[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 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;

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