[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"

/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
#define CACHE_LINE_SIZE 4096

#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(CACHE_LINE_SIZE)));	/* cache-line aligned */

static struct per_thread_lock *per_thread_lock;

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)

/*
 * 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 long long __attribute__((aligned(CACHE_LINE_SIZE))) *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 = (long)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))
			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(" [-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 = 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());

	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 %-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);
	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
55271c13 MD	38	/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
	39	#define CACHE_LINE_SIZE 4096
	40
0ee8bb0a MD	41	#if defined(_syscall0)
	42	_syscall0(pid_t, gettid)
	43	#elif defined(__NR_gettid)
	44	static inline pid_t gettid(void)
	45	{
	46	return syscall(__NR_gettid);
	47	}
	48	#else
	49	#warning "use pid as tid"
	50	static inline pid_t gettid(void)
	51	{
	52	return getpid();
	53	}
	54	#endif
	55
	56	#ifndef DYNAMIC_LINK_TEST
	57	#define _LGPL_SOURCE
	58	#else
	59	#define debug_yield_read()
	60	#endif
	61	#include "urcu.h"
	62
	63	struct test_array {
	64	int a;
	65	};
	66
	67	struct per_thread_lock {
	68	pthread_mutex_t lock;
55271c13	69	} __attribute__((aligned(CACHE_LINE_SIZE))); /* cache-line aligned */
0ee8bb0a MD	70
	71	static struct per_thread_lock *per_thread_lock;
	72
78efb485	73	static volatile int test_go, test_stop;
0ee8bb0a	74
9e31d0f0	75	static unsigned long wdelay;
0ee8bb0a	76
2b4e4125	77	static volatile struct test_array test_array = { 8 };
0ee8bb0a MD	78
0ee8bb0a MD	79	static unsigned long duration;
0ee8bb0a	80
daddf5b0	81	/* read-side C.S. duration, in loops */
8b632bab MD	82	static unsigned long rduration;
8b632bab MD	83
daddf5b0 MD	84	static inline void loop_sleep(unsigned long l)
	85	{
	86	while(l-- != 0)
	87	cpu_relax();
	88	}
	89
4bad7d45 MD	90	static int verbose_mode;
	91
	92	#define printf_verbose(fmt, args...) \
	93	do { \
	94	if (verbose_mode) \
	95	printf(fmt, args); \
	96	} while (0)
	97
0ee8bb0a MD	98	/*
	99	* returns 0 if test should end.
	100	*/
	101	static int test_duration_write(void)
	102	{
78efb485	103	return !test_stop;
0ee8bb0a MD	104	}
	105
	106	static int test_duration_read(void)
	107	{
78efb485	108	return !test_stop;
0ee8bb0a MD	109	}
	110
	111	static unsigned long long __thread nr_writes;
	112	static unsigned long long __thread nr_reads;
	113
55271c13 MD	114	static
	115	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
	116	static
	117	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_reads;
0ee8bb0a MD	118
	119	static unsigned int nr_readers;
	120	static unsigned int nr_writers;
	121
	122	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	123
	124	void rcu_copy_mutex_lock(void)
	125	{
	126	int ret;
	127	ret = pthread_mutex_lock(&rcu_copy_mutex);
	128	if (ret) {
	129	perror("Error in pthread mutex lock");
	130	exit(-1);
	131	}
	132	}
	133
	134	void rcu_copy_mutex_unlock(void)
	135	{
	136	int ret;
	137
	138	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	139	if (ret) {
	140	perror("Error in pthread mutex unlock");
	141	exit(-1);
	142	}
	143	}
	144
	145	void thr_reader(void data)
	146	{
	147	unsigned long tidx = (unsigned long)data;
	148
4bad7d45	149	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	150	"reader", pthread_self(), (unsigned long)gettid());
	151
	152	while (!test_go)
	153	{
	154	}
	155
	156	for (;;) {
	157	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	158	assert(test_array.a == 8);
8b632bab	159	if (unlikely(rduration))
daddf5b0	160	loop_sleep(rduration);
0ee8bb0a MD	161	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
0ee8bb0a MD	162	nr_reads++;
59d5a406	163	if (unlikely(!test_duration_read()))
0ee8bb0a MD	164	break;
	165	}
	166
	167	tot_nr_reads[tidx] = nr_reads;
cda3c71d	168	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	169	"reader", pthread_self(), (unsigned long)gettid());
	170	return ((void*)1);
	171
	172	}
	173
	174	void thr_writer(void data)
	175	{
	176	unsigned long wtidx = (unsigned long)data;
	177	long tidx;
	178
4bad7d45	179	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	180	"writer", pthread_self(), (unsigned long)gettid());
	181
	182	while (!test_go)
	183	{
	184	}
	185	smp_mb();
	186
	187	for (;;) {
	188	for (tidx = 0; tidx < nr_readers; tidx++) {
	189	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	190	}
2b4e4125	191	test_array.a = 0;
0ee8bb0a	192	test_array.a = 8;
f120cc10	193	for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
0ee8bb0a MD	194	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
	195	}
	196	nr_writes++;
59d5a406	197	if (unlikely(!test_duration_write()))
0ee8bb0a	198	break;
59d5a406	199	if (unlikely(wdelay))
9e31d0f0	200	loop_sleep(wdelay);
0ee8bb0a MD	201	}
0ee8bb0a MD	202
4bad7d45	203	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	204	"writer", pthread_self(), (unsigned long)gettid());
	205	tot_nr_writes[wtidx] = nr_writes;
	206	return ((void*)2);
	207	}
	208
	209	void show_usage(int argc, char **argv)
	210	{
	211	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	212	#ifdef DEBUG_YIELD
	213	printf(" [-r] [-w] (yield reader and/or writer)");
	214	#endif
	215	printf(" [-d delay] (writer period (us))");
daddf5b0	216	printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45	217	printf(" [-v] (verbose output)");
9e97e478	218	printf(" [-a cpu#] [-a cpu#]... (affinity)");
0ee8bb0a MD	219	printf("\n");
	220	}
	221
9e97e478 MD	222	cpu_set_t affinity;
9e97e478 MD	223
0ee8bb0a MD	224	int main(int argc, char **argv)
	225	{
	226	int err;
	227	pthread_t tid_reader, tid_writer;
	228	void *tret;
	229	unsigned long long count_reader, count_writer;
	230	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 MD	231	int i, a;
9e97e478 MD	232	int use_affinity = 0;
0ee8bb0a MD	233
	234	if (argc < 4) {
	235	show_usage(argc, argv);
	236	return -1;
	237	}
	238	smp_mb();
	239
	240	err = sscanf(argv[1], "%u", &nr_readers);
	241	if (err != 1) {
	242	show_usage(argc, argv);
	243	return -1;
	244	}
	245
	246	err = sscanf(argv[2], "%u", &nr_writers);
	247	if (err != 1) {
	248	show_usage(argc, argv);
	249	return -1;
	250	}
	251
	252	err = sscanf(argv[3], "%lu", &duration);
	253	if (err != 1) {
	254	show_usage(argc, argv);
	255	return -1;
	256	}
	257
9e97e478 MD	258	CPU_ZERO(&affinity);
9e97e478 MD	259
0ee8bb0a MD	260	for (i = 4; i < argc; i++) {
	261	if (argv[i][0] != '-')
	262	continue;
	263	switch (argv[i][1]) {
	264	#ifdef DEBUG_YIELD
	265	case 'r':
	266	yield_active \|= YIELD_READ;
	267	break;
	268	case 'w':
	269	yield_active \|= YIELD_WRITE;
	270	break;
	271	#endif
9e97e478 MD	272	case 'a':
	273	if (argc < i + 2) {
	274	show_usage(argc, argv);
	275	return -1;
	276	}
	277	a = atoi(argv[++i]);
	278	CPU_SET(a, &affinity);
	279	use_affinity = 1;
4bad7d45	280	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	281	break;
8b632bab MD	282	case 'c':
	283	if (argc < i + 2) {
	284	show_usage(argc, argv);
	285	return -1;
	286	}
9e31d0f0	287	rduration = atol(argv[++i]);
8b632bab	288	break;
0ee8bb0a MD	289	case 'd':
	290	if (argc < i + 2) {
	291	show_usage(argc, argv);
	292	return -1;
	293	}
9e31d0f0	294	wdelay = atol(argv[++i]);
0ee8bb0a	295	break;
4bad7d45 MD	296	case 'v':
	297	verbose_mode = 1;
	298	break;
0ee8bb0a MD	299	}
	300	}
	301
4bad7d45	302	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a	303	duration, nr_readers, nr_writers);
9e31d0f0	304	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	305	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	306	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	307	"main", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	308
9e97e478 MD	309	if (use_affinity
	310	&& sched_setaffinity(0, sizeof(affinity), &affinity) < 0) {
	311	perror("sched_setaffinity");
	312	exit(-1);
	313	}
	314
0ee8bb0a MD	315	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	316	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	317	count_reader = malloc(sizeof(count_reader) nr_readers);
	318	count_writer = malloc(sizeof(count_writer) nr_writers);
	319	tot_nr_reads = malloc(sizeof(tot_nr_reads) nr_readers);
	320	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	321	per_thread_lock = malloc(sizeof(per_thread_lock) nr_readers);
	322
	323	for (i = 0; i < nr_readers; i++) {
	324	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	325	(void *)(long)i);
	326	if (err != 0)
	327	exit(1);
	328	}
	329	for (i = 0; i < nr_writers; i++) {
	330	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	331	(void *)(long)i);
	332	if (err != 0)
	333	exit(1);
	334	}
	335
0ee8bb0a MD	336	smp_mb();
0ee8bb0a MD	337
78efb485 MD	338	test_go = 1;
	339
	340	sleep(duration);
	341
	342	test_stop = 1;
	343
0ee8bb0a MD	344	for (i = 0; i < nr_readers; i++) {
	345	err = pthread_join(tid_reader[i], &tret);
	346	if (err != 0)
	347	exit(1);
	348	tot_reads += tot_nr_reads[i];
	349	}
	350	for (i = 0; i < nr_writers; i++) {
	351	err = pthread_join(tid_writer[i], &tret);
	352	if (err != 0)
	353	exit(1);
	354	tot_writes += tot_nr_writes[i];
	355	}
4bad7d45 MD	356
4bad7d45 MD	357	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a	358	tot_writes);
6a190115	359	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d	360	"nr_writers %3u "
9e31d0f0	361	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
4bad7d45 MD	362	argv[0], duration, nr_readers, rduration,
	363	nr_writers, wdelay, tot_reads, tot_writes,
	364	tot_reads + tot_writes);
	365
0ee8bb0a MD	366	free(tid_reader);
	367	free(tid_writer);
	368	free(count_reader);
	369	free(count_writer);
	370	free(tot_nr_reads);
	371	free(tot_nr_writes);
	372	free(per_thread_lock);
	373	return 0;
	374	}