+++ /dev/null
-/*
- * test_urcu_reclaim.c
- *
- * Userspace RCU library - test program (with automatic reclamation)
- *
- * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <pthread.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <assert.h>
-#include <sys/syscall.h>
-#include <sched.h>
-
-#include "../arch.h"
-
-/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
-#define CACHE_LINE_SIZE 4096
-
-/* hardcoded number of CPUs */
-#define NR_CPUS 16384
-
-#if defined(_syscall0)
-_syscall0(pid_t, gettid)
-#elif defined(__NR_gettid)
-static inline pid_t gettid(void)
-{
- return syscall(__NR_gettid);
-}
-#else
-#warning "use pid as tid"
-static inline pid_t gettid(void)
-{
- return getpid();
-}
-#endif
-
-#ifndef DYNAMIC_LINK_TEST
-#define _LGPL_SOURCE
-#else
-#define debug_yield_read()
-#endif
-#include "../urcu.h"
-#include "../urcu-reclaim.h"
-
-struct test_array {
- int a;
-};
-
-static volatile int test_go, test_stop;
-
-static unsigned long wdelay;
-
-static struct test_array *test_rcu_pointer;
-
-static unsigned long duration;
-
-/* read-side C.S. duration, in loops */
-static unsigned long rduration;
-
-static inline void loop_sleep(unsigned long l)
-{
- while(l-- != 0)
- cpu_relax();
-}
-
-static int verbose_mode;
-
-#define printf_verbose(fmt, args...) \
- do { \
- if (verbose_mode) \
- printf(fmt, args); \
- } while (0)
-
-static unsigned int cpu_affinities[NR_CPUS];
-static unsigned int next_aff = 0;
-static int use_affinity = 0;
-
-pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-static void set_affinity(void)
-{
- cpu_set_t mask;
- int cpu;
- int ret;
-
- if (!use_affinity)
- return;
-
- ret = pthread_mutex_lock(&affinity_mutex);
- if (ret) {
- perror("Error in pthread mutex lock");
- exit(-1);
- }
- cpu = cpu_affinities[next_aff++];
- ret = pthread_mutex_unlock(&affinity_mutex);
- if (ret) {
- perror("Error in pthread mutex unlock");
- exit(-1);
- }
- CPU_ZERO(&mask);
- CPU_SET(cpu, &mask);
- sched_setaffinity(0, sizeof(mask), &mask);
-}
-
-/*
- * returns 0 if test should end.
- */
-static int test_duration_write(void)
-{
- return !test_stop;
-}
-
-static int test_duration_read(void)
-{
- return !test_stop;
-}
-
-static unsigned long long __thread nr_writes;
-static unsigned long long __thread nr_reads;
-
-static
-unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
-
-static unsigned int nr_readers;
-static unsigned int nr_writers;
-
-pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-void rcu_copy_mutex_lock(void)
-{
- int ret;
- ret = pthread_mutex_lock(&rcu_copy_mutex);
- if (ret) {
- perror("Error in pthread mutex lock");
- exit(-1);
- }
-}
-
-void rcu_copy_mutex_unlock(void)
-{
- int ret;
-
- ret = pthread_mutex_unlock(&rcu_copy_mutex);
- if (ret) {
- perror("Error in pthread mutex unlock");
- exit(-1);
- }
-}
-
-void *thr_reader(void *_count)
-{
- unsigned long long *count = _count;
- struct test_array *local_ptr;
-
- printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "reader", pthread_self(), (unsigned long)gettid());
-
- set_affinity();
-
- rcu_register_thread();
-
- while (!test_go)
- {
- }
- smp_mb();
-
- for (;;) {
- rcu_read_lock();
- local_ptr = rcu_dereference(test_rcu_pointer);
- debug_yield_read();
- if (local_ptr)
- assert(local_ptr->a == 8);
- if (unlikely(rduration))
- loop_sleep(rduration);
- rcu_read_unlock();
- nr_reads++;
- if (unlikely(!test_duration_read()))
- break;
- }
-
- rcu_unregister_thread();
-
- *count = nr_reads;
- printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
- "reader", pthread_self(), (unsigned long)gettid());
- return ((void*)1);
-
-}
-
-void *thr_writer(void *data)
-{
- unsigned long wtidx = (unsigned long)data;
- struct test_array *new, *old = NULL;
-
- printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "writer", pthread_self(), (unsigned long)gettid());
-
- set_affinity();
-
- rcu_reclaim_register_thread();
-
- while (!test_go)
- {
- }
- smp_mb();
-
- for (;;) {
- new = malloc(sizeof(*new));
- new->a = 8;
- old = rcu_xchg_pointer(&test_rcu_pointer, new);
- rcu_reclaim_queue(old);
- nr_writes++;
- if (unlikely(!test_duration_write()))
- break;
- if (unlikely(wdelay))
- loop_sleep(wdelay);
- }
-
- rcu_reclaim_unregister_thread();
-
- printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
- "writer", pthread_self(), (unsigned long)gettid());
- tot_nr_writes[wtidx] = nr_writes;
- return ((void*)2);
-}
-
-void show_usage(int argc, char **argv)
-{
- printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
-#ifdef DEBUG_YIELD
- printf(" [-r] [-w] (yield reader and/or writer)");
-#endif
- printf(" [-d delay] (writer period (us))");
- printf(" [-c duration] (reader C.S. duration (in loops))");
- printf(" [-v] (verbose output)");
- printf(" [-a cpu#] [-a cpu#]... (affinity)");
- printf("\n");
-}
-
-int main(int argc, char **argv)
-{
- int err;
- pthread_t *tid_reader, *tid_writer;
- void *tret;
- unsigned long long *count_reader;
- unsigned long long tot_reads = 0, tot_writes = 0;
- int i, a;
-
- if (argc < 4) {
- show_usage(argc, argv);
- return -1;
- }
-
- err = sscanf(argv[1], "%u", &nr_readers);
- if (err != 1) {
- show_usage(argc, argv);
- return -1;
- }
-
- err = sscanf(argv[2], "%u", &nr_writers);
- if (err != 1) {
- show_usage(argc, argv);
- return -1;
- }
-
- err = sscanf(argv[3], "%lu", &duration);
- if (err != 1) {
- show_usage(argc, argv);
- return -1;
- }
-
- for (i = 4; i < argc; i++) {
- if (argv[i][0] != '-')
- continue;
- switch (argv[i][1]) {
-#ifdef DEBUG_YIELD
- case 'r':
- yield_active |= YIELD_READ;
- break;
- case 'w':
- yield_active |= YIELD_WRITE;
- break;
-#endif
- case 'a':
- if (argc < i + 2) {
- show_usage(argc, argv);
- return -1;
- }
- a = atoi(argv[++i]);
- cpu_affinities[next_aff++] = a;
- use_affinity = 1;
- printf_verbose("Adding CPU %d affinity\n", a);
- break;
- case 'c':
- if (argc < i + 2) {
- show_usage(argc, argv);
- return -1;
- }
- rduration = atol(argv[++i]);
- break;
- case 'd':
- if (argc < i + 2) {
- show_usage(argc, argv);
- return -1;
- }
- wdelay = atol(argv[++i]);
- break;
- case 'v':
- verbose_mode = 1;
- break;
- }
- }
-
- printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
- duration, nr_readers, nr_writers);
- printf_verbose("Writer delay : %lu loops.\n", wdelay);
- printf_verbose("Reader duration : %lu loops.\n", rduration);
- printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
- "main", pthread_self(), (unsigned long)gettid());
-
- tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
- tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
- count_reader = malloc(sizeof(*count_reader) * nr_readers);
- tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
-
- next_aff = 0;
-
- for (i = 0; i < nr_readers; i++) {
- err = pthread_create(&tid_reader[i], NULL, thr_reader,
- &count_reader[i]);
- if (err != 0)
- exit(1);
- }
- for (i = 0; i < nr_writers; i++) {
- err = pthread_create(&tid_writer[i], NULL, thr_writer,
- (void *)(long)i);
- if (err != 0)
- exit(1);
- }
-
- smp_mb();
-
- test_go = 1;
-
- sleep(duration);
-
- test_stop = 1;
-
- for (i = 0; i < nr_readers; i++) {
- err = pthread_join(tid_reader[i], &tret);
- if (err != 0)
- exit(1);
- tot_reads += count_reader[i];
- }
- for (i = 0; i < nr_writers; i++) {
- err = pthread_join(tid_writer[i], &tret);
- if (err != 0)
- exit(1);
- tot_writes += tot_nr_writes[i];
- }
-
- printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
- tot_writes);
- printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
- "nr_writers %3u "
- "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
- argv[0], duration, nr_readers, rduration,
- nr_writers, wdelay, tot_reads, tot_writes,
- tot_reads + tot_writes);
- free(tid_reader);
- free(tid_writer);
- free(count_reader);
- free(tot_nr_writes);
-
- return 0;
-}
projects / urcu.git / blobdiff