X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=tests%2Ftest_rwlock.c;fp=tests%2Ftest_rwlock.c;h=0000000000000000000000000000000000000000;hp=5a0e8c190410c7e2402cc411f650f4a1ee740cd4;hb=f5ab766ee2c8300cb00ca5878b1cb464f960a66d;hpb=a5bae03d59c22e57263b8610b9fed99738303cf0 diff --git a/tests/test_rwlock.c b/tests/test_rwlock.c deleted file mode 100644 index 5a0e8c1..0000000 --- a/tests/test_rwlock.c +++ /dev/null @@ -1,391 +0,0 @@ -/* - * test_urcu.c - * - * Userspace RCU library - test program - * - * Copyright February 2009 - Mathieu Desnoyers - * - * 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 "../config.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include "cpuset.h" -#include "thread-id.h" - -/* hardcoded number of CPUs */ -#define NR_CPUS 16384 - -#ifndef DYNAMIC_LINK_TEST -#define _LGPL_SOURCE -#else -#define debug_yield_read() -#endif -#include - -struct test_array { - int a; -}; - -pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER; - -static volatile int test_go, test_stop; - -static unsigned long wdelay; - -static volatile struct test_array test_array = { 8 }; - -static unsigned long duration; - -/* read-side C.S. duration, in loops */ -static unsigned long rduration; - -/* write-side C.S. duration, in loops */ -static unsigned long wduration; - -static inline void loop_sleep(unsigned long loops) -{ - while (loops-- != 0) - caa_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) -{ -#if HAVE_SCHED_SETAFFINITY - cpu_set_t mask; - int cpu, ret; -#endif /* HAVE_SCHED_SETAFFINITY */ - - if (!use_affinity) - return; - -#if HAVE_SCHED_SETAFFINITY - 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); -#if SCHED_SETAFFINITY_ARGS == 2 - sched_setaffinity(0, &mask); -#else - sched_setaffinity(0, sizeof(mask), &mask); -#endif -#endif /* HAVE_SCHED_SETAFFINITY */ -} - -/* - * 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 DEFINE_URCU_TLS(unsigned long long, nr_writes); -static DEFINE_URCU_TLS(unsigned long long, nr_reads); - -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; - - printf_verbose("thread_begin %s, tid %lu\n", - "reader", urcu_get_thread_id()); - - set_affinity(); - - while (!test_go) - { - } - - for (;;) { - pthread_rwlock_rdlock(&lock); - assert(test_array.a == 8); - if (caa_unlikely(rduration)) - loop_sleep(rduration); - pthread_rwlock_unlock(&lock); - URCU_TLS(nr_reads)++; - if (caa_unlikely(!test_duration_read())) - break; - } - - *count = URCU_TLS(nr_reads); - printf_verbose("thread_end %s, tid %lu\n", - "reader", urcu_get_thread_id()); - return ((void*)1); - -} - -void *thr_writer(void *_count) -{ - unsigned long long *count = _count; - - printf_verbose("thread_begin %s, tid %lu\n", - "writer", urcu_get_thread_id()); - - set_affinity(); - - while (!test_go) - { - } - cmm_smp_mb(); - - for (;;) { - pthread_rwlock_wrlock(&lock); - test_array.a = 0; - test_array.a = 8; - if (caa_unlikely(wduration)) - loop_sleep(wduration); - pthread_rwlock_unlock(&lock); - URCU_TLS(nr_writes)++; - if (caa_unlikely(!test_duration_write())) - break; - if (caa_unlikely(wdelay)) - loop_sleep(wdelay); - } - - printf_verbose("thread_end %s, tid %lu\n", - "writer", urcu_get_thread_id()); - *count = URCU_TLS(nr_writes); - return ((void*)2); -} - -void show_usage(int argc, char **argv) -{ - printf("Usage : %s nr_readers nr_writers duration (s) \n", - argv[0]); - printf("OPTIONS:\n"); -#ifdef DEBUG_YIELD - printf(" [-r] [-w] (yield reader and/or writer)\n"); -#endif - printf(" [-d delay] (writer period (us))\n"); - printf(" [-c duration] (reader C.S. duration (in loops))\n"); - printf(" [-e duration] (writer C.S. duration (in loops))\n"); - printf(" [-v] (verbose output)\n"); - printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); - printf("\n"); -} - -int main(int argc, char **argv) -{ - int err; - pthread_t *tid_reader, *tid_writer; - void *tret; - unsigned long long *count_reader, *count_writer; - unsigned long long tot_reads = 0, tot_writes = 0; - int i, a; - - if (argc < 4) { - show_usage(argc, argv); - return -1; - } - cmm_smp_mb(); - - 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 'e': - if (argc < i + 2) { - show_usage(argc, argv); - return -1; - } - wduration = 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, tid %lu\n", - "main", urcu_get_thread_id()); - - tid_reader = calloc(nr_readers, sizeof(*tid_reader)); - tid_writer = calloc(nr_writers, sizeof(*tid_writer)); - count_reader = calloc(nr_readers, sizeof(*count_reader)); - count_writer = calloc(nr_writers, sizeof(*count_writer)); - - 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, - &count_writer[i]); - if (err != 0) - exit(1); - } - - cmm_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 += count_writer[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 wdur %6lu " - "nr_writers %3u " - "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", - argv[0], duration, nr_readers, rduration, wduration, - nr_writers, wdelay, tot_reads, tot_writes, - tot_reads + tot_writes); - - free(tid_reader); - free(tid_writer); - free(count_reader); - free(count_writer); - return 0; -}