[userspace-rcu.git] / tests / test_urcu_qsbr.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 <errno.h>

#include <urcu/arch.h>
#include <urcu/tls-compat.h>
#include "cpuset.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-qsbr.h"

struct test_array {
	int a;
};

static volatile int test_go, test_stop;

static unsigned long wdelay;

static struct test_array *test_rcu_pointer;

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 l)
{
	while(l-- != 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;

static void set_affinity(void)
{
	cpu_set_t mask;
	int cpu;
	int ret;

	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 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);
	}
}

/*
 * malloc/free are reusing memory areas too quickly, which does not let us
 * test races appropriately. Use a large circular array for allocations.
 * ARRAY_SIZE is larger than nr_writers, and we keep the mutex across
 * both alloc and free, which insures we never run over our tail.
 */
#define ARRAY_SIZE (1048576 * nr_writers)
#define ARRAY_POISON 0xDEADBEEF
static int array_index;
static struct test_array *test_array;

static struct test_array *test_array_alloc(void)
{
	struct test_array *ret;
	int index;

	index = array_index % ARRAY_SIZE;
	assert(test_array[index].a == ARRAY_POISON ||
		test_array[index].a == 0);
	ret = &test_array[index];
	array_index++;
	if (array_index == ARRAY_SIZE)
		array_index = 0;
	return ret;
}

static void test_array_free(struct test_array *ptr)
{
	if (!ptr)
		return;
	ptr->a = ARRAY_POISON;
}

void *thr_reader(void *_count)
{
	unsigned long long *count = _count;
	struct test_array *local_ptr;

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

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		rcu_read_lock();
		local_ptr = rcu_dereference(test_rcu_pointer);
		debug_yield_read();
		if (local_ptr)
			assert(local_ptr->a == 8);
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
		rcu_read_unlock();
		URCU_TLS(nr_reads)++;
		/* QS each 1024 reads */
		if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
			rcu_quiescent_state();
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	rcu_unregister_thread();

	/* test extra thread registration */
	rcu_register_thread();
	rcu_unregister_thread();

	*count = 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 *_count)
{
	unsigned long long *count = _count;
	struct test_array *new, *old;

	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 (;;) {
		rcu_copy_mutex_lock();
		new = test_array_alloc();
		new->a = 8;
		old = rcu_xchg_pointer(&test_rcu_pointer, new);
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		synchronize_rcu();
		/* can be done after unlock */
		if (old)
			old->a = 0;
		test_array_free(old);
		rcu_copy_mutex_unlock();
		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());
	*count = 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 *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;
	}

	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());

	test_array = calloc(1, sizeof(*test_array) * ARRAY_SIZE);
	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	count_reader = calloc(nr_readers, sizeof(*count_reader));
	count_writer = calloc(nr_writers, sizeof(*count_writer));

	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);
	}

	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 += 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 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);
	test_array_free(test_rcu_pointer);
	free(test_array);
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
	return 0;
}
Commit	Line	Data
de10a585 MD	1	/*
	2	* test_urcu.c
	3	*
	4	* Userspace RCU library - test program
	5	*
	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	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
	23	#define _GNU_SOURCE
	24	#include "../config.h"
	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>
de10a585 MD	34	#include <errno.h>
	35
	36	#include <urcu/arch.h>
bd252a04	37	#include <urcu/tls-compat.h>
95d8822d	38	#include "cpuset.h"
de10a585 MD	39
	40	#ifdef __linux__
	41	#include <syscall.h>
	42	#endif
	43
	44	/* hardcoded number of CPUs */
	45	#define NR_CPUS 16384
	46
	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
	67	#include "urcu-qsbr.h"
	68
	69	struct test_array {
	70	int a;
	71	};
	72
	73	static volatile int test_go, test_stop;
	74
	75	static unsigned long wdelay;
	76
	77	static struct test_array *test_rcu_pointer;
	78
	79	static unsigned long duration;
	80
	81	/* read-side C.S. duration, in loops */
	82	static unsigned long rduration;
	83
	84	/* write-side C.S. duration, in loops */
	85	static unsigned long wduration;
	86
	87	static inline void loop_sleep(unsigned long l)
	88	{
	89	while(l-- != 0)
	90	caa_cpu_relax();
	91	}
	92
	93	static int verbose_mode;
	94
	95	#define printf_verbose(fmt, args...) \
	96	do { \
	97	if (verbose_mode) \
	98	printf(fmt, args); \
	99	} while (0)
	100
	101	static unsigned int cpu_affinities[NR_CPUS];
	102	static unsigned int next_aff = 0;
103	static int use_affinity = 0;
104
105	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
106
de10a585 MD	107	static void set_affinity(void)
	108	{
	109	cpu_set_t mask;
	110	int cpu;
	111	int ret;
	112
	113	if (!use_affinity)
	114	return;
	115
	116	#if HAVE_SCHED_SETAFFINITY
	117	ret = pthread_mutex_lock(&affinity_mutex);
	118	if (ret) {
	119	perror("Error in pthread mutex lock");
	120	exit(-1);
	121	}
	122	cpu = cpu_affinities[next_aff++];
	123	ret = pthread_mutex_unlock(&affinity_mutex);
	124	if (ret) {
	125	perror("Error in pthread mutex unlock");
	126	exit(-1);
	127	}
	128	CPU_ZERO(&mask);
	129	CPU_SET(cpu, &mask);
	130	#if SCHED_SETAFFINITY_ARGS == 2
	131	sched_setaffinity(0, &mask);
	132	#else
	133	sched_setaffinity(0, sizeof(mask), &mask);
	134	#endif
	135	#endif /* HAVE_SCHED_SETAFFINITY */
	136	}
	137
	138	/*
	139	* returns 0 if test should end.
	140	*/
	141	static int test_duration_write(void)
	142	{
	143	return !test_stop;
	144	}
	145
	146	static int test_duration_read(void)
	147	{
	148	return !test_stop;
	149	}
	150
bd252a04 MD	151	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	152	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
de10a585 MD	153
	154	static unsigned int nr_readers;
	155	static unsigned int nr_writers;
	156
	157	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	158
	159	void rcu_copy_mutex_lock(void)
	160	{
	161	int ret;
	162	ret = pthread_mutex_lock(&rcu_copy_mutex);
	163	if (ret) {
	164	perror("Error in pthread mutex lock");
	165	exit(-1);
	166	}
	167	}
	168
	169	void rcu_copy_mutex_unlock(void)
	170	{
	171	int ret;
	172
	173	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	174	if (ret) {
	175	perror("Error in pthread mutex unlock");
	176	exit(-1);
	177	}
	178	}
	179
	180	/*
	181	* malloc/free are reusing memory areas too quickly, which does not let us
	182	* test races appropriately. Use a large circular array for allocations.
	183	* ARRAY_SIZE is larger than nr_writers, and we keep the mutex across
	184	* both alloc and free, which insures we never run over our tail.
	185	*/
	186	#define ARRAY_SIZE (1048576 * nr_writers)
	187	#define ARRAY_POISON 0xDEADBEEF
	188	static int array_index;
	189	static struct test_array *test_array;
	190
	191	static struct test_array *test_array_alloc(void)
	192	{
	193	struct test_array *ret;
	194	int index;
	195
	196	index = array_index % ARRAY_SIZE;
	197	assert(test_array[index].a == ARRAY_POISON \|\|
	198	test_array[index].a == 0);
	199	ret = &test_array[index];
	200	array_index++;
	201	if (array_index == ARRAY_SIZE)
	202	array_index = 0;
	203	return ret;
	204	}
	205
	206	static void test_array_free(struct test_array *ptr)
	207	{
	208	if (!ptr)
	209	return;
	210	ptr->a = ARRAY_POISON;
	211	}
	212
	213	void thr_reader(void _count)
	214	{
	215	unsigned long long *count = _count;
	216	struct test_array *local_ptr;
217
218	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
2d72fae2 MD	219	"reader", (unsigned long) pthread_self(),
2d72fae2 MD	220	(unsigned long) gettid());
de10a585 MD	221
	222	set_affinity();
	223
	224	rcu_register_thread();
	225
	226	while (!test_go)
	227	{
	228	}
	229	cmm_smp_mb();
	230
	231	for (;;) {
	232	rcu_read_lock();
	233	local_ptr = rcu_dereference(test_rcu_pointer);
	234	debug_yield_read();
	235	if (local_ptr)
	236	assert(local_ptr->a == 8);
a0b7f7ea	237	if (caa_unlikely(rduration))
de10a585 MD	238	loop_sleep(rduration);
de10a585 MD	239	rcu_read_unlock();
bd252a04	240	URCU_TLS(nr_reads)++;
de10a585	241	/* QS each 1024 reads */
bd252a04	242	if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
de10a585	243	rcu_quiescent_state();
a0b7f7ea	244	if (caa_unlikely(!test_duration_read()))
de10a585 MD	245	break;
	246	}
	247
	248	rcu_unregister_thread();
	249
	250	/* test extra thread registration */
	251	rcu_register_thread();
	252	rcu_unregister_thread();
	253
bd252a04	254	*count = URCU_TLS(nr_reads);
de10a585	255	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
2d72fae2 MD	256	"reader", (unsigned long) pthread_self(),
2d72fae2 MD	257	(unsigned long) gettid());
de10a585 MD	258	return ((void*)1);
	259
	260	}
	261
	262	void thr_writer(void _count)
	263	{
	264	unsigned long long *count = _count;
	265	struct test_array new, old;
	266
	267	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
2d72fae2 MD	268	"writer", (unsigned long) pthread_self(),
2d72fae2 MD	269	(unsigned long) gettid());
de10a585 MD	270
	271	set_affinity();
	272
	273	while (!test_go)
	274	{
	275	}
	276	cmm_smp_mb();
	277
	278	for (;;) {
	279	rcu_copy_mutex_lock();
	280	new = test_array_alloc();
	281	new->a = 8;
	282	old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea	283	if (caa_unlikely(wduration))
de10a585 MD	284	loop_sleep(wduration);
	285	synchronize_rcu();
	286	/* can be done after unlock */
	287	if (old)
	288	old->a = 0;
	289	test_array_free(old);
	290	rcu_copy_mutex_unlock();
bd252a04	291	URCU_TLS(nr_writes)++;
a0b7f7ea	292	if (caa_unlikely(!test_duration_write()))
de10a585	293	break;
a0b7f7ea	294	if (caa_unlikely(wdelay))
de10a585 MD	295	loop_sleep(wdelay);
	296	}
	297
	298	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
2d72fae2 MD	299	"writer", (unsigned long) pthread_self(),
2d72fae2 MD	300	(unsigned long) gettid());
bd252a04	301	*count = URCU_TLS(nr_writes);
de10a585 MD	302	return ((void*)2);
	303	}
	304
	305	void show_usage(int argc, char **argv)
	306	{
	307	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	308	#ifdef DEBUG_YIELD
	309	printf(" [-r] [-w] (yield reader and/or writer)");
	310	#endif
	311	printf(" [-d delay] (writer period (us))");
	312	printf(" [-c duration] (reader C.S. duration (in loops))");
	313	printf(" [-e duration] (writer C.S. duration (in loops))");
	314	printf(" [-v] (verbose output)");
	315	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	316	printf("\n");
	317	}
	318
	319	int main(int argc, char **argv)
	320	{
	321	int err;
	322	pthread_t tid_reader, tid_writer;
	323	void *tret;
	324	unsigned long long count_reader, count_writer;
	325	unsigned long long tot_reads = 0, tot_writes = 0;
	326	int i, a;
	327
	328	if (argc < 4) {
	329	show_usage(argc, argv);
	330	return -1;
	331	}
	332
	333	err = sscanf(argv[1], "%u", &nr_readers);
	334	if (err != 1) {
	335	show_usage(argc, argv);
	336	return -1;
	337	}
	338
	339	err = sscanf(argv[2], "%u", &nr_writers);
	340	if (err != 1) {
	341	show_usage(argc, argv);
	342	return -1;
	343	}
	344
	345	err = sscanf(argv[3], "%lu", &duration);
	346	if (err != 1) {
	347	show_usage(argc, argv);
	348	return -1;
	349	}
	350
	351	for (i = 4; i < argc; i++) {
	352	if (argv[i][0] != '-')
	353	continue;
	354	switch (argv[i][1]) {
	355	#ifdef DEBUG_YIELD
	356	case 'r':
	357	yield_active \|= YIELD_READ;
	358	break;
	359	case 'w':
	360	yield_active \|= YIELD_WRITE;
	361	break;
	362	#endif
	363	case 'a':
	364	if (argc < i + 2) {
	365	show_usage(argc, argv);
366	return -1;
367	}
368	a = atoi(argv[++i]);
369	cpu_affinities[next_aff++] = a;
370	use_affinity = 1;
371	printf_verbose("Adding CPU %d affinity\n", a);
372	break;
373	case 'c':
374	if (argc < i + 2) {
375	show_usage(argc, argv);
376	return -1;
377	}
378	rduration = atol(argv[++i]);
379	break;
380	case 'd':
381	if (argc < i + 2) {
382	show_usage(argc, argv);
383	return -1;
384	}
385	wdelay = atol(argv[++i]);
386	break;
387	case 'e':
388	if (argc < i + 2) {
389	show_usage(argc, argv);
390	return -1;
391	}
392	wduration = atol(argv[++i]);
393	break;
394	case 'v':
395	verbose_mode = 1;
396	break;
397	}
398	}
399
400	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
401	duration, nr_readers, nr_writers);
402	printf_verbose("Writer delay : %lu loops.\n", wdelay);
403	printf_verbose("Reader duration : %lu loops.\n", rduration);
404	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
2d72fae2 MD	405	"main", (unsigned long) pthread_self(),
2d72fae2 MD	406	(unsigned long) gettid());
de10a585 MD	407
de10a585 MD	408	test_array = calloc(1, sizeof(test_array) ARRAY_SIZE);
f90535ef MD	409	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	410	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	411	count_reader = calloc(nr_readers, sizeof(*count_reader));
	412	count_writer = calloc(nr_writers, sizeof(*count_writer));
de10a585 MD	413
	414	next_aff = 0;
	415
	416	for (i = 0; i < nr_readers; i++) {
	417	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	418	&count_reader[i]);
	419	if (err != 0)
	420	exit(1);
	421	}
	422	for (i = 0; i < nr_writers; i++) {
	423	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	424	&count_writer[i]);
	425	if (err != 0)
	426	exit(1);
	427	}
	428
	429	cmm_smp_mb();
	430
	431	test_go = 1;
	432
	433	sleep(duration);
	434
	435	test_stop = 1;
	436
	437	for (i = 0; i < nr_readers; i++) {
	438	err = pthread_join(tid_reader[i], &tret);
	439	if (err != 0)
	440	exit(1);
	441	tot_reads += count_reader[i];
	442	}
	443	for (i = 0; i < nr_writers; i++) {
	444	err = pthread_join(tid_writer[i], &tret);
	445	if (err != 0)
	446	exit(1);
	447	tot_writes += count_writer[i];
	448	}
	449
	450	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	451	tot_writes);
	452	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
	453	"nr_writers %3u "
	454	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
	455	argv[0], duration, nr_readers, rduration, wduration,
	456	nr_writers, wdelay, tot_reads, tot_writes,
	457	tot_reads + tot_writes);
	458	test_array_free(test_rcu_pointer);
	459	free(test_array);
	460	free(tid_reader);
	461	free(tid_writer);
	462	free(count_reader);
	463	free(count_writer);
	464	return 0;
	465	}