[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", 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", 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());

	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", 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", 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",
0ee8bb0a MD	203	"reader", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	204
2a7ac59d MD	205	set_affinity();
2a7ac59d MD	206
0ee8bb0a MD	207	while (!test_go)
	208	{
	209	}
	210
	211	for (;;) {
	212	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	213	assert(test_array.a == 8);
a0b7f7ea	214	if (caa_unlikely(rduration))
daddf5b0	215	loop_sleep(rduration);
0ee8bb0a	216	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
bd252a04	217	URCU_TLS(nr_reads)++;
a0b7f7ea	218	if (caa_unlikely(!test_duration_read()))
0ee8bb0a MD	219	break;
	220	}
	221
bd252a04	222	tot_nr_reads[tidx] = URCU_TLS(nr_reads);
cda3c71d	223	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	224	"reader", pthread_self(), (unsigned long)gettid());
	225	return ((void*)1);
	226
	227	}
	228
	229	void thr_writer(void data)
	230	{
	231	unsigned long wtidx = (unsigned long)data;
	232	long tidx;
	233
4bad7d45	234	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	235	"writer", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	236
2a7ac59d MD	237	set_affinity();
2a7ac59d MD	238
0ee8bb0a MD	239	while (!test_go)
	240	{
	241	}
5481ddb3	242	cmm_smp_mb();
0ee8bb0a MD	243
	244	for (;;) {
	245	for (tidx = 0; tidx < nr_readers; tidx++) {
	246	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	247	}
2b4e4125	248	test_array.a = 0;
0ee8bb0a	249	test_array.a = 8;
a0b7f7ea	250	if (caa_unlikely(wduration))
31b598e0	251	loop_sleep(wduration);
f120cc10	252	for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
0ee8bb0a MD	253	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
0ee8bb0a MD	254	}
bd252a04	255	URCU_TLS(nr_writes)++;
a0b7f7ea	256	if (caa_unlikely(!test_duration_write()))
0ee8bb0a	257	break;
a0b7f7ea	258	if (caa_unlikely(wdelay))
9e31d0f0	259	loop_sleep(wdelay);
0ee8bb0a MD	260	}
0ee8bb0a MD	261
4bad7d45	262	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a	263	"writer", pthread_self(), (unsigned long)gettid());
bd252a04	264	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
0ee8bb0a MD	265	return ((void*)2);
	266	}
	267
	268	void show_usage(int argc, char **argv)
	269	{
	270	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	271	#ifdef DEBUG_YIELD
	272	printf(" [-r] [-w] (yield reader and/or writer)");
	273	#endif
	274	printf(" [-d delay] (writer period (us))");
daddf5b0	275	printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0	276	printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45	277	printf(" [-v] (verbose output)");
9e97e478	278	printf(" [-a cpu#] [-a cpu#]... (affinity)");
0ee8bb0a MD	279	printf("\n");
	280	}
	281
	282	int main(int argc, char **argv)
	283	{
	284	int err;
	285	pthread_t tid_reader, tid_writer;
	286	void *tret;
0ee8bb0a	287	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	288	int i, a;
0ee8bb0a MD	289
	290	if (argc < 4) {
	291	show_usage(argc, argv);
	292	return -1;
	293	}
5481ddb3	294	cmm_smp_mb();
0ee8bb0a MD	295
	296	err = sscanf(argv[1], "%u", &nr_readers);
	297	if (err != 1) {
	298	show_usage(argc, argv);
	299	return -1;
	300	}
	301
	302	err = sscanf(argv[2], "%u", &nr_writers);
	303	if (err != 1) {
	304	show_usage(argc, argv);
	305	return -1;
	306	}
	307
	308	err = sscanf(argv[3], "%lu", &duration);
	309	if (err != 1) {
	310	show_usage(argc, argv);
	311	return -1;
	312	}
	313
	314	for (i = 4; i < argc; i++) {
	315	if (argv[i][0] != '-')
	316	continue;
	317	switch (argv[i][1]) {
	318	#ifdef DEBUG_YIELD
	319	case 'r':
	320	yield_active \|= YIELD_READ;
	321	break;
	322	case 'w':
	323	yield_active \|= YIELD_WRITE;
	324	break;
	325	#endif
9e97e478 MD	326	case 'a':
	327	if (argc < i + 2) {
	328	show_usage(argc, argv);
	329	return -1;
	330	}
	331	a = atoi(argv[++i]);
2a7ac59d	332	cpu_affinities[next_aff++] = a;
9e97e478	333	use_affinity = 1;
4bad7d45	334	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	335	break;
8b632bab MD	336	case 'c':
	337	if (argc < i + 2) {
	338	show_usage(argc, argv);
	339	return -1;
	340	}
9e31d0f0	341	rduration = atol(argv[++i]);
8b632bab	342	break;
0ee8bb0a MD	343	case 'd':
	344	if (argc < i + 2) {
	345	show_usage(argc, argv);
	346	return -1;
	347	}
9e31d0f0	348	wdelay = atol(argv[++i]);
0ee8bb0a	349	break;
31b598e0 MD	350	case 'e':
	351	if (argc < i + 2) {
	352	show_usage(argc, argv);
	353	return -1;
	354	}
	355	wduration = atol(argv[++i]);
	356	break;
4bad7d45 MD	357	case 'v':
	358	verbose_mode = 1;
	359	break;
0ee8bb0a MD	360	}
	361	}
	362
4bad7d45	363	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a	364	duration, nr_readers, nr_writers);
9e31d0f0	365	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	366	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	367	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	368	"main", pthread_self(), (unsigned long)gettid());
	369
	370	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	371	tid_writer = malloc(sizeof(tid_writer) nr_writers);
0ee8bb0a MD	372	tot_nr_reads = malloc(sizeof(tot_nr_reads) nr_readers);
	373	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	374	per_thread_lock = malloc(sizeof(per_thread_lock) nr_readers);
dee09338 MD	375	for (i = 0; i < nr_readers; i++) {
	376	err = pthread_mutex_init(&per_thread_lock[i].lock, NULL);
	377	if (err != 0)
	378	exit(1);
	379	}
0ee8bb0a	380
2a7ac59d MD	381	next_aff = 0;
2a7ac59d MD	382
0ee8bb0a MD	383	for (i = 0; i < nr_readers; i++) {
	384	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	385	(void *)(long)i);
	386	if (err != 0)
	387	exit(1);
	388	}
	389	for (i = 0; i < nr_writers; i++) {
	390	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	391	(void *)(long)i);
	392	if (err != 0)
	393	exit(1);
	394	}
	395
5481ddb3	396	cmm_smp_mb();
0ee8bb0a	397
78efb485 MD	398	test_go = 1;
	399
	400	sleep(duration);
	401
	402	test_stop = 1;
	403
0ee8bb0a MD	404	for (i = 0; i < nr_readers; i++) {
	405	err = pthread_join(tid_reader[i], &tret);
	406	if (err != 0)
	407	exit(1);
	408	tot_reads += tot_nr_reads[i];
	409	}
	410	for (i = 0; i < nr_writers; i++) {
	411	err = pthread_join(tid_writer[i], &tret);
	412	if (err != 0)
	413	exit(1);
	414	tot_writes += tot_nr_writes[i];
	415	}
4bad7d45 MD	416
4bad7d45 MD	417	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a	418	tot_writes);
a50a7b43	419	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	420	"nr_writers %3u "
9e31d0f0	421	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	422	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	423	nr_writers, wdelay, tot_reads, tot_writes,
	424	tot_reads + tot_writes);
	425
0ee8bb0a MD	426	free(tid_reader);
0ee8bb0a MD	427	free(tid_writer);
0ee8bb0a MD	428	free(tot_nr_reads);
	429	free(tot_nr_writes);
	430	free(per_thread_lock);
	431	return 0;
	432	}