[urcu.git] / tests / test_perthreadlock.c

/*
 * 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>
#include <urcu/tls-compat.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.h>

struct test_array {
	int a;
};

struct per_thread_lock {
	pthread_mutex_t lock;
} __attribute__((aligned(CAA_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;

/* 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;

#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)
{
#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 long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
static
unsigned long long __attribute__((aligned(CAA_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", (unsigned long) pthread_self(),
			(unsigned long) gettid());

	set_affinity();

	while (!test_go)
	{
	}

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

	tot_nr_reads[tidx] = URCU_TLS(nr_reads);
	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"reader", (unsigned long) 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", (unsigned long) pthread_self(),
			(unsigned long) gettid());

	set_affinity();

	while (!test_go)
	{
	}
	cmm_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;
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
			pthread_mutex_unlock(&per_thread_lock[tidx].lock);
		}
		URCU_TLS(nr_writes)++;
		if (caa_unlikely(!test_duration_write()))
			break;
		if (caa_unlikely(wdelay))
			loop_sleep(wdelay);
	}

	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"writer", (unsigned long) pthread_self(),
			(unsigned long) gettid());
	tot_nr_writes[wtidx] = URCU_TLS(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 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, thread id : %lx, tid %lu\n",
			"main", (unsigned long) pthread_self(), (unsigned long) gettid());

	tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
	tid_writer = malloc(sizeof(*tid_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_mutex_init(&per_thread_lock[i].lock, NULL);
		if (err != 0)
			exit(1);
	}

	next_aff = 0;

	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);
	}

	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 += 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 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(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	*
6982d6d7	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
0ee8bb0a MD	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
d8540fc5	24	#include "../config.h"
0ee8bb0a MD	25	#include <stdio.h>
	26	#include <pthread.h>
	27	#include <stdlib.h>
	28	#include <string.h>
	29	#include <sys/types.h>
	30	#include <sys/wait.h>
	31	#include <unistd.h>
	32	#include <stdio.h>
	33	#include <assert.h>
9e97e478	34	#include <sched.h>
94b343fd	35	#include <errno.h>
0ee8bb0a	36
ec4e58a3	37	#include <urcu/arch.h>
bd252a04	38	#include <urcu/tls-compat.h>
0ee8bb0a	39
65fcc7e9 MD	40	#ifdef __linux__
	41	#include <syscall.h>
	42	#endif
	43
2a7ac59d MD	44	/* hardcoded number of CPUs */
	45	#define NR_CPUS 16384
	46
0ee8bb0a MD	47	#if defined(_syscall0)
	48	_syscall0(pid_t, gettid)
	49	#elif defined(__NR_gettid)
	50	static inline pid_t gettid(void)
	51	{
	52	return syscall(__NR_gettid);
	53	}
	54	#else
	55	#warning "use pid as tid"
	56	static inline pid_t gettid(void)
	57	{
	58	return getpid();
	59	}
	60	#endif
	61
	62	#ifndef DYNAMIC_LINK_TEST
	63	#define _LGPL_SOURCE
	64	#else
	65	#define debug_yield_read()
	66	#endif
ec4e58a3	67	#include <urcu.h>
0ee8bb0a MD	68
	69	struct test_array {
	70	int a;
	71	};
	72
	73	struct per_thread_lock {
	74	pthread_mutex_t lock;
06f22bdb	75	} __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
0ee8bb0a MD	76
	77	static struct per_thread_lock *per_thread_lock;
	78
78efb485	79	static volatile int test_go, test_stop;
0ee8bb0a	80
9e31d0f0	81	static unsigned long wdelay;
0ee8bb0a	82
2b4e4125	83	static volatile struct test_array test_array = { 8 };
0ee8bb0a MD	84
0ee8bb0a MD	85	static unsigned long duration;
0ee8bb0a	86
daddf5b0	87	/* read-side C.S. duration, in loops */
8b632bab MD	88	static unsigned long rduration;
8b632bab MD	89
31b598e0 MD	90	/* write-side C.S. duration, in loops */
	91	static unsigned long wduration;
	92
ab0aacbe	93	static inline void loop_sleep(unsigned long loops)
daddf5b0	94	{
ab0aacbe	95	while (loops-- != 0)
06f22bdb	96	caa_cpu_relax();
daddf5b0 MD	97	}
daddf5b0 MD	98
4bad7d45 MD	99	static int verbose_mode;
	100
	101	#define printf_verbose(fmt, args...) \
	102	do { \
	103	if (verbose_mode) \
	104	printf(fmt, args); \
	105	} while (0)
	106
2a7ac59d MD	107	static unsigned int cpu_affinities[NR_CPUS];
	108	static unsigned int next_aff = 0;
	109	static int use_affinity = 0;
	110
6af882ba MD	111	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	112
d8540fc5 PA	113	#ifndef HAVE_CPU_SET_T
	114	typedef unsigned long cpu_set_t;
	115	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	116	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	117	#endif
	118
2a7ac59d MD	119	static void set_affinity(void)
2a7ac59d MD	120	{
95bc7fb9	121	#if HAVE_SCHED_SETAFFINITY
2a7ac59d	122	cpu_set_t mask;
95bc7fb9 MD	123	int cpu, ret;
95bc7fb9 MD	124	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	125
	126	if (!use_affinity)
	127	return;
	128
d8540fc5	129	#if HAVE_SCHED_SETAFFINITY
6af882ba MD	130	ret = pthread_mutex_lock(&affinity_mutex);
	131	if (ret) {
	132	perror("Error in pthread mutex lock");
	133	exit(-1);
	134	}
2a7ac59d	135	cpu = cpu_affinities[next_aff++];
6af882ba MD	136	ret = pthread_mutex_unlock(&affinity_mutex);
	137	if (ret) {
	138	perror("Error in pthread mutex unlock");
	139	exit(-1);
	140	}
2a7ac59d MD	141	CPU_ZERO(&mask);
2a7ac59d MD	142	CPU_SET(cpu, &mask);
d8540fc5 PA	143	#if SCHED_SETAFFINITY_ARGS == 2
	144	sched_setaffinity(0, &mask);
	145	#else
2a7ac59d	146	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	147	#endif
d8540fc5 PA	148	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	149	}
2a7ac59d MD	150
0ee8bb0a MD	151	/*
	152	* returns 0 if test should end.
	153	*/
	154	static int test_duration_write(void)
	155	{
78efb485	156	return !test_stop;
0ee8bb0a MD	157	}
	158
	159	static int test_duration_read(void)
	160	{
78efb485	161	return !test_stop;
0ee8bb0a MD	162	}
0ee8bb0a MD	163
bd252a04 MD	164	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	165	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
0ee8bb0a	166
55271c13	167	static
06f22bdb	168	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13	169	static
06f22bdb	170	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;
0ee8bb0a MD	171
	172	static unsigned int nr_readers;
	173	static unsigned int nr_writers;
	174
	175	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	176
	177	void rcu_copy_mutex_lock(void)
	178	{
	179	int ret;
	180	ret = pthread_mutex_lock(&rcu_copy_mutex);
	181	if (ret) {
	182	perror("Error in pthread mutex lock");
	183	exit(-1);
	184	}
	185	}
	186
	187	void rcu_copy_mutex_unlock(void)
	188	{
	189	int ret;
	190
	191	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	192	if (ret) {
	193	perror("Error in pthread mutex unlock");
	194	exit(-1);
	195	}
	196	}
	197
	198	void thr_reader(void data)
	199	{
	200	unsigned long tidx = (unsigned long)data;
	201
4bad7d45	202	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	203	"reader", (unsigned long) pthread_self(),
6ff854ac MD	204	(unsigned long) gettid());
0ee8bb0a	205
2a7ac59d MD	206	set_affinity();
2a7ac59d MD	207
0ee8bb0a MD	208	while (!test_go)
	209	{
	210	}
	211
	212	for (;;) {
	213	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	214	assert(test_array.a == 8);
a0b7f7ea	215	if (caa_unlikely(rduration))
daddf5b0	216	loop_sleep(rduration);
0ee8bb0a	217	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
bd252a04	218	URCU_TLS(nr_reads)++;
a0b7f7ea	219	if (caa_unlikely(!test_duration_read()))
0ee8bb0a MD	220	break;
	221	}
	222
bd252a04	223	tot_nr_reads[tidx] = URCU_TLS(nr_reads);
cda3c71d	224	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
6ff854ac MD	225	"reader", (unsigned long) pthread_self(),
6ff854ac MD	226	(unsigned long) gettid());
0ee8bb0a MD	227	return ((void*)1);
	228
	229	}
	230
	231	void thr_writer(void data)
	232	{
	233	unsigned long wtidx = (unsigned long)data;
	234	long tidx;
	235
4bad7d45	236	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	237	"writer", (unsigned long) pthread_self(),
6ff854ac MD	238	(unsigned long) gettid());
0ee8bb0a	239
2a7ac59d MD	240	set_affinity();
2a7ac59d MD	241
0ee8bb0a MD	242	while (!test_go)
	243	{
	244	}
5481ddb3	245	cmm_smp_mb();
0ee8bb0a MD	246
	247	for (;;) {
	248	for (tidx = 0; tidx < nr_readers; tidx++) {
	249	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	250	}
2b4e4125	251	test_array.a = 0;
0ee8bb0a	252	test_array.a = 8;
a0b7f7ea	253	if (caa_unlikely(wduration))
31b598e0	254	loop_sleep(wduration);
f120cc10	255	for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
0ee8bb0a MD	256	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
0ee8bb0a MD	257	}
bd252a04	258	URCU_TLS(nr_writes)++;
a0b7f7ea	259	if (caa_unlikely(!test_duration_write()))
0ee8bb0a	260	break;
a0b7f7ea	261	if (caa_unlikely(wdelay))
9e31d0f0	262	loop_sleep(wdelay);
0ee8bb0a MD	263	}
0ee8bb0a MD	264
4bad7d45	265	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
6ff854ac MD	266	"writer", (unsigned long) pthread_self(),
6ff854ac MD	267	(unsigned long) gettid());
bd252a04	268	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
0ee8bb0a MD	269	return ((void*)2);
	270	}
	271
	272	void show_usage(int argc, char **argv)
	273	{
	274	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	275	#ifdef DEBUG_YIELD
	276	printf(" [-r] [-w] (yield reader and/or writer)");
	277	#endif
	278	printf(" [-d delay] (writer period (us))");
daddf5b0	279	printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0	280	printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45	281	printf(" [-v] (verbose output)");
9e97e478	282	printf(" [-a cpu#] [-a cpu#]... (affinity)");
0ee8bb0a MD	283	printf("\n");
	284	}
	285
	286	int main(int argc, char **argv)
	287	{
	288	int err;
	289	pthread_t tid_reader, tid_writer;
	290	void *tret;
0ee8bb0a	291	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	292	int i, a;
0ee8bb0a MD	293
	294	if (argc < 4) {
	295	show_usage(argc, argv);
	296	return -1;
	297	}
5481ddb3	298	cmm_smp_mb();
0ee8bb0a MD	299
	300	err = sscanf(argv[1], "%u", &nr_readers);
	301	if (err != 1) {
	302	show_usage(argc, argv);
	303	return -1;
	304	}
	305
	306	err = sscanf(argv[2], "%u", &nr_writers);
	307	if (err != 1) {
	308	show_usage(argc, argv);
	309	return -1;
	310	}
	311
	312	err = sscanf(argv[3], "%lu", &duration);
	313	if (err != 1) {
	314	show_usage(argc, argv);
	315	return -1;
	316	}
	317
	318	for (i = 4; i < argc; i++) {
	319	if (argv[i][0] != '-')
	320	continue;
	321	switch (argv[i][1]) {
	322	#ifdef DEBUG_YIELD
	323	case 'r':
	324	yield_active \|= YIELD_READ;
	325	break;
	326	case 'w':
	327	yield_active \|= YIELD_WRITE;
	328	break;
	329	#endif
9e97e478 MD	330	case 'a':
	331	if (argc < i + 2) {
	332	show_usage(argc, argv);
	333	return -1;
	334	}
	335	a = atoi(argv[++i]);
2a7ac59d	336	cpu_affinities[next_aff++] = a;
9e97e478	337	use_affinity = 1;
4bad7d45	338	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	339	break;
8b632bab MD	340	case 'c':
	341	if (argc < i + 2) {
	342	show_usage(argc, argv);
	343	return -1;
	344	}
9e31d0f0	345	rduration = atol(argv[++i]);
8b632bab	346	break;
0ee8bb0a MD	347	case 'd':
	348	if (argc < i + 2) {
	349	show_usage(argc, argv);
	350	return -1;
	351	}
9e31d0f0	352	wdelay = atol(argv[++i]);
0ee8bb0a	353	break;
31b598e0 MD	354	case 'e':
	355	if (argc < i + 2) {
	356	show_usage(argc, argv);
	357	return -1;
	358	}
	359	wduration = atol(argv[++i]);
	360	break;
4bad7d45 MD	361	case 'v':
	362	verbose_mode = 1;
	363	break;
0ee8bb0a MD	364	}
	365	}
	366
4bad7d45	367	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a	368	duration, nr_readers, nr_writers);
9e31d0f0	369	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	370	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	371	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
6ff854ac	372	"main", (unsigned long) pthread_self(), (unsigned long) gettid());
0ee8bb0a MD	373
	374	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	375	tid_writer = malloc(sizeof(tid_writer) nr_writers);
0ee8bb0a MD	376	tot_nr_reads = malloc(sizeof(tot_nr_reads) nr_readers);
	377	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	378	per_thread_lock = malloc(sizeof(per_thread_lock) nr_readers);
dee09338 MD	379	for (i = 0; i < nr_readers; i++) {
	380	err = pthread_mutex_init(&per_thread_lock[i].lock, NULL);
	381	if (err != 0)
	382	exit(1);
	383	}
0ee8bb0a	384
2a7ac59d MD	385	next_aff = 0;
2a7ac59d MD	386
0ee8bb0a MD	387	for (i = 0; i < nr_readers; i++) {
	388	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	389	(void *)(long)i);
	390	if (err != 0)
	391	exit(1);
	392	}
	393	for (i = 0; i < nr_writers; i++) {
	394	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	395	(void *)(long)i);
	396	if (err != 0)
	397	exit(1);
	398	}
	399
5481ddb3	400	cmm_smp_mb();
0ee8bb0a	401
78efb485 MD	402	test_go = 1;
	403
	404	sleep(duration);
	405
	406	test_stop = 1;
	407
0ee8bb0a MD	408	for (i = 0; i < nr_readers; i++) {
	409	err = pthread_join(tid_reader[i], &tret);
	410	if (err != 0)
	411	exit(1);
	412	tot_reads += tot_nr_reads[i];
	413	}
	414	for (i = 0; i < nr_writers; i++) {
	415	err = pthread_join(tid_writer[i], &tret);
	416	if (err != 0)
	417	exit(1);
	418	tot_writes += tot_nr_writes[i];
	419	}
4bad7d45 MD	420
4bad7d45 MD	421	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a	422	tot_writes);
a50a7b43	423	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	424	"nr_writers %3u "
9e31d0f0	425	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	426	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	427	nr_writers, wdelay, tot_reads, tot_writes,
	428	tot_reads + tot_writes);
	429
0ee8bb0a MD	430	free(tid_reader);
0ee8bb0a MD	431	free(tid_writer);
0ee8bb0a MD	432	free(tot_nr_reads);
	433	free(tot_nr_writes);
	434	free(per_thread_lock);
	435	return 0;
	436	}