--- /dev/null
+/*
+ * test_urcu.c
+ *
+ * Userspace RCU library - test program
+ *
+ * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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 <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 <sched.h>
+#include <errno.h>
+
+#include <urcu/arch.h>
+
+#ifdef __linux__
+#include <syscall.h>
+#endif
+
+/* 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-qsbr.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;
+
+/* write-side C.S. duration, in loops */
+static unsigned long wduration;
+
+static inline void loop_sleep(unsigned long l)
+{
+ while(l-- != 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;
+
+#ifndef HAVE_CPU_SET_T
+typedef unsigned long cpu_set_t;
+# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
+# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
+#endif
+
+static void set_affinity(void)
+{
+ cpu_set_t mask;
+ int cpu;
+ int ret;
+
+ 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 unsigned long long __thread nr_writes;
+static unsigned long long __thread 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);
+ }
+}
+
+/*
+ * malloc/free are reusing memory areas too quickly, which does not let us
+ * test races appropriately. Use a large circular array for allocations.
+ * ARRAY_SIZE is larger than nr_writers, and we keep the mutex across
+ * both alloc and free, which insures we never run over our tail.
+ */
+#define ARRAY_SIZE (1048576 * nr_writers)
+#define ARRAY_POISON 0xDEADBEEF
+static int array_index;
+static struct test_array *test_array;
+
+static struct test_array *test_array_alloc(void)
+{
+ struct test_array *ret;
+ int index;
+
+ index = array_index % ARRAY_SIZE;
+ assert(test_array[index].a == ARRAY_POISON ||
+ test_array[index].a == 0);
+ ret = &test_array[index];
+ array_index++;
+ if (array_index == ARRAY_SIZE)
+ array_index = 0;
+ return ret;
+}
+
+static void test_array_free(struct test_array *ptr)
+{
+ if (!ptr)
+ return;
+ ptr->a = ARRAY_POISON;
+}
+
+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)
+ {
+ }
+ cmm_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++;
+ /* QS each 1024 reads */
+ if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
+ rcu_quiescent_state();
+ if (unlikely(!test_duration_read()))
+ break;
+ }
+
+ rcu_unregister_thread();
+
+ /* test extra thread registration */
+ rcu_register_thread();
+ 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 *_count)
+{
+ unsigned long long *count = _count;
+ struct test_array *new, *old;
+
+ printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
+
+ set_affinity();
+
+ while (!test_go)
+ {
+ }
+ cmm_smp_mb();
+
+ for (;;) {
+ rcu_copy_mutex_lock();
+ new = test_array_alloc();
+ new->a = 8;
+ old = rcu_xchg_pointer(&test_rcu_pointer, new);
+ if (unlikely(wduration))
+ loop_sleep(wduration);
+ synchronize_rcu();
+ /* can be done after unlock */
+ if (old)
+ old->a = 0;
+ test_array_free(old);
+ rcu_copy_mutex_unlock();
+ nr_writes++;
+ if (unlikely(!test_duration_write()))
+ break;
+ if (unlikely(wdelay))
+ loop_sleep(wdelay);
+ }
+
+ printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
+ *count = 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(" [-e duration] (writer 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, *count_writer;
+ 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 '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, thread id : %lx, tid %lu\n",
+ "main", pthread_self(), (unsigned long)gettid());
+
+ test_array = calloc(1, sizeof(*test_array) * ARRAY_SIZE);
+ tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
+ tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
+ count_reader = malloc(sizeof(*count_reader) * nr_readers);
+ count_writer = malloc(sizeof(*count_writer) * 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,
+ &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);
+ test_array_free(test_rcu_pointer);
+ free(test_array);
+ free(tid_reader);
+ free(tid_writer);
+ free(count_reader);
+ free(count_writer);
+ return 0;
+}
--- /dev/null
+/*
+ * test_urcu_gc.c
+ *
+ * Userspace RCU library - test program (with baatch reclamation)
+ *
+ * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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 <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 <sched.h>
+#include <errno.h>
+
+#include <urcu/arch.h>
+
+#ifdef __linux__
+#include <syscall.h>
+#endif
+
+/* 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
+
+#define _LGPL_SOURCE
+#include <urcu-qsbr.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 unsigned int reclaim_batch = 1;
+
+struct reclaim_queue {
+ void **queue; /* Beginning of queue */
+ void **head; /* Insert position */
+};
+
+static struct reclaim_queue *pending_reclaims;
+
+
+/* write-side C.S. duration, in loops */
+static unsigned long wduration;
+
+static inline void loop_sleep(unsigned long l)
+{
+ while(l-- != 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;
+
+#ifndef HAVE_CPU_SET_T
+typedef unsigned long cpu_set_t;
+# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
+# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
+#endif
+
+static void set_affinity(void)
+{
+ cpu_set_t mask;
+ int cpu;
+ int ret;
+
+ 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 unsigned long long __thread nr_writes;
+static unsigned long long __thread nr_reads;
+
+static unsigned int nr_readers;
+static unsigned int nr_writers;
+
+pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
+static
+unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
+
+
+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)
+ {
+ }
+ cmm_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++;
+ /* QS each 1024 reads */
+ if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
+ _rcu_quiescent_state();
+ 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);
+
+}
+
+static void rcu_gc_clear_queue(unsigned long wtidx)
+{
+ void **p;
+
+ /* Wait for Q.S and empty queue */
+ synchronize_rcu();
+
+ for (p = pending_reclaims[wtidx].queue;
+ p < pending_reclaims[wtidx].head; p++) {
+ /* poison */
+ if (*p)
+ ((struct test_array *)*p)->a = 0;
+ free(*p);
+ }
+ pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue;
+}
+
+/* Using per-thread queue */
+static void rcu_gc_reclaim(unsigned long wtidx, void *old)
+{
+ /* Queue pointer */
+ *pending_reclaims[wtidx].head = old;
+ pending_reclaims[wtidx].head++;
+
+ if (likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue
+ < reclaim_batch))
+ return;
+
+ rcu_gc_clear_queue(wtidx);
+}
+
+void *thr_writer(void *data)
+{
+ unsigned long wtidx = (unsigned long)data;
+#ifdef TEST_LOCAL_GC
+ struct test_array *old = NULL;
+#else
+ struct test_array *new, *old;
+#endif
+
+ printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
+
+ set_affinity();
+
+ while (!test_go)
+ {
+ }
+ cmm_smp_mb();
+
+ for (;;) {
+#ifndef TEST_LOCAL_GC
+ new = malloc(sizeof(*new));
+ new->a = 8;
+ old = _rcu_xchg_pointer(&test_rcu_pointer, new);
+#endif
+ if (unlikely(wduration))
+ loop_sleep(wduration);
+ rcu_gc_reclaim(wtidx, old);
+ nr_writes++;
+ if (unlikely(!test_duration_write()))
+ break;
+ if (unlikely(wdelay))
+ loop_sleep(wdelay);
+ }
+
+ 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(" [-b batch] (batch reclaim)");
+ printf(" [-d delay] (writer period (us))");
+ printf(" [-c duration] (reader C.S. duration (in loops))");
+ printf(" [-e duration] (writer 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 'b':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ return -1;
+ }
+ reclaim_batch = atol(argv[++i]);
+ 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, 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);
+ pending_reclaims = malloc(sizeof(*pending_reclaims) * nr_writers);
+ if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
+ < CAA_CACHE_LINE_SIZE)
+ for (i = 0; i < nr_writers; i++)
+ pending_reclaims[i].queue = calloc(1, CAA_CACHE_LINE_SIZE);
+ else
+ for (i = 0; i < nr_writers; i++)
+ pending_reclaims[i].queue = calloc(reclaim_batch,
+ sizeof(*pending_reclaims[i].queue));
+ for (i = 0; i < nr_writers; i++)
+ pending_reclaims[i].head = pending_reclaims[i].queue;
+
+ 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);
+ }
+
+ 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 += tot_nr_writes[i];
+ rcu_gc_clear_queue(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 "
+ "batch %u\n",
+ argv[0], duration, nr_readers, rduration, wduration,
+ nr_writers, wdelay, tot_reads, tot_writes,
+ tot_reads + tot_writes, reclaim_batch);
+ free(tid_reader);
+ free(tid_writer);
+ free(count_reader);
+ free(tot_nr_writes);
+ for (i = 0; i < nr_writers; i++)
+ free(pending_reclaims[i].queue);
+ free(pending_reclaims);
+
+ return 0;
+}
--- /dev/null
+/*
+ * test_qsbr_timing.c
+ *
+ * Userspace QSBR - test program
+ *
+ * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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.
+ */
+
+#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 <errno.h>
+
+#include <urcu/arch.h>
+
+#ifdef __linux__
+#include <syscall.h>
+#endif
+
+#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
+
+#define _LGPL_SOURCE
+#include <urcu-qsbr.h>
+
+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);
+ }
+}
+
+struct test_array {
+ int a;
+};
+
+static struct test_array *test_rcu_pointer;
+
+#define OUTER_READ_LOOP 2000U
+#define INNER_READ_LOOP 100000U
+#define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
+
+#define OUTER_WRITE_LOOP 10U
+#define INNER_WRITE_LOOP 200U
+#define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
+
+static int num_read;
+static int num_write;
+
+#define NR_READ num_read
+#define NR_WRITE num_write
+
+static cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time;
+static cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time;
+
+void *thr_reader(void *arg)
+{
+ int i, j;
+ struct test_array *local_ptr;
+ cycles_t time1, time2;
+
+ printf("thread_begin %s, thread id : %lx, tid %lu\n",
+ "reader", pthread_self(), (unsigned long)gettid());
+ sleep(2);
+
+ rcu_register_thread();
+
+ time1 = caa_get_cycles();
+ for (i = 0; i < OUTER_READ_LOOP; i++) {
+ for (j = 0; j < INNER_READ_LOOP; j++) {
+ _rcu_read_lock();
+ local_ptr = _rcu_dereference(test_rcu_pointer);
+ if (local_ptr) {
+ assert(local_ptr->a == 8);
+ }
+ _rcu_read_unlock();
+ }
+ _rcu_quiescent_state();
+ }
+ time2 = caa_get_cycles();
+
+ rcu_unregister_thread();
+
+ reader_time[(unsigned long)arg] = time2 - time1;
+
+ sleep(2);
+ printf("thread_end %s, thread id : %lx, tid %lu\n",
+ "reader", pthread_self(), (unsigned long)gettid());
+ return ((void*)1);
+
+}
+
+void *thr_writer(void *arg)
+{
+ int i, j;
+ struct test_array *new, *old;
+ cycles_t time1, time2;
+
+ printf("thread_begin %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
+ sleep(2);
+
+ for (i = 0; i < OUTER_WRITE_LOOP; i++) {
+ for (j = 0; j < INNER_WRITE_LOOP; j++) {
+ time1 = caa_get_cycles();
+ new = malloc(sizeof(struct test_array));
+ rcu_copy_mutex_lock();
+ old = test_rcu_pointer;
+ if (old) {
+ assert(old->a == 8);
+ }
+ new->a = 8;
+ old = rcu_xchg_pointer(&test_rcu_pointer, new);
+ rcu_copy_mutex_unlock();
+ synchronize_rcu();
+ /* can be done after unlock */
+ if (old) {
+ old->a = 0;
+ }
+ free(old);
+ time2 = caa_get_cycles();
+ writer_time[(unsigned long)arg] += time2 - time1;
+ usleep(1);
+ }
+ }
+
+ printf("thread_end %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
+ return ((void*)2);
+}
+
+int main(int argc, char **argv)
+{
+ int err;
+ pthread_t *tid_reader, *tid_writer;
+ void *tret;
+ int i;
+ cycles_t tot_rtime = 0;
+ cycles_t tot_wtime = 0;
+
+ if (argc < 2) {
+ printf("Usage : %s nr_readers nr_writers\n", argv[0]);
+ exit(-1);
+ }
+ num_read = atoi(argv[1]);
+ num_write = atoi(argv[2]);
+
+ reader_time = malloc(sizeof(*reader_time) * num_read);
+ writer_time = malloc(sizeof(*writer_time) * num_write);
+ tid_reader = malloc(sizeof(*tid_reader) * num_read);
+ tid_writer = malloc(sizeof(*tid_writer) * num_write);
+
+ printf("thread %-6s, thread id : %lx, tid %lu\n",
+ "main", pthread_self(), (unsigned long)gettid());
+
+ for (i = 0; i < NR_READ; i++) {
+ err = pthread_create(&tid_reader[i], NULL, thr_reader,
+ (void *)(long)i);
+ if (err != 0)
+ exit(1);
+ }
+ for (i = 0; i < NR_WRITE; i++) {
+ err = pthread_create(&tid_writer[i], NULL, thr_writer,
+ (void *)(long)i);
+ if (err != 0)
+ exit(1);
+ }
+
+ sleep(10);
+
+ for (i = 0; i < NR_READ; i++) {
+ err = pthread_join(tid_reader[i], &tret);
+ if (err != 0)
+ exit(1);
+ tot_rtime += reader_time[i];
+ }
+ for (i = 0; i < NR_WRITE; i++) {
+ err = pthread_join(tid_writer[i], &tret);
+ if (err != 0)
+ exit(1);
+ tot_wtime += writer_time[i];
+ }
+ free(test_rcu_pointer);
+ printf("Time per read : %g cycles\n",
+ (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
+ printf("Time per write : %g cycles\n",
+ (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
+
+ free(reader_time);
+ free(writer_time);
+ free(tid_reader);
+ free(tid_writer);
+
+ return 0;
+}
projects / userspace-rcu.git / commitdiff
