xff) == 0) {
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mytimer_reset(&mytiminfo[0], hz, SINGLE, lcore_id,
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timer_stress_cb);
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}
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else if ((r & 0xff) == 1) {
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mytimer_reset(&mytiminfo[0], hz, SINGLE,
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rte_get_next_lcore(lcore_id, 0, 1),
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timer_stress_cb);
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}
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else if ((r & 0xff) == 2) {
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rte_timer_stop(&mytiminfo[0].tim);
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}
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}
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static int
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timer_stress_main_loop(__attribute__((unused)) void *arg)
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{
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uint64_t hz = rte_get_hpet_hz();
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unsigned lcore_id = rte_lcore_id();
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uint64_t cur_time;
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int64_t diff = 0;
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long r;
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while (diff >= 0) {
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/* call the timer handler on each core */
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rte_timer_manage();
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/* simulate the processing of a packet
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* (3 us = 6000 cycles at 2 Ghz) */
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rte_delay_us(3);
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/* randomly stop or reset timer */
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r = rte_rand();
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lcore_id = rte_get_next_lcore(lcore_id, 0, 1);
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if ((r & 0xff) == 0) {
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/* 100 us */
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mytimer_reset(&mytiminfo[0], hz/10000, SINGLE, lcore_id,
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timer_stress_cb);
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}
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else if ((r & 0xff) == 1) {
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rte_timer_stop_sync(&mytiminfo[0].tim);
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}
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cur_time = rte_get_hpet_cycles();
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diff = end_time - cur_time;
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}
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lcore_id = rte_lcore_id();
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RTE_LOG(INFO, TESTTIMER, "core %u finished\n", lcore_id);
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return 0;
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}
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/* timer callback for basic tests */
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static void
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timer_basic_cb(struct rte_timer *tim, void *arg)
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{
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struct mytimerinfo *timinfo = arg;
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uint64_t hz = rte_get_hpet_hz();
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unsigned lcore_id = rte_lcore_id();
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uint64_t cur_time = rte_get_hpet_cycles();
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if (rte_timer_pending(tim))
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return;
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timinfo->count ++;
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RTE_LOG(INFO, TESTTIMER,
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"%"PRIu64": callback id=%u count=%u on core %u\n",
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cur_time, timinfo->id, timinfo->count, lcore_id);
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/* reload timer 0 on same core */
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if (timinfo->id == 0 && timinfo->count < 20) {
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mytimer_reset(timinfo, hz, SINGLE, lcore_id, timer_basic_cb);
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return;
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}
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/* reload timer 1 on next core */
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if (timinfo->id == 1 && timinfo->count < 10) {
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mytimer_reset(timinfo, hz*2, SINGLE,
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rte_get_next_lcore(lcore_id, 0, 1),
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timer_basic_cb);
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return;
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}
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/* Explicitelly stop timer 0. Once stop() called, we can even
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* erase the content of the structure: it is not referenced
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* anymore by any code (in case of dynamic structure, it can
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* be freed) */
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if (timinfo->id == 0 && timinfo->count == 20) {
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/* stop_sync() is not needed, because we know that the
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* status of timer is only modified by this core */
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rte_timer_stop(tim);
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memset(tim, 0xAA, sizeof(struct rte_timer));
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return;
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}
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/* stop timer3, and restart a new timer0 (it was removed 5
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* seconds ago) for a single shot */
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if (timinfo->id == 2 && timinfo->count == 25) {
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rte_timer_stop_sync(&mytiminfo[3].tim);
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/* need to reinit because structure was erased with 0xAA */
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rte_timer_init(&mytiminfo[0].tim);
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mytimer_reset(&mytiminfo[0], hz, SINGLE, lcore_id,
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timer_basic_cb);
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}
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}
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static int
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timer_basic_main_loop(__attribute__((unused)) void *arg)
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{
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uint64_t hz = rte_get_hpet_hz();
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unsigned lcore_id = rte_lcore_id();
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uint64_t cur_time;
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int64_t diff = 0;
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/* launch all timers on core 0 */
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if (lcore_id == rte_get_master_lcore()) {
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mytimer_reset(&mytiminfo[0], hz, SINGLE, lcore_id,
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timer_basic_cb);
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mytimer_reset(&mytiminfo[1], hz*2, SINGLE, lcore_id,
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timer_basic_cb);
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mytimer_reset(&mytiminfo[2], hz, PERIODICAL, lcore_id,
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timer_basic_cb);
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mytimer_reset(&mytiminfo[3], hz, PERIODICAL,
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rte_get_next_lcore(lcore_id, 0, 1),
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timer_basic_cb);
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}
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while (diff >= 0) {
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/* call the timer handler on each core */
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rte_timer_manage();
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/* simulate the processing of a packet
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* (3 us = 6000 cycles at 2 Ghz) */
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rte_delay_us(3);
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cur_time = rte_get_hpet_cycles();
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diff = end_time - cur_time;
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}
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RTE_LOG(INFO, TESTTIMER, "core %u finished\n", lcore_id);
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return 0;
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}
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int
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test_timer(void)
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{
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unsigned i;
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uint64_t cur_time;
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uint64_t hz;
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if (rte_lcore_count() < 2) {
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printf("not enough lcores for this test\n");
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return -1;
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}
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/* init timer */
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for (i=0; i<NB_TIMER; i++) {
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memset(&mytiminfo[i], 0, sizeof(struct mytimerinfo));
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mytiminfo[i].id = i;
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rte_timer_init(&mytiminfo[i].tim);
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}
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/* calculate the "end of test" time */
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cur_time = rte_get_hpet_cycles();
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hz = rte_get_hpet_hz();
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end_time = cur_time + (hz * TEST_DURATION_S);
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/* start other cores */
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printf("Start timer stress tests (%d seconds)\n", TEST_DURATION_S);
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rte_eal_mp_remote_launch(timer_stress_main_loop, NULL, CALL_MASTER);
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rte_eal_mp_wait_lcore();
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/* stop timer 0 used for stress test */
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rte_timer_stop_sync(&mytiminfo[0].tim);
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/* calculate the "end of test" time */
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cur_time = rte_get_hpet_cycles();
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hz = rte_get_hpet_hz();
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end_time = cur_time + (hz * TEST_DURATION_S);
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/* start other cores */
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printf("Start timer basic tests (%d seconds)\n", TEST_DURATION_S);
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rte_eal_mp_remote_launch(timer_basic_main_loop, NULL, CALL_MASTER);
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rte_eal_mp_wait_lcore();
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/* stop all timers */
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for (i=0; i<NB_TIMER; i++) {
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rte_timer_stop_sync(&mytiminfo[i].tim);
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}
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rte_timer_dump_stats();
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return 0;
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}
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