[urcu.git] / test_perthreadlock.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 "arch.h"

#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;
};

struct per_thread_lock {
	pthread_mutex_t lock;
} __attribute__((aligned(128)));	/* cache-line aligned */

static struct per_thread_lock *per_thread_lock;

static volatile int test_go, test_stop;

static int 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)

/*
 * 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(128))) *tot_nr_writes;
static unsigned long long __attribute__((aligned(128))) *tot_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 *data)
{
	unsigned long tidx = (unsigned long)data;

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

	while (!test_go)
	{
	}

	for (;;) {
		pthread_mutex_lock(&per_thread_lock[tidx].lock);
		assert(test_array.a == 8);
		if (unlikely(rduration))
			loop_sleep(rduration);
		pthread_mutex_unlock(&per_thread_lock[tidx].lock);
		nr_reads++;
		if (unlikely(!test_duration_read()))
			break;
	}

	tot_nr_reads[tidx] = 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;
	long tidx;

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

	while (!test_go)
	{
	}
	smp_mb();

	for (;;) {
		for (tidx = 0; tidx < nr_readers; tidx++) {
			pthread_mutex_lock(&per_thread_lock[tidx].lock);
		}
		test_array.a = 0;
		test_array.a = 8;
		for (tidx = nr_readers - 1; tidx >= 0; tidx--) {
			pthread_mutex_unlock(&per_thread_lock[tidx].lock);
		}
		nr_writes++;
		if (unlikely(!test_duration_write()))
			break;
		if (unlikely(wdelay))
			usleep(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(" [-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");
}

cpu_set_t affinity;

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;
	int use_affinity = 0;

	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;
	}

	CPU_ZERO(&affinity);

	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_SET(a, &affinity);
			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 = atoi(argv[++i]);
			break;
		case 'd':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			wdelay = atoi(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 : %u us.\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());

	if (use_affinity
	    && sched_setaffinity(0, sizeof(affinity), &affinity) < 0) {
		perror("sched_setaffinity");
		exit(-1);
	}

	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);
	tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
	tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
	per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers);

	for (i = 0; i < nr_readers; i++) {
		err = pthread_create(&tid_reader[i], NULL, thr_reader,
				     (void *)(long)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 += tot_nr_reads[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 %-15s testdur %4lu nr_readers %3u rdur %6lu "
		"nr_writers %3u "
		"wdelay %4u 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);
	free(tot_nr_reads);
	free(tot_nr_writes);
	free(per_thread_lock);
	return 0;
}
Commit	Line	Data
0ee8bb0a 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
0ee8bb0a 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>
0ee8bb0a MD	35
	36	#include "arch.h"
	37
	38	#if defined(_syscall0)
	39	_syscall0(pid_t, gettid)
	40	#elif defined(__NR_gettid)
	41	static inline pid_t gettid(void)
	42	{
	43	return syscall(__NR_gettid);
	44	}
	45	#else
	46	#warning "use pid as tid"
	47	static inline pid_t gettid(void)
	48	{
	49	return getpid();
	50	}
	51	#endif
	52
	53	#ifndef DYNAMIC_LINK_TEST
	54	#define _LGPL_SOURCE
	55	#else
	56	#define debug_yield_read()
	57	#endif
	58	#include "urcu.h"
	59
	60	struct test_array {
	61	int a;
	62	};
	63
	64	struct per_thread_lock {
	65	pthread_mutex_t lock;
	66	} __attribute__((aligned(128))); /* cache-line aligned */
	67
	68	static struct per_thread_lock *per_thread_lock;
	69
78efb485	70	static volatile int test_go, test_stop;
0ee8bb0a MD	71
	72	static int wdelay;
	73
2b4e4125	74	static volatile struct test_array test_array = { 8 };
0ee8bb0a MD	75
0ee8bb0a MD	76	static unsigned long duration;
0ee8bb0a	77
daddf5b0	78	/* read-side C.S. duration, in loops */
8b632bab MD	79	static unsigned long rduration;
8b632bab MD	80
daddf5b0 MD	81	static inline void loop_sleep(unsigned long l)
	82	{
	83	while(l-- != 0)
	84	cpu_relax();
	85	}
	86
4bad7d45 MD	87	static int verbose_mode;
	88
	89	#define printf_verbose(fmt, args...) \
	90	do { \
	91	if (verbose_mode) \
	92	printf(fmt, args); \
	93	} while (0)
	94
0ee8bb0a MD	95	/*
	96	* returns 0 if test should end.
	97	*/
	98	static int test_duration_write(void)
	99	{
78efb485	100	return !test_stop;
0ee8bb0a MD	101	}
	102
	103	static int test_duration_read(void)
	104	{
78efb485	105	return !test_stop;
0ee8bb0a MD	106	}
	107
	108	static unsigned long long __thread nr_writes;
	109	static unsigned long long __thread nr_reads;
	110
	111	static unsigned long long __attribute__((aligned(128))) *tot_nr_writes;
	112	static unsigned long long __attribute__((aligned(128))) *tot_nr_reads;
	113
	114	static unsigned int nr_readers;
	115	static unsigned int nr_writers;
	116
	117	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	118
	119	void rcu_copy_mutex_lock(void)
	120	{
	121	int ret;
	122	ret = pthread_mutex_lock(&rcu_copy_mutex);
	123	if (ret) {
	124	perror("Error in pthread mutex lock");
	125	exit(-1);
	126	}
	127	}
	128
	129	void rcu_copy_mutex_unlock(void)
	130	{
	131	int ret;
	132
	133	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	134	if (ret) {
	135	perror("Error in pthread mutex unlock");
	136	exit(-1);
	137	}
	138	}
	139
	140	void thr_reader(void data)
	141	{
	142	unsigned long tidx = (unsigned long)data;
	143
4bad7d45	144	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	145	"reader", pthread_self(), (unsigned long)gettid());
	146
	147	while (!test_go)
	148	{
	149	}
	150
	151	for (;;) {
	152	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	153	assert(test_array.a == 8);
8b632bab	154	if (unlikely(rduration))
daddf5b0	155	loop_sleep(rduration);
0ee8bb0a MD	156	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
0ee8bb0a MD	157	nr_reads++;
59d5a406	158	if (unlikely(!test_duration_read()))
0ee8bb0a MD	159	break;
	160	}
	161
	162	tot_nr_reads[tidx] = nr_reads;
cda3c71d	163	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	164	"reader", pthread_self(), (unsigned long)gettid());
	165	return ((void*)1);
	166
	167	}
	168
	169	void thr_writer(void data)
	170	{
	171	unsigned long wtidx = (unsigned long)data;
	172	long tidx;
	173
4bad7d45	174	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	175	"writer", pthread_self(), (unsigned long)gettid());
	176
	177	while (!test_go)
	178	{
	179	}
	180	smp_mb();
	181
	182	for (;;) {
	183	for (tidx = 0; tidx < nr_readers; tidx++) {
	184	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	185	}
2b4e4125	186	test_array.a = 0;
0ee8bb0a MD	187	test_array.a = 8;
	188	for (tidx = nr_readers - 1; tidx >= 0; tidx--) {
	189	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
	190	}
	191	nr_writes++;
59d5a406	192	if (unlikely(!test_duration_write()))
0ee8bb0a	193	break;
59d5a406	194	if (unlikely(wdelay))
0ee8bb0a MD	195	usleep(wdelay);
	196	}
	197
4bad7d45	198	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	199	"writer", pthread_self(), (unsigned long)gettid());
	200	tot_nr_writes[wtidx] = nr_writes;
	201	return ((void*)2);
	202	}
	203
	204	void show_usage(int argc, char **argv)
	205	{
	206	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	207	#ifdef DEBUG_YIELD
	208	printf(" [-r] [-w] (yield reader and/or writer)");
	209	#endif
	210	printf(" [-d delay] (writer period (us))");
daddf5b0	211	printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45	212	printf(" [-v] (verbose output)");
9e97e478	213	printf(" [-a cpu#] [-a cpu#]... (affinity)");
0ee8bb0a MD	214	printf("\n");
	215	}
	216
9e97e478 MD	217	cpu_set_t affinity;
9e97e478 MD	218
0ee8bb0a MD	219	int main(int argc, char **argv)
	220	{
	221	int err;
	222	pthread_t tid_reader, tid_writer;
	223	void *tret;
	224	unsigned long long count_reader, count_writer;
	225	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 MD	226	int i, a;
9e97e478 MD	227	int use_affinity = 0;
0ee8bb0a MD	228
	229	if (argc < 4) {
	230	show_usage(argc, argv);
	231	return -1;
	232	}
	233	smp_mb();
	234
	235	err = sscanf(argv[1], "%u", &nr_readers);
	236	if (err != 1) {
	237	show_usage(argc, argv);
	238	return -1;
	239	}
	240
	241	err = sscanf(argv[2], "%u", &nr_writers);
	242	if (err != 1) {
	243	show_usage(argc, argv);
	244	return -1;
	245	}
	246
	247	err = sscanf(argv[3], "%lu", &duration);
	248	if (err != 1) {
	249	show_usage(argc, argv);
	250	return -1;
	251	}
	252
9e97e478 MD	253	CPU_ZERO(&affinity);
9e97e478 MD	254
0ee8bb0a MD	255	for (i = 4; i < argc; i++) {
	256	if (argv[i][0] != '-')
	257	continue;
	258	switch (argv[i][1]) {
	259	#ifdef DEBUG_YIELD
	260	case 'r':
	261	yield_active \|= YIELD_READ;
	262	break;
	263	case 'w':
	264	yield_active \|= YIELD_WRITE;
	265	break;
	266	#endif
9e97e478 MD	267	case 'a':
	268	if (argc < i + 2) {
	269	show_usage(argc, argv);
	270	return -1;
	271	}
	272	a = atoi(argv[++i]);
	273	CPU_SET(a, &affinity);
	274	use_affinity = 1;
4bad7d45	275	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	276	break;
8b632bab MD	277	case 'c':
	278	if (argc < i + 2) {
	279	show_usage(argc, argv);
	280	return -1;
	281	}
	282	rduration = atoi(argv[++i]);
	283	break;
0ee8bb0a MD	284	case 'd':
	285	if (argc < i + 2) {
	286	show_usage(argc, argv);
	287	return -1;
	288	}
	289	wdelay = atoi(argv[++i]);
	290	break;
4bad7d45 MD	291	case 'v':
	292	verbose_mode = 1;
	293	break;
0ee8bb0a MD	294	}
	295	}
	296
4bad7d45	297	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a	298	duration, nr_readers, nr_writers);
4bad7d45 MD	299	printf_verbose("Writer delay : %u us.\n", wdelay);
	300	printf_verbose("Reader duration : %lu loops.\n", rduration);
	301	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	302	"main", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	303
9e97e478 MD	304	if (use_affinity
	305	&& sched_setaffinity(0, sizeof(affinity), &affinity) < 0) {
	306	perror("sched_setaffinity");
	307	exit(-1);
	308	}
	309
0ee8bb0a MD	310	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	311	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	312	count_reader = malloc(sizeof(count_reader) nr_readers);
	313	count_writer = malloc(sizeof(count_writer) nr_writers);
	314	tot_nr_reads = malloc(sizeof(tot_nr_reads) nr_readers);
	315	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	316	per_thread_lock = malloc(sizeof(per_thread_lock) nr_readers);
	317
	318	for (i = 0; i < nr_readers; i++) {
	319	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	320	(void *)(long)i);
	321	if (err != 0)
	322	exit(1);
	323	}
	324	for (i = 0; i < nr_writers; i++) {
	325	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	326	(void *)(long)i);
	327	if (err != 0)
	328	exit(1);
	329	}
	330
0ee8bb0a MD	331	smp_mb();
0ee8bb0a MD	332
78efb485 MD	333	test_go = 1;
	334
	335	sleep(duration);
	336
	337	test_stop = 1;
	338
0ee8bb0a MD	339	for (i = 0; i < nr_readers; i++) {
	340	err = pthread_join(tid_reader[i], &tret);
	341	if (err != 0)
	342	exit(1);
	343	tot_reads += tot_nr_reads[i];
	344	}
	345	for (i = 0; i < nr_writers; i++) {
	346	err = pthread_join(tid_writer[i], &tret);
	347	if (err != 0)
	348	exit(1);
	349	tot_writes += tot_nr_writes[i];
	350	}
4bad7d45 MD	351
4bad7d45 MD	352	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a	353	tot_writes);
cda3c71d MD	354	printf("SUMMARY %-15s testdur %4lu nr_readers %3u rdur %6lu "
	355	"nr_writers %3u "
	356	"wdelay %4u nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
4bad7d45 MD	357	argv[0], duration, nr_readers, rduration,
	358	nr_writers, wdelay, tot_reads, tot_writes,
	359	tot_reads + tot_writes);
	360
0ee8bb0a MD	361	free(tid_reader);
	362	free(tid_writer);
	363	free(count_reader);
	364	free(count_writer);
	365	free(tot_nr_reads);
	366	free(tot_nr_writes);
	367	free(per_thread_lock);
	368	return 0;
	369	}