[urcu.git] / tests / test_rwlock.c

/*
 * test_urcu.c
 *
 * Userspace RCU library - test program
 *
 * 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 <urcu/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>

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;

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 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, thread id : %lx, tid %lu\n",
			"reader", pthread_self(), (unsigned long)gettid());

	set_affinity();

	while (!test_go)
	{
	}

	for (;;) {
		pthread_rwlock_rdlock(&lock);
		assert(test_array.a == 8);
		if (unlikely(rduration))
			loop_sleep(rduration);
		pthread_rwlock_unlock(&lock);
		nr_reads++;
		if (unlikely(!test_duration_read()))
			break;
	}

	*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;

	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
			"writer", pthread_self(), (unsigned long)gettid());

	set_affinity();

	while (!test_go)
	{
	}
	smp_mb();

	for (;;) {
		pthread_rwlock_wrlock(&lock);
		test_array.a = 0;
		test_array.a = 8;
		pthread_rwlock_unlock(&lock);
		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(" [-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;
	}
	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 '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);
	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);
	}

	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 "
		"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(count_writer);
	return 0;
}
Commit	Line	Data
10c48e14 MD	1	/*
	2	* test_urcu.c
	3	*
	4	* Userspace RCU library - test program
	5	*
	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	21	*/
	22
9e97e478	23	#define _GNU_SOURCE
10c48e14 MD	24	#include <stdio.h>
	25	#include <pthread.h>
	26	#include <stdlib.h>
	27	#include <string.h>
	28	#include <sys/types.h>
	29	#include <sys/wait.h>
	30	#include <unistd.h>
	31	#include <stdio.h>
	32	#include <assert.h>
	33	#include <sys/syscall.h>
9e97e478	34	#include <sched.h>
10c48e14	35
ec4e58a3	36	#include <urcu/arch.h>
7685d963	37
55271c13 MD	38	/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
	39	#define CACHE_LINE_SIZE 4096
	40
2a7ac59d MD	41	/* hardcoded number of CPUs */
	42	#define NR_CPUS 16384
	43
10c48e14 MD	44	#if defined(_syscall0)
	45	_syscall0(pid_t, gettid)
	46	#elif defined(__NR_gettid)
	47	static inline pid_t gettid(void)
	48	{
	49	return syscall(__NR_gettid);
	50	}
	51	#else
	52	#warning "use pid as tid"
	53	static inline pid_t gettid(void)
	54	{
	55	return getpid();
	56	}
	57	#endif
	58
	59	#ifndef DYNAMIC_LINK_TEST
	60	#define _LGPL_SOURCE
	61	#else
	62	#define debug_yield_read()
	63	#endif
ec4e58a3	64	#include <urcu.h>
10c48e14 MD	65
	66	struct test_array {
	67	int a;
	68	};
	69
	70	pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
	71
78efb485	72	static volatile int test_go, test_stop;
10c48e14	73
9e31d0f0	74	static unsigned long wdelay;
10c48e14	75
2b4e4125	76	static volatile struct test_array test_array = { 8 };
10c48e14 MD	77
10c48e14 MD	78	static unsigned long duration;
10c48e14	79
daddf5b0	80	/* read-side C.S. duration, in loops */
8b632bab MD	81	static unsigned long rduration;
8b632bab MD	82
daddf5b0 MD	83	static inline void loop_sleep(unsigned long l)
	84	{
	85	while(l-- != 0)
	86	cpu_relax();
	87	}
	88
4bad7d45 MD	89	static int verbose_mode;
	90
	91	#define printf_verbose(fmt, args...) \
	92	do { \
	93	if (verbose_mode) \
	94	printf(fmt, args); \
	95	} while (0)
	96
2a7ac59d MD	97	static unsigned int cpu_affinities[NR_CPUS];
	98	static unsigned int next_aff = 0;
	99	static int use_affinity = 0;
	100
6af882ba MD	101	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	102
2a7ac59d MD	103	static void set_affinity(void)
	104	{
	105	cpu_set_t mask;
	106	int cpu;
6af882ba	107	int ret;
2a7ac59d MD	108
	109	if (!use_affinity)
	110	return;
	111
6af882ba MD	112	ret = pthread_mutex_lock(&affinity_mutex);
	113	if (ret) {
	114	perror("Error in pthread mutex lock");
	115	exit(-1);
	116	}
2a7ac59d	117	cpu = cpu_affinities[next_aff++];
6af882ba MD	118	ret = pthread_mutex_unlock(&affinity_mutex);
	119	if (ret) {
	120	perror("Error in pthread mutex unlock");
	121	exit(-1);
	122	}
2a7ac59d MD	123	CPU_ZERO(&mask);
	124	CPU_SET(cpu, &mask);
	125	sched_setaffinity(0, sizeof(mask), &mask);
	126	}
	127
10c48e14 MD	128	/*
	129	* returns 0 if test should end.
	130	*/
	131	static int test_duration_write(void)
	132	{
78efb485	133	return !test_stop;
10c48e14 MD	134	}
	135
	136	static int test_duration_read(void)
	137	{
78efb485	138	return !test_stop;
10c48e14 MD	139	}
	140
	141	static unsigned long long __thread nr_writes;
	142	static unsigned long long __thread nr_reads;
	143
	144	static unsigned int nr_readers;
	145	static unsigned int nr_writers;
	146
	147	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	148
	149	void rcu_copy_mutex_lock(void)
	150	{
	151	int ret;
	152	ret = pthread_mutex_lock(&rcu_copy_mutex);
	153	if (ret) {
	154	perror("Error in pthread mutex lock");
	155	exit(-1);
	156	}
	157	}
	158
	159	void rcu_copy_mutex_unlock(void)
	160	{
	161	int ret;
	162
	163	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	164	if (ret) {
	165	perror("Error in pthread mutex unlock");
	166	exit(-1);
	167	}
	168	}
	169
	170	void thr_reader(void _count)
	171	{
	172	unsigned long long *count = _count;
	173
4bad7d45	174	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
10c48e14 MD	175	"reader", pthread_self(), (unsigned long)gettid());
10c48e14 MD	176
2a7ac59d MD	177	set_affinity();
2a7ac59d MD	178
10c48e14 MD	179	while (!test_go)
	180	{
	181	}
	182
	183	for (;;) {
	184	pthread_rwlock_rdlock(&lock);
	185	assert(test_array.a == 8);
8b632bab	186	if (unlikely(rduration))
daddf5b0	187	loop_sleep(rduration);
10c48e14 MD	188	pthread_rwlock_unlock(&lock);
10c48e14 MD	189	nr_reads++;
59d5a406	190	if (unlikely(!test_duration_read()))
10c48e14 MD	191	break;
	192	}
	193
	194	*count = nr_reads;
4bad7d45	195	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
10c48e14 MD	196	"reader", pthread_self(), (unsigned long)gettid());
	197	return ((void*)1);
	198
	199	}
	200
	201	void thr_writer(void _count)
	202	{
	203	unsigned long long *count = _count;
	204
4bad7d45	205	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
10c48e14 MD	206	"writer", pthread_self(), (unsigned long)gettid());
10c48e14 MD	207
2a7ac59d MD	208	set_affinity();
2a7ac59d MD	209
10c48e14 MD	210	while (!test_go)
	211	{
	212	}
7685d963	213	smp_mb();
10c48e14 MD	214
	215	for (;;) {
	216	pthread_rwlock_wrlock(&lock);
2b4e4125	217	test_array.a = 0;
10c48e14 MD	218	test_array.a = 8;
	219	pthread_rwlock_unlock(&lock);
	220	nr_writes++;
59d5a406	221	if (unlikely(!test_duration_write()))
10c48e14	222	break;
59d5a406	223	if (unlikely(wdelay))
9e31d0f0	224	loop_sleep(wdelay);
10c48e14 MD	225	}
10c48e14 MD	226
4bad7d45	227	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
10c48e14 MD	228	"writer", pthread_self(), (unsigned long)gettid());
	229	*count = nr_writes;
	230	return ((void*)2);
	231	}
	232
	233	void show_usage(int argc, char **argv)
	234	{
	235	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	236	#ifdef DEBUG_YIELD
	237	printf(" [-r] [-w] (yield reader and/or writer)");
	238	#endif
7685d963	239	printf(" [-d delay] (writer period (us))");
daddf5b0	240	printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45	241	printf(" [-v] (verbose output)");
9e97e478	242	printf(" [-a cpu#] [-a cpu#]... (affinity)");
10c48e14 MD	243	printf("\n");
	244	}
	245
	246	int main(int argc, char **argv)
	247	{
	248	int err;
	249	pthread_t tid_reader, tid_writer;
	250	void *tret;
	251	unsigned long long count_reader, count_writer;
	252	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	253	int i, a;
10c48e14 MD	254
	255	if (argc < 4) {
	256	show_usage(argc, argv);
	257	return -1;
	258	}
7685d963	259	smp_mb();
10c48e14 MD	260
	261	err = sscanf(argv[1], "%u", &nr_readers);
	262	if (err != 1) {
	263	show_usage(argc, argv);
	264	return -1;
	265	}
	266
	267	err = sscanf(argv[2], "%u", &nr_writers);
	268	if (err != 1) {
	269	show_usage(argc, argv);
	270	return -1;
	271	}
	272
	273	err = sscanf(argv[3], "%lu", &duration);
	274	if (err != 1) {
	275	show_usage(argc, argv);
	276	return -1;
	277	}
	278
	279	for (i = 4; i < argc; i++) {
	280	if (argv[i][0] != '-')
	281	continue;
	282	switch (argv[i][1]) {
	283	#ifdef DEBUG_YIELD
	284	case 'r':
	285	yield_active \|= YIELD_READ;
	286	break;
	287	case 'w':
	288	yield_active \|= YIELD_WRITE;
	289	break;
	290	#endif
9e97e478 MD	291	case 'a':
	292	if (argc < i + 2) {
	293	show_usage(argc, argv);
	294	return -1;
	295	}
	296	a = atoi(argv[++i]);
2a7ac59d	297	cpu_affinities[next_aff++] = a;
9e97e478	298	use_affinity = 1;
4bad7d45	299	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	300	break;
8b632bab MD	301	case 'c':
	302	if (argc < i + 2) {
	303	show_usage(argc, argv);
	304	return -1;
	305	}
9e31d0f0	306	rduration = atol(argv[++i]);
8b632bab	307	break;
10c48e14 MD	308	case 'd':
	309	if (argc < i + 2) {
	310	show_usage(argc, argv);
	311	return -1;
	312	}
9e31d0f0	313	wdelay = atol(argv[++i]);
10c48e14	314	break;
4bad7d45 MD	315	case 'v':
	316	verbose_mode = 1;
	317	break;
10c48e14 MD	318	}
	319	}
	320
4bad7d45	321	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14	322	duration, nr_readers, nr_writers);
9e31d0f0	323	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	324	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	325	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
10c48e14 MD	326	"main", pthread_self(), (unsigned long)gettid());
	327
	328	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	329	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	330	count_reader = malloc(sizeof(count_reader) nr_readers);
	331	count_writer = malloc(sizeof(count_writer) nr_writers);
	332
2a7ac59d MD	333	next_aff = 0;
2a7ac59d MD	334
10c48e14 MD	335	for (i = 0; i < nr_readers; i++) {
	336	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	337	&count_reader[i]);
	338	if (err != 0)
	339	exit(1);
	340	}
	341	for (i = 0; i < nr_writers; i++) {
	342	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	343	&count_writer[i]);
	344	if (err != 0)
	345	exit(1);
	346	}
	347
7685d963	348	smp_mb();
10c48e14	349
78efb485 MD	350	test_go = 1;
	351
	352	sleep(duration);
	353
	354	test_stop = 1;
	355
10c48e14 MD	356	for (i = 0; i < nr_readers; i++) {
	357	err = pthread_join(tid_reader[i], &tret);
	358	if (err != 0)
	359	exit(1);
	360	tot_reads += count_reader[i];
	361	}
	362	for (i = 0; i < nr_writers; i++) {
	363	err = pthread_join(tid_writer[i], &tret);
	364	if (err != 0)
	365	exit(1);
	366	tot_writes += count_writer[i];
	367	}
4bad7d45 MD	368
4bad7d45 MD	369	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14	370	tot_writes);
6a190115	371	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d	372	"nr_writers %3u "
9e31d0f0	373	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
4bad7d45 MD	374	argv[0], duration, nr_readers, rduration,
	375	nr_writers, wdelay, tot_reads, tot_writes,
	376	tot_reads + tot_writes);
	377
10c48e14 MD	378	free(tid_reader);
	379	free(tid_writer);
	380	free(count_reader);
	381	free(count_writer);
	382	return 0;
	383	}