[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 <sys/syscall.h>
#include <sched.h>
#include <errno.h>

#include <urcu/arch.h>

/* 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 unsigned long long __thread nr_writes;
static unsigned long long __thread 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 (unlikely(rduration))
			loop_sleep(rduration);
		rcu_read_unlock();
		nr_reads++;
		if (unlikely(!test_duration_read()))
			break;
	}

	rcu_unregister_thread();

	*count = 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 (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);
		nr_writes++;
		if (unlikely(!test_duration_write()))
			break;
		if (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] = 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
90075a50	1	/*
786ee85b	2	* test_urcu_defer.c
90075a50 MD	3	*
	4	* Userspace RCU library - test program (with automatic reclamation)
	5	*
6982d6d7	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
90075a50 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
	23	#define _GNU_SOURCE
d8540fc5	24	#include "../config.h"
90075a50 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>
	34	#include <sys/syscall.h>
	35	#include <sched.h>
94b343fd	36	#include <errno.h>
90075a50	37
ec4e58a3	38	#include <urcu/arch.h>
90075a50	39
90075a50 MD	40	/* hardcoded number of CPUs */
	41	#define NR_CPUS 16384
	42
	43	#if defined(_syscall0)
	44	_syscall0(pid_t, gettid)
	45	#elif defined(__NR_gettid)
	46	static inline pid_t gettid(void)
	47	{
	48	return syscall(__NR_gettid);
	49	}
	50	#else
	51	#warning "use pid as tid"
	52	static inline pid_t gettid(void)
	53	{
	54	return getpid();
	55	}
	56	#endif
	57
	58	#ifndef DYNAMIC_LINK_TEST
	59	#define _LGPL_SOURCE
	60	#else
	61	#define debug_yield_read()
	62	#endif
ec4e58a3 MD	63	#include <urcu.h>
ec4e58a3 MD	64	#include <urcu-defer.h>
90075a50 MD	65
	66	struct test_array {
	67	int a;
	68	};
	69
	70	static volatile int test_go, test_stop;
	71
	72	static unsigned long wdelay;
	73
	74	static struct test_array *test_rcu_pointer;
	75
	76	static unsigned long duration;
	77
	78	/* read-side C.S. duration, in loops */
	79	static unsigned long rduration;
	80
31b598e0 MD	81	/* write-side C.S. duration, in loops */
	82	static unsigned long wduration;
	83
90075a50 MD	84	static inline void loop_sleep(unsigned long l)
	85	{
	86	while(l-- != 0)
06f22bdb	87	caa_cpu_relax();
90075a50 MD	88	}
	89
	90	static int verbose_mode;
	91
	92	#define printf_verbose(fmt, args...) \
	93	do { \
	94	if (verbose_mode) \
	95	printf(fmt, args); \
	96	} while (0)
	97
	98	static unsigned int cpu_affinities[NR_CPUS];
	99	static unsigned int next_aff = 0;
	100	static int use_affinity = 0;
	101
	102	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	103
d8540fc5 PA	104	#ifndef HAVE_CPU_SET_T
	105	typedef unsigned long cpu_set_t;
	106	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	107	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	108	#endif
	109
90075a50 MD	110	static void set_affinity(void)
	111	{
	112	cpu_set_t mask;
	113	int cpu;
	114	int ret;
	115
	116	if (!use_affinity)
	117	return;
	118
d8540fc5	119	#if HAVE_SCHED_SETAFFINITY
90075a50 MD	120	ret = pthread_mutex_lock(&affinity_mutex);
	121	if (ret) {
	122	perror("Error in pthread mutex lock");
	123	exit(-1);
	124	}
	125	cpu = cpu_affinities[next_aff++];
	126	ret = pthread_mutex_unlock(&affinity_mutex);
	127	if (ret) {
	128	perror("Error in pthread mutex unlock");
	129	exit(-1);
	130	}
d8540fc5	131
90075a50 MD	132	CPU_ZERO(&mask);
90075a50 MD	133	CPU_SET(cpu, &mask);
d8540fc5 PA	134	#if SCHED_SETAFFINITY_ARGS == 2
	135	sched_setaffinity(0, &mask);
	136	#else
90075a50	137	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	138	#endif
d8540fc5 PA	139	#endif /* HAVE_SCHED_SETAFFINITY */
90075a50 MD	140	}
	141
	142	/*
	143	* returns 0 if test should end.
	144	*/
	145	static int test_duration_write(void)
	146	{
	147	return !test_stop;
	148	}
	149
	150	static int test_duration_read(void)
	151	{
	152	return !test_stop;
	153	}
	154
	155	static unsigned long long __thread nr_writes;
	156	static unsigned long long __thread nr_reads;
	157
	158	static
06f22bdb	159	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
90075a50 MD	160
	161	static unsigned int nr_readers;
	162	static unsigned int nr_writers;
	163
	164	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	165
	166	void rcu_copy_mutex_lock(void)
	167	{
	168	int ret;
	169	ret = pthread_mutex_lock(&rcu_copy_mutex);
	170	if (ret) {
	171	perror("Error in pthread mutex lock");
	172	exit(-1);
	173	}
	174	}
	175
	176	void rcu_copy_mutex_unlock(void)
	177	{
	178	int ret;
	179
	180	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	181	if (ret) {
	182	perror("Error in pthread mutex unlock");
	183	exit(-1);
	184	}
	185	}
	186
	187	void thr_reader(void _count)
	188	{
	189	unsigned long long *count = _count;
	190	struct test_array *local_ptr;
	191
	192	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	193	"reader", pthread_self(), (unsigned long)gettid());
	194
	195	set_affinity();
	196
	197	rcu_register_thread();
	198
	199	while (!test_go)
	200	{
	201	}
5481ddb3	202	cmm_smp_mb();
90075a50 MD	203
	204	for (;;) {
	205	rcu_read_lock();
	206	local_ptr = rcu_dereference(test_rcu_pointer);
	207	debug_yield_read();
	208	if (local_ptr)
	209	assert(local_ptr->a == 8);
	210	if (unlikely(rduration))
	211	loop_sleep(rduration);
	212	rcu_read_unlock();
	213	nr_reads++;
	214	if (unlikely(!test_duration_read()))
	215	break;
	216	}
	217
	218	rcu_unregister_thread();
	219
	220	*count = nr_reads;
	221	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	222	"reader", pthread_self(), (unsigned long)gettid());
	223	return ((void*)1);
	224
	225	}
	226
804b4375 MD	227	static void test_cb2(void *data)
	228	{
	229	}
	230
	231	static void test_cb1(void *data)
	232	{
	233	}
	234
90075a50 MD	235	void thr_writer(void data)
	236	{
	237	unsigned long wtidx = (unsigned long)data;
	238	struct test_array new, old = NULL;
6ade67d5	239	int ret;
90075a50 MD	240
	241	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	242	"writer", pthread_self(), (unsigned long)gettid());
	243
	244	set_affinity();
	245
6ade67d5 MD	246	ret = rcu_defer_register_thread();
	247	if (ret) {
	248	printf("Error in rcu_defer_register_thread\n");
	249	exit(-1);
	250	}
90075a50 MD	251
	252	while (!test_go)
	253	{
	254	}
5481ddb3	255	cmm_smp_mb();
90075a50 MD	256
	257	for (;;) {
	258	new = malloc(sizeof(*new));
	259	new->a = 8;
	260	old = rcu_xchg_pointer(&test_rcu_pointer, new);
31b598e0 MD	261	if (unlikely(wduration))
31b598e0 MD	262	loop_sleep(wduration);
b4f313b7 MD	263	defer_rcu(free, old);
	264	defer_rcu(test_cb1, old);
	265	defer_rcu(test_cb1, (void *)-2L);
	266	defer_rcu(test_cb1, (void *)-2L);
	267	defer_rcu(test_cb1, old);
	268	defer_rcu(test_cb2, (void *)-2L);
	269	defer_rcu(test_cb2, (void *)-4L);
	270	defer_rcu(test_cb2, (void *)-2L);
90075a50 MD	271	nr_writes++;
	272	if (unlikely(!test_duration_write()))
	273	break;
	274	if (unlikely(wdelay))
	275	loop_sleep(wdelay);
	276	}
	277
786ee85b	278	rcu_defer_unregister_thread();
90075a50 MD	279
	280	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	281	"writer", pthread_self(), (unsigned long)gettid());
	282	tot_nr_writes[wtidx] = nr_writes;
	283	return ((void*)2);
	284	}
	285
	286	void show_usage(int argc, char **argv)
	287	{
	288	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	289	#ifdef DEBUG_YIELD
	290	printf(" [-r] [-w] (yield reader and/or writer)");
	291	#endif
	292	printf(" [-d delay] (writer period (us))");
	293	printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0	294	printf(" [-e duration] (writer C.S. duration (in loops))");
90075a50 MD	295	printf(" [-v] (verbose output)");
	296	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	297	printf("\n");
	298	}
	299
	300	int main(int argc, char **argv)
	301	{
	302	int err;
	303	pthread_t tid_reader, tid_writer;
	304	void *tret;
	305	unsigned long long *count_reader;
	306	unsigned long long tot_reads = 0, tot_writes = 0;
	307	int i, a;
	308
	309	if (argc < 4) {
	310	show_usage(argc, argv);
	311	return -1;
	312	}
	313
	314	err = sscanf(argv[1], "%u", &nr_readers);
	315	if (err != 1) {
	316	show_usage(argc, argv);
	317	return -1;
	318	}
	319
	320	err = sscanf(argv[2], "%u", &nr_writers);
	321	if (err != 1) {
	322	show_usage(argc, argv);
	323	return -1;
	324	}
	325
	326	err = sscanf(argv[3], "%lu", &duration);
	327	if (err != 1) {
	328	show_usage(argc, argv);
	329	return -1;
	330	}
	331
	332	for (i = 4; i < argc; i++) {
	333	if (argv[i][0] != '-')
	334	continue;
	335	switch (argv[i][1]) {
	336	#ifdef DEBUG_YIELD
	337	case 'r':
	338	yield_active \|= YIELD_READ;
	339	break;
	340	case 'w':
	341	yield_active \|= YIELD_WRITE;
	342	break;
	343	#endif
	344	case 'a':
	345	if (argc < i + 2) {
	346	show_usage(argc, argv);
	347	return -1;
	348	}
	349	a = atoi(argv[++i]);
	350	cpu_affinities[next_aff++] = a;
	351	use_affinity = 1;
	352	printf_verbose("Adding CPU %d affinity\n", a);
	353	break;
	354	case 'c':
	355	if (argc < i + 2) {
	356	show_usage(argc, argv);
	357	return -1;
	358	}
359	rduration = atol(argv[++i]);
360	break;
361	case 'd':
362	if (argc < i + 2) {
363	show_usage(argc, argv);
364	return -1;
365	}
366	wdelay = atol(argv[++i]);
367	break;
31b598e0 MD	368	case 'e':
	369	if (argc < i + 2) {
	370	show_usage(argc, argv);
	371	return -1;
	372	}
	373	wduration = atol(argv[++i]);
	374	break;
90075a50 MD	375	case 'v':
	376	verbose_mode = 1;
	377	break;
	378	}
	379	}
	380
	381	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	382	duration, nr_readers, nr_writers);
	383	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	384	printf_verbose("Reader duration : %lu loops.\n", rduration);
	385	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
	386	"main", pthread_self(), (unsigned long)gettid());
	387
	388	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	389	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	390	count_reader = malloc(sizeof(count_reader) nr_readers);
	391	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	392
	393	next_aff = 0;
	394
	395	for (i = 0; i < nr_readers; i++) {
	396	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	397	&count_reader[i]);
	398	if (err != 0)
	399	exit(1);
	400	}
	401	for (i = 0; i < nr_writers; i++) {
	402	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	403	(void *)(long)i);
	404	if (err != 0)
	405	exit(1);
	406	}
	407
5481ddb3	408	cmm_smp_mb();
90075a50 MD	409
	410	test_go = 1;
	411
	412	sleep(duration);
	413
	414	test_stop = 1;
	415
	416	for (i = 0; i < nr_readers; i++) {
	417	err = pthread_join(tid_reader[i], &tret);
	418	if (err != 0)
	419	exit(1);
	420	tot_reads += count_reader[i];
	421	}
	422	for (i = 0; i < nr_writers; i++) {
	423	err = pthread_join(tid_writer[i], &tret);
	424	if (err != 0)
	425	exit(1);
	426	tot_writes += tot_nr_writes[i];
	427	}
	428
	429	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	430	tot_writes);
a50a7b43	431	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
90075a50 MD	432	"nr_writers %3u "
90075a50 MD	433	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	434	argv[0], duration, nr_readers, rduration, wduration,
90075a50 MD	435	nr_writers, wdelay, tot_reads, tot_writes,
	436	tot_reads + tot_writes);
	437	free(tid_reader);
	438	free(tid_writer);
	439	free(count_reader);
	440	free(tot_nr_writes);
	441
	442	return 0;
	443	}