cf407431df
Prefer the existing apis rather than direct access lcore_config that is
going to disappear.
Fixes: b87089b0bb ("test/rcu: add API and functional tests")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
701 lines
16 KiB
C
701 lines
16 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (c) 2018 Arm Limited
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <inttypes.h>
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#include <rte_pause.h>
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#include <rte_rcu_qsbr.h>
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#include <rte_hash.h>
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#include <rte_hash_crc.h>
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#include <rte_malloc.h>
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#include <rte_cycles.h>
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#include <unistd.h>
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#include "test.h"
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/* Check condition and return an error if true. */
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#define TEST_RCU_MAX_LCORE 128
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static uint16_t enabled_core_ids[TEST_RCU_MAX_LCORE];
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static uint8_t num_cores;
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static uint32_t *keys;
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#define TOTAL_ENTRY (1024 * 8)
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#define COUNTER_VALUE 4096
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static uint32_t *hash_data[TEST_RCU_MAX_LCORE][TOTAL_ENTRY];
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static volatile uint8_t writer_done;
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static volatile uint8_t all_registered;
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static volatile uint32_t thr_id;
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static struct rte_rcu_qsbr *t[TEST_RCU_MAX_LCORE];
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static struct rte_hash *h[TEST_RCU_MAX_LCORE];
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static char hash_name[TEST_RCU_MAX_LCORE][8];
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static rte_atomic64_t updates, checks;
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static rte_atomic64_t update_cycles, check_cycles;
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/* Scale down results to 1000 operations to support lower
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* granularity clocks.
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*/
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#define RCU_SCALE_DOWN 1000
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/* Simple way to allocate thread ids in 0 to TEST_RCU_MAX_LCORE space */
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static inline uint32_t
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alloc_thread_id(void)
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{
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uint32_t tmp_thr_id;
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tmp_thr_id = __atomic_fetch_add(&thr_id, 1, __ATOMIC_RELAXED);
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if (tmp_thr_id >= TEST_RCU_MAX_LCORE)
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printf("Invalid thread id %u\n", tmp_thr_id);
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return tmp_thr_id;
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}
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static inline int
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get_enabled_cores_mask(void)
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{
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uint16_t core_id;
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uint32_t max_cores = rte_lcore_count();
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if (max_cores > TEST_RCU_MAX_LCORE) {
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printf("Number of cores exceed %d\n", TEST_RCU_MAX_LCORE);
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return -1;
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}
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core_id = 0;
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num_cores = 0;
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RTE_LCORE_FOREACH_SLAVE(core_id) {
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enabled_core_ids[num_cores] = core_id;
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num_cores++;
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}
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return 0;
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}
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static int
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test_rcu_qsbr_reader_perf(void *arg)
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{
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bool writer_present = (bool)arg;
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uint32_t thread_id = alloc_thread_id();
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uint64_t loop_cnt = 0;
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uint64_t begin, cycles;
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/* Register for report QS */
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rte_rcu_qsbr_thread_register(t[0], thread_id);
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/* Make the thread online */
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rte_rcu_qsbr_thread_online(t[0], thread_id);
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begin = rte_rdtsc_precise();
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if (writer_present) {
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while (!writer_done) {
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/* Update quiescent state counter */
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rte_rcu_qsbr_quiescent(t[0], thread_id);
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loop_cnt++;
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}
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} else {
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while (loop_cnt < 100000000) {
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/* Update quiescent state counter */
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rte_rcu_qsbr_quiescent(t[0], thread_id);
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loop_cnt++;
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}
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}
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cycles = rte_rdtsc_precise() - begin;
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rte_atomic64_add(&update_cycles, cycles);
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rte_atomic64_add(&updates, loop_cnt);
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/* Make the thread offline */
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rte_rcu_qsbr_thread_offline(t[0], thread_id);
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/* Unregister before exiting to avoid writer from waiting */
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rte_rcu_qsbr_thread_unregister(t[0], thread_id);
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return 0;
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}
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static int
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test_rcu_qsbr_writer_perf(void *arg)
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{
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bool wait = (bool)arg;
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uint64_t token = 0;
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uint64_t loop_cnt = 0;
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uint64_t begin, cycles;
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begin = rte_rdtsc_precise();
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do {
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/* Start the quiescent state query process */
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if (wait)
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token = rte_rcu_qsbr_start(t[0]);
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/* Check quiescent state status */
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rte_rcu_qsbr_check(t[0], token, wait);
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loop_cnt++;
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} while (loop_cnt < 20000000);
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cycles = rte_rdtsc_precise() - begin;
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rte_atomic64_add(&check_cycles, cycles);
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rte_atomic64_add(&checks, loop_cnt);
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return 0;
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}
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/*
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* Perf test: Reader/writer
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* Single writer, Multiple Readers, Single QS var, Non-Blocking rcu_qsbr_check
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*/
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static int
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test_rcu_qsbr_perf(void)
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{
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int i, sz;
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int tmp_num_cores;
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writer_done = 0;
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rte_atomic64_clear(&updates);
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rte_atomic64_clear(&update_cycles);
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rte_atomic64_clear(&checks);
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rte_atomic64_clear(&check_cycles);
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printf("\nPerf Test: %d Readers/1 Writer('wait' in qsbr_check == true)\n",
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num_cores - 1);
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__atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
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if (all_registered == 1)
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tmp_num_cores = num_cores - 1;
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else
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tmp_num_cores = TEST_RCU_MAX_LCORE;
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sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
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t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
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RTE_CACHE_LINE_SIZE);
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/* QS variable is initialized */
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rte_rcu_qsbr_init(t[0], tmp_num_cores);
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/* Reader threads are launched */
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for (i = 0; i < num_cores - 1; i++)
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rte_eal_remote_launch(test_rcu_qsbr_reader_perf, (void *)1,
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enabled_core_ids[i]);
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/* Writer thread is launched */
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rte_eal_remote_launch(test_rcu_qsbr_writer_perf,
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(void *)1, enabled_core_ids[i]);
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/* Wait for the writer thread */
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rte_eal_wait_lcore(enabled_core_ids[i]);
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writer_done = 1;
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/* Wait until all readers have exited */
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rte_eal_mp_wait_lcore();
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printf("Total RCU updates = %"PRIi64"\n", rte_atomic64_read(&updates));
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printf("Cycles per %d updates: %"PRIi64"\n", RCU_SCALE_DOWN,
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rte_atomic64_read(&update_cycles) /
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(rte_atomic64_read(&updates) / RCU_SCALE_DOWN));
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printf("Total RCU checks = %"PRIi64"\n", rte_atomic64_read(&checks));
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printf("Cycles per %d checks: %"PRIi64"\n", RCU_SCALE_DOWN,
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rte_atomic64_read(&check_cycles) /
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(rte_atomic64_read(&checks) / RCU_SCALE_DOWN));
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rte_free(t[0]);
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return 0;
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}
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/*
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* Perf test: Readers
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* Single writer, Multiple readers, Single QS variable
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*/
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static int
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test_rcu_qsbr_rperf(void)
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{
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int i, sz;
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int tmp_num_cores;
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rte_atomic64_clear(&updates);
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rte_atomic64_clear(&update_cycles);
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__atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
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printf("\nPerf Test: %d Readers\n", num_cores);
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if (all_registered == 1)
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tmp_num_cores = num_cores;
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else
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tmp_num_cores = TEST_RCU_MAX_LCORE;
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sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
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t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
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RTE_CACHE_LINE_SIZE);
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/* QS variable is initialized */
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rte_rcu_qsbr_init(t[0], tmp_num_cores);
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/* Reader threads are launched */
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for (i = 0; i < num_cores; i++)
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rte_eal_remote_launch(test_rcu_qsbr_reader_perf, NULL,
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enabled_core_ids[i]);
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/* Wait until all readers have exited */
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rte_eal_mp_wait_lcore();
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printf("Total RCU updates = %"PRIi64"\n", rte_atomic64_read(&updates));
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printf("Cycles per %d updates: %"PRIi64"\n", RCU_SCALE_DOWN,
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rte_atomic64_read(&update_cycles) /
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(rte_atomic64_read(&updates) / RCU_SCALE_DOWN));
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rte_free(t[0]);
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return 0;
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}
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/*
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* Perf test:
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* Multiple writer, Single QS variable, Non-blocking rcu_qsbr_check
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*/
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static int
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test_rcu_qsbr_wperf(void)
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{
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int i, sz;
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rte_atomic64_clear(&checks);
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rte_atomic64_clear(&check_cycles);
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__atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
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printf("\nPerf test: %d Writers ('wait' in qsbr_check == false)\n",
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num_cores);
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/* Number of readers does not matter for QS variable in this test
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* case as no reader will be registered.
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*/
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sz = rte_rcu_qsbr_get_memsize(TEST_RCU_MAX_LCORE);
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t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
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RTE_CACHE_LINE_SIZE);
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/* QS variable is initialized */
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rte_rcu_qsbr_init(t[0], TEST_RCU_MAX_LCORE);
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/* Writer threads are launched */
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for (i = 0; i < num_cores; i++)
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rte_eal_remote_launch(test_rcu_qsbr_writer_perf,
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(void *)0, enabled_core_ids[i]);
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/* Wait until all readers have exited */
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rte_eal_mp_wait_lcore();
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printf("Total RCU checks = %"PRIi64"\n", rte_atomic64_read(&checks));
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printf("Cycles per %d checks: %"PRIi64"\n", RCU_SCALE_DOWN,
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rte_atomic64_read(&check_cycles) /
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(rte_atomic64_read(&checks) / RCU_SCALE_DOWN));
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rte_free(t[0]);
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return 0;
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}
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/*
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* RCU test cases using rte_hash data structure.
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*/
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static int
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test_rcu_qsbr_hash_reader(void *arg)
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{
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struct rte_rcu_qsbr *temp;
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struct rte_hash *hash = NULL;
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int i;
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uint64_t loop_cnt = 0;
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uint64_t begin, cycles;
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uint32_t thread_id = alloc_thread_id();
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uint8_t read_type = (uint8_t)((uintptr_t)arg);
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uint32_t *pdata;
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temp = t[read_type];
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hash = h[read_type];
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rte_rcu_qsbr_thread_register(temp, thread_id);
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begin = rte_rdtsc_precise();
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do {
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rte_rcu_qsbr_thread_online(temp, thread_id);
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for (i = 0; i < TOTAL_ENTRY; i++) {
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rte_rcu_qsbr_lock(temp, thread_id);
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if (rte_hash_lookup_data(hash, keys+i,
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(void **)&pdata) != -ENOENT) {
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*pdata = 0;
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while (*pdata < COUNTER_VALUE)
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++*pdata;
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}
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rte_rcu_qsbr_unlock(temp, thread_id);
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}
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/* Update quiescent state counter */
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rte_rcu_qsbr_quiescent(temp, thread_id);
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rte_rcu_qsbr_thread_offline(temp, thread_id);
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loop_cnt++;
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} while (!writer_done);
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cycles = rte_rdtsc_precise() - begin;
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rte_atomic64_add(&update_cycles, cycles);
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rte_atomic64_add(&updates, loop_cnt);
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rte_rcu_qsbr_thread_unregister(temp, thread_id);
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return 0;
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}
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static struct rte_hash *
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init_hash(int hash_id)
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{
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int i;
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struct rte_hash *h = NULL;
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sprintf(hash_name[hash_id], "hash%d", hash_id);
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struct rte_hash_parameters hash_params = {
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.entries = TOTAL_ENTRY,
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.key_len = sizeof(uint32_t),
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.hash_func_init_val = 0,
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.socket_id = rte_socket_id(),
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.hash_func = rte_hash_crc,
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.extra_flag =
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RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY_LF,
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.name = hash_name[hash_id],
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};
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h = rte_hash_create(&hash_params);
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if (h == NULL) {
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printf("Hash create Failed\n");
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return NULL;
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}
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for (i = 0; i < TOTAL_ENTRY; i++) {
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hash_data[hash_id][i] = rte_zmalloc(NULL, sizeof(uint32_t), 0);
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if (hash_data[hash_id][i] == NULL) {
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printf("No memory\n");
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return NULL;
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}
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}
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keys = rte_malloc(NULL, sizeof(uint32_t) * TOTAL_ENTRY, 0);
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if (keys == NULL) {
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printf("No memory\n");
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return NULL;
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}
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for (i = 0; i < TOTAL_ENTRY; i++)
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keys[i] = i;
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for (i = 0; i < TOTAL_ENTRY; i++) {
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if (rte_hash_add_key_data(h, keys + i,
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(void *)((uintptr_t)hash_data[hash_id][i]))
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< 0) {
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printf("Hash key add Failed #%d\n", i);
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return NULL;
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}
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}
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return h;
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}
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/*
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* Functional test:
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* Single writer, Single QS variable Single QSBR query, Blocking rcu_qsbr_check
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*/
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static int
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test_rcu_qsbr_sw_sv_1qs(void)
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{
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uint64_t token, begin, cycles;
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int i, tmp_num_cores, sz;
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int32_t pos;
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writer_done = 0;
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rte_atomic64_clear(&updates);
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rte_atomic64_clear(&update_cycles);
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rte_atomic64_clear(&checks);
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rte_atomic64_clear(&check_cycles);
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__atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
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printf("\nPerf test: 1 writer, %d readers, 1 QSBR variable, 1 QSBR Query, Blocking QSBR Check\n", num_cores);
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if (all_registered == 1)
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tmp_num_cores = num_cores;
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else
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tmp_num_cores = TEST_RCU_MAX_LCORE;
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sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
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t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
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RTE_CACHE_LINE_SIZE);
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/* QS variable is initialized */
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rte_rcu_qsbr_init(t[0], tmp_num_cores);
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/* Shared data structure created */
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h[0] = init_hash(0);
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if (h[0] == NULL) {
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printf("Hash init failed\n");
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goto error;
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}
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/* Reader threads are launched */
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for (i = 0; i < num_cores; i++)
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rte_eal_remote_launch(test_rcu_qsbr_hash_reader, NULL,
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enabled_core_ids[i]);
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begin = rte_rdtsc_precise();
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for (i = 0; i < TOTAL_ENTRY; i++) {
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/* Delete elements from the shared data structure */
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pos = rte_hash_del_key(h[0], keys + i);
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if (pos < 0) {
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printf("Delete key failed #%d\n", keys[i]);
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goto error;
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}
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/* Start the quiescent state query process */
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token = rte_rcu_qsbr_start(t[0]);
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/* Check the quiescent state status */
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rte_rcu_qsbr_check(t[0], token, true);
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if (*hash_data[0][i] != COUNTER_VALUE &&
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*hash_data[0][i] != 0) {
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printf("Reader did not complete #%d = %d\n", i,
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*hash_data[0][i]);
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goto error;
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}
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if (rte_hash_free_key_with_position(h[0], pos) < 0) {
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printf("Failed to free the key #%d\n", keys[i]);
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goto error;
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}
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rte_free(hash_data[0][i]);
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hash_data[0][i] = NULL;
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}
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cycles = rte_rdtsc_precise() - begin;
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rte_atomic64_add(&check_cycles, cycles);
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rte_atomic64_add(&checks, i);
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writer_done = 1;
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/* Wait and check return value from reader threads */
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for (i = 0; i < num_cores; i++)
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if (rte_eal_wait_lcore(enabled_core_ids[i]) < 0)
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goto error;
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rte_hash_free(h[0]);
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rte_free(keys);
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printf("Following numbers include calls to rte_hash functions\n");
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printf("Cycles per 1 update(online/update/offline): %"PRIi64"\n",
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rte_atomic64_read(&update_cycles) /
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rte_atomic64_read(&updates));
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printf("Cycles per 1 check(start, check): %"PRIi64"\n\n",
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rte_atomic64_read(&check_cycles) /
|
|
rte_atomic64_read(&checks));
|
|
|
|
rte_free(t[0]);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
writer_done = 1;
|
|
/* Wait until all readers have exited */
|
|
rte_eal_mp_wait_lcore();
|
|
|
|
rte_hash_free(h[0]);
|
|
rte_free(keys);
|
|
for (i = 0; i < TOTAL_ENTRY; i++)
|
|
rte_free(hash_data[0][i]);
|
|
|
|
rte_free(t[0]);
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Functional test:
|
|
* Single writer, Single QS variable, Single QSBR query,
|
|
* Non-blocking rcu_qsbr_check
|
|
*/
|
|
static int
|
|
test_rcu_qsbr_sw_sv_1qs_non_blocking(void)
|
|
{
|
|
uint64_t token, begin, cycles;
|
|
int i, ret, tmp_num_cores, sz;
|
|
int32_t pos;
|
|
|
|
writer_done = 0;
|
|
|
|
printf("Perf test: 1 writer, %d readers, 1 QSBR variable, 1 QSBR Query, Non-Blocking QSBR check\n", num_cores);
|
|
|
|
__atomic_store_n(&thr_id, 0, __ATOMIC_SEQ_CST);
|
|
|
|
if (all_registered == 1)
|
|
tmp_num_cores = num_cores;
|
|
else
|
|
tmp_num_cores = TEST_RCU_MAX_LCORE;
|
|
|
|
sz = rte_rcu_qsbr_get_memsize(tmp_num_cores);
|
|
t[0] = (struct rte_rcu_qsbr *)rte_zmalloc("rcu0", sz,
|
|
RTE_CACHE_LINE_SIZE);
|
|
/* QS variable is initialized */
|
|
rte_rcu_qsbr_init(t[0], tmp_num_cores);
|
|
|
|
/* Shared data structure created */
|
|
h[0] = init_hash(0);
|
|
if (h[0] == NULL) {
|
|
printf("Hash init failed\n");
|
|
goto error;
|
|
}
|
|
|
|
/* Reader threads are launched */
|
|
for (i = 0; i < num_cores; i++)
|
|
rte_eal_remote_launch(test_rcu_qsbr_hash_reader, NULL,
|
|
enabled_core_ids[i]);
|
|
|
|
begin = rte_rdtsc_precise();
|
|
|
|
for (i = 0; i < TOTAL_ENTRY; i++) {
|
|
/* Delete elements from the shared data structure */
|
|
pos = rte_hash_del_key(h[0], keys + i);
|
|
if (pos < 0) {
|
|
printf("Delete key failed #%d\n", keys[i]);
|
|
goto error;
|
|
}
|
|
/* Start the quiescent state query process */
|
|
token = rte_rcu_qsbr_start(t[0]);
|
|
|
|
/* Check the quiescent state status */
|
|
do {
|
|
ret = rte_rcu_qsbr_check(t[0], token, false);
|
|
} while (ret == 0);
|
|
if (*hash_data[0][i] != COUNTER_VALUE &&
|
|
*hash_data[0][i] != 0) {
|
|
printf("Reader did not complete #%d = %d\n", i,
|
|
*hash_data[0][i]);
|
|
goto error;
|
|
}
|
|
|
|
if (rte_hash_free_key_with_position(h[0], pos) < 0) {
|
|
printf("Failed to free the key #%d\n", keys[i]);
|
|
goto error;
|
|
}
|
|
rte_free(hash_data[0][i]);
|
|
hash_data[0][i] = NULL;
|
|
}
|
|
|
|
cycles = rte_rdtsc_precise() - begin;
|
|
rte_atomic64_add(&check_cycles, cycles);
|
|
rte_atomic64_add(&checks, i);
|
|
|
|
writer_done = 1;
|
|
/* Wait and check return value from reader threads */
|
|
for (i = 0; i < num_cores; i++)
|
|
if (rte_eal_wait_lcore(enabled_core_ids[i]) < 0)
|
|
goto error;
|
|
rte_hash_free(h[0]);
|
|
rte_free(keys);
|
|
|
|
printf("Following numbers include calls to rte_hash functions\n");
|
|
printf("Cycles per 1 update(online/update/offline): %"PRIi64"\n",
|
|
rte_atomic64_read(&update_cycles) /
|
|
rte_atomic64_read(&updates));
|
|
|
|
printf("Cycles per 1 check(start, check): %"PRIi64"\n\n",
|
|
rte_atomic64_read(&check_cycles) /
|
|
rte_atomic64_read(&checks));
|
|
|
|
rte_free(t[0]);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
writer_done = 1;
|
|
/* Wait until all readers have exited */
|
|
rte_eal_mp_wait_lcore();
|
|
|
|
rte_hash_free(h[0]);
|
|
rte_free(keys);
|
|
for (i = 0; i < TOTAL_ENTRY; i++)
|
|
rte_free(hash_data[0][i]);
|
|
|
|
rte_free(t[0]);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
test_rcu_qsbr_main(void)
|
|
{
|
|
rte_atomic64_init(&updates);
|
|
rte_atomic64_init(&update_cycles);
|
|
rte_atomic64_init(&checks);
|
|
rte_atomic64_init(&check_cycles);
|
|
|
|
if (get_enabled_cores_mask() != 0)
|
|
return -1;
|
|
|
|
printf("Number of cores provided = %d\n", num_cores);
|
|
if (num_cores < 2) {
|
|
printf("Test failed! Need 2 or more cores\n");
|
|
goto test_fail;
|
|
}
|
|
if (num_cores > TEST_RCU_MAX_LCORE) {
|
|
printf("Test failed! %d cores supported\n", TEST_RCU_MAX_LCORE);
|
|
goto test_fail;
|
|
}
|
|
|
|
printf("Perf test with all reader threads registered\n");
|
|
printf("--------------------------------------------\n");
|
|
all_registered = 1;
|
|
|
|
if (test_rcu_qsbr_perf() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_rperf() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_wperf() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_sw_sv_1qs() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_sw_sv_1qs_non_blocking() < 0)
|
|
goto test_fail;
|
|
|
|
/* Make sure the actual number of cores provided is less than
|
|
* TEST_RCU_MAX_LCORE. This will allow for some threads not
|
|
* to be registered on the QS variable.
|
|
*/
|
|
if (num_cores >= TEST_RCU_MAX_LCORE) {
|
|
printf("Test failed! number of cores provided should be less than %d\n",
|
|
TEST_RCU_MAX_LCORE);
|
|
goto test_fail;
|
|
}
|
|
|
|
printf("Perf test with some of reader threads registered\n");
|
|
printf("------------------------------------------------\n");
|
|
all_registered = 0;
|
|
|
|
if (test_rcu_qsbr_perf() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_rperf() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_wperf() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_sw_sv_1qs() < 0)
|
|
goto test_fail;
|
|
|
|
if (test_rcu_qsbr_sw_sv_1qs_non_blocking() < 0)
|
|
goto test_fail;
|
|
|
|
printf("\n");
|
|
|
|
return 0;
|
|
|
|
test_fail:
|
|
return -1;
|
|
}
|
|
|
|
REGISTER_TEST_COMMAND(rcu_qsbr_perf_autotest, test_rcu_qsbr_main);
|