[urcu.git] / tests / test_urcu_defer.c

/*
 * test_urcu_defer.c
 *
 * Userspace RCU library - test program (with automatic reclamation)
 *
 * 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>
#include <urcu-defer.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 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 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 *_count)
{
	unsigned long long *count = _count;
	struct test_array *local_ptr;

	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
			"reader", 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)++;
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	rcu_unregister_thread();

	*count = URCU_TLS(nr_reads);
	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"reader", pthread_self(), (unsigned long)gettid());
	return ((void*)1);

}

static void test_cb2(void *data)
{
}

static void test_cb1(void *data)
{
}

void *thr_writer(void *data)
{
	unsigned long wtidx = (unsigned long)data;
	struct test_array *new, *old = NULL;
	int ret;

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

	set_affinity();

	ret = rcu_defer_register_thread();
	if (ret) {
		printf("Error in rcu_defer_register_thread\n");
		exit(-1);
	}

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		new = malloc(sizeof(*new));
		new->a = 8;
		old = rcu_xchg_pointer(&test_rcu_pointer, new);
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		defer_rcu(free, old);
		defer_rcu(test_cb1, old);
		defer_rcu(test_cb1, (void *)-2L);
		defer_rcu(test_cb1, (void *)-2L);
		defer_rcu(test_cb1, old);
		defer_rcu(test_cb2, (void *)-2L);
		defer_rcu(test_cb2, (void *)-4L);
		defer_rcu(test_cb2, (void *)-2L);
		URCU_TLS(nr_writes)++;
		if (caa_unlikely(!test_duration_write()))
			break;
		if (caa_unlikely(wdelay))
			loop_sleep(wdelay);
	}

	rcu_defer_unregister_thread();

	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 *count_reader;
	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", pthread_self(), (unsigned long)gettid());

	tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
	tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
	count_reader = malloc(sizeof(*count_reader) * nr_readers);
	tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);

	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,
				     (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 += count_reader[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(count_reader);
	free(tot_nr_writes);

	return 0;
}
Commit	Line	Data
	1	/*
	2	* test_urcu_defer.c
	3	*
	4	* Userspace RCU library - test program (with automatic reclamation)
	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>
	34	#include <sched.h>
	35	#include <errno.h>
	36
	37	#include <urcu/arch.h>
	38	#include <urcu/tls-compat.h>
	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.h>
	68	#include <urcu-defer.h>
	69
	70	struct test_array {
	71	int a;
	72	};
	73
	74	static volatile int test_go, test_stop;
	75
	76	static unsigned long wdelay;
	77
	78	static struct test_array *test_rcu_pointer;
	79
	80	static unsigned long duration;
	81
	82	/* read-side C.S. duration, in loops */
	83	static unsigned long rduration;
	84
	85	/* write-side C.S. duration, in loops */
	86	static unsigned long wduration;
	87
	88	static inline void loop_sleep(unsigned long loops)
	89	{
	90	while (loops-- != 0)
	91	caa_cpu_relax();
	92	}
	93
	94	static int verbose_mode;
	95
	96	#define printf_verbose(fmt, args...) \
	97	do { \
	98	if (verbose_mode) \
	99	printf(fmt, args); \
	100	} while (0)
	101
	102	static unsigned int cpu_affinities[NR_CPUS];
	103	static unsigned int next_aff = 0;
	104	static int use_affinity = 0;
	105
	106	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	107
	108	#ifndef HAVE_CPU_SET_T
	109	typedef unsigned long cpu_set_t;
	110	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	111	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	112	#endif
	113
	114	static void set_affinity(void)
	115	{
	116	#if HAVE_SCHED_SETAFFINITY
	117	cpu_set_t mask;
	118	int cpu, ret;
	119	#endif /* HAVE_SCHED_SETAFFINITY */
	120
	121	if (!use_affinity)
	122	return;
	123
	124	#if HAVE_SCHED_SETAFFINITY
	125	ret = pthread_mutex_lock(&affinity_mutex);
	126	if (ret) {
	127	perror("Error in pthread mutex lock");
	128	exit(-1);
	129	}
	130	cpu = cpu_affinities[next_aff++];
	131	ret = pthread_mutex_unlock(&affinity_mutex);
	132	if (ret) {
	133	perror("Error in pthread mutex unlock");
	134	exit(-1);
	135	}
	136
	137	CPU_ZERO(&mask);
	138	CPU_SET(cpu, &mask);
	139	#if SCHED_SETAFFINITY_ARGS == 2
	140	sched_setaffinity(0, &mask);
	141	#else
	142	sched_setaffinity(0, sizeof(mask), &mask);
	143	#endif
	144	#endif /* HAVE_SCHED_SETAFFINITY */
	145	}
	146
	147	/*
	148	* returns 0 if test should end.
	149	*/
	150	static int test_duration_write(void)
	151	{
	152	return !test_stop;
	153	}
	154
	155	static int test_duration_read(void)
	156	{
	157	return !test_stop;
	158	}
	159
	160	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
	161	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
	162
	163	static
	164	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
	165
	166	static unsigned int nr_readers;
	167	static unsigned int nr_writers;
	168
	169	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	170
	171	void rcu_copy_mutex_lock(void)
	172	{
	173	int ret;
	174	ret = pthread_mutex_lock(&rcu_copy_mutex);
	175	if (ret) {
	176	perror("Error in pthread mutex lock");
	177	exit(-1);
	178	}
	179	}
	180
	181	void rcu_copy_mutex_unlock(void)
	182	{
	183	int ret;
	184
	185	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	186	if (ret) {
	187	perror("Error in pthread mutex unlock");
	188	exit(-1);
	189	}
	190	}
	191
	192	void thr_reader(void _count)
	193	{
	194	unsigned long long *count = _count;
	195	struct test_array *local_ptr;
	196
	197	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	198	"reader", pthread_self(), (unsigned long)gettid());
	199
	200	set_affinity();
	201
	202	rcu_register_thread();
	203
	204	while (!test_go)
	205	{
	206	}
	207	cmm_smp_mb();
	208
	209	for (;;) {
	210	rcu_read_lock();
	211	local_ptr = rcu_dereference(test_rcu_pointer);
	212	debug_yield_read();
	213	if (local_ptr)
	214	assert(local_ptr->a == 8);
	215	if (caa_unlikely(rduration))
	216	loop_sleep(rduration);
	217	rcu_read_unlock();
	218	URCU_TLS(nr_reads)++;
	219	if (caa_unlikely(!test_duration_read()))
	220	break;
	221	}
	222
	223	rcu_unregister_thread();
	224
	225	*count = URCU_TLS(nr_reads);
	226	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	227	"reader", pthread_self(), (unsigned long)gettid());
	228	return ((void*)1);
	229
	230	}
	231
	232	static void test_cb2(void *data)
	233	{
	234	}
	235
	236	static void test_cb1(void *data)
	237	{
	238	}
	239
	240	void thr_writer(void data)
	241	{
	242	unsigned long wtidx = (unsigned long)data;
	243	struct test_array new, old = NULL;
	244	int ret;
	245
	246	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	247	"writer", pthread_self(), (unsigned long)gettid());
	248
	249	set_affinity();
	250
	251	ret = rcu_defer_register_thread();
	252	if (ret) {
	253	printf("Error in rcu_defer_register_thread\n");
	254	exit(-1);
	255	}
	256
	257	while (!test_go)
	258	{
	259	}
	260	cmm_smp_mb();
	261
	262	for (;;) {
	263	new = malloc(sizeof(*new));
	264	new->a = 8;
	265	old = rcu_xchg_pointer(&test_rcu_pointer, new);
	266	if (caa_unlikely(wduration))
	267	loop_sleep(wduration);
	268	defer_rcu(free, old);
	269	defer_rcu(test_cb1, old);
	270	defer_rcu(test_cb1, (void *)-2L);
	271	defer_rcu(test_cb1, (void *)-2L);
	272	defer_rcu(test_cb1, old);
	273	defer_rcu(test_cb2, (void *)-2L);
	274	defer_rcu(test_cb2, (void *)-4L);
	275	defer_rcu(test_cb2, (void *)-2L);
	276	URCU_TLS(nr_writes)++;
	277	if (caa_unlikely(!test_duration_write()))
	278	break;
	279	if (caa_unlikely(wdelay))
	280	loop_sleep(wdelay);
	281	}
	282
	283	rcu_defer_unregister_thread();
	284
	285	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	286	"writer", pthread_self(), (unsigned long)gettid());
	287	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
	288	return ((void*)2);
	289	}
	290
	291	void show_usage(int argc, char **argv)
	292	{
	293	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	294	#ifdef DEBUG_YIELD
	295	printf(" [-r] [-w] (yield reader and/or writer)");
	296	#endif
	297	printf(" [-d delay] (writer period (us))");
	298	printf(" [-c duration] (reader C.S. duration (in loops))");
	299	printf(" [-e duration] (writer C.S. duration (in loops))");
	300	printf(" [-v] (verbose output)");
	301	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	302	printf("\n");
	303	}
	304
	305	int main(int argc, char **argv)
	306	{
	307	int err;
	308	pthread_t tid_reader, tid_writer;
	309	void *tret;
	310	unsigned long long *count_reader;
	311	unsigned long long tot_reads = 0, tot_writes = 0;
	312	int i, a;
	313
	314	if (argc < 4) {
	315	show_usage(argc, argv);
	316	return -1;
	317	}
	318
	319	err = sscanf(argv[1], "%u", &nr_readers);
	320	if (err != 1) {
	321	show_usage(argc, argv);
	322	return -1;
	323	}
	324
	325	err = sscanf(argv[2], "%u", &nr_writers);
	326	if (err != 1) {
	327	show_usage(argc, argv);
	328	return -1;
	329	}
	330
	331	err = sscanf(argv[3], "%lu", &duration);
	332	if (err != 1) {
	333	show_usage(argc, argv);
	334	return -1;
	335	}
	336
	337	for (i = 4; i < argc; i++) {
	338	if (argv[i][0] != '-')
	339	continue;
	340	switch (argv[i][1]) {
	341	#ifdef DEBUG_YIELD
	342	case 'r':
	343	yield_active \|= YIELD_READ;
	344	break;
	345	case 'w':
	346	yield_active \|= YIELD_WRITE;
	347	break;
	348	#endif
	349	case 'a':
	350	if (argc < i + 2) {
	351	show_usage(argc, argv);
	352	return -1;
	353	}
	354	a = atoi(argv[++i]);
	355	cpu_affinities[next_aff++] = a;
	356	use_affinity = 1;
	357	printf_verbose("Adding CPU %d affinity\n", a);
	358	break;
	359	case 'c':
	360	if (argc < i + 2) {
	361	show_usage(argc, argv);
	362	return -1;
	363	}
	364	rduration = atol(argv[++i]);
	365	break;
	366	case 'd':
	367	if (argc < i + 2) {
	368	show_usage(argc, argv);
	369	return -1;
	370	}
	371	wdelay = atol(argv[++i]);
	372	break;
	373	case 'e':
	374	if (argc < i + 2) {
	375	show_usage(argc, argv);
	376	return -1;
	377	}
	378	wduration = atol(argv[++i]);
	379	break;
	380	case 'v':
	381	verbose_mode = 1;
	382	break;
	383	}
	384	}
	385
	386	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	387	duration, nr_readers, nr_writers);
	388	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	389	printf_verbose("Reader duration : %lu loops.\n", rduration);
	390	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
	391	"main", pthread_self(), (unsigned long)gettid());
	392
	393	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	394	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	395	count_reader = malloc(sizeof(count_reader) nr_readers);
	396	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	397
	398	next_aff = 0;
	399
	400	for (i = 0; i < nr_readers; i++) {
	401	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	402	&count_reader[i]);
	403	if (err != 0)
	404	exit(1);
	405	}
	406	for (i = 0; i < nr_writers; i++) {
	407	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	408	(void *)(long)i);
	409	if (err != 0)
	410	exit(1);
	411	}
	412
	413	cmm_smp_mb();
	414
	415	test_go = 1;
	416
	417	sleep(duration);
	418
	419	test_stop = 1;
	420
	421	for (i = 0; i < nr_readers; i++) {
	422	err = pthread_join(tid_reader[i], &tret);
	423	if (err != 0)
	424	exit(1);
	425	tot_reads += count_reader[i];
	426	}
	427	for (i = 0; i < nr_writers; i++) {
	428	err = pthread_join(tid_writer[i], &tret);
	429	if (err != 0)
	430	exit(1);
	431	tot_writes += tot_nr_writes[i];
	432	}
	433
	434	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	435	tot_writes);
	436	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
	437	"nr_writers %3u "
	438	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
	439	argv[0], duration, nr_readers, rduration, wduration,
	440	nr_writers, wdelay, tot_reads, tot_writes,
	441	tot_reads + tot_writes);
	442	free(tid_reader);
	443	free(tid_writer);
	444	free(count_reader);
	445	free(tot_nr_writes);
	446
	447	return 0;
	448	}