[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)
		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(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)
	{
	}
	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;

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

	set_affinity();

	rcu_defer_register_thread();

	while (!test_go)
	{
	}
	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);
	}

	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)
	87	cpu_relax();
	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
	159	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
	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	}
	202	smp_mb();
	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;
	239
	240	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	241	"writer", pthread_self(), (unsigned long)gettid());
	242
	243	set_affinity();
	244
786ee85b	245	rcu_defer_register_thread();
90075a50 MD	246
	247	while (!test_go)
	248	{
	249	}
	250	smp_mb();
	251
	252	for (;;) {
	253	new = malloc(sizeof(*new));
	254	new->a = 8;
	255	old = rcu_xchg_pointer(&test_rcu_pointer, new);
31b598e0 MD	256	if (unlikely(wduration))
31b598e0 MD	257	loop_sleep(wduration);
b4f313b7 MD	258	defer_rcu(free, old);
	259	defer_rcu(test_cb1, old);
	260	defer_rcu(test_cb1, (void *)-2L);
	261	defer_rcu(test_cb1, (void *)-2L);
	262	defer_rcu(test_cb1, old);
	263	defer_rcu(test_cb2, (void *)-2L);
	264	defer_rcu(test_cb2, (void *)-4L);
	265	defer_rcu(test_cb2, (void *)-2L);
90075a50 MD	266	nr_writes++;
	267	if (unlikely(!test_duration_write()))
	268	break;
	269	if (unlikely(wdelay))
	270	loop_sleep(wdelay);
	271	}
	272
786ee85b	273	rcu_defer_unregister_thread();
90075a50 MD	274
	275	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	276	"writer", pthread_self(), (unsigned long)gettid());
	277	tot_nr_writes[wtidx] = nr_writes;
	278	return ((void*)2);
	279	}
	280
	281	void show_usage(int argc, char **argv)
	282	{
	283	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	284	#ifdef DEBUG_YIELD
	285	printf(" [-r] [-w] (yield reader and/or writer)");
	286	#endif
	287	printf(" [-d delay] (writer period (us))");
	288	printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0	289	printf(" [-e duration] (writer C.S. duration (in loops))");
90075a50 MD	290	printf(" [-v] (verbose output)");
	291	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	292	printf("\n");
	293	}
	294
	295	int main(int argc, char **argv)
	296	{
	297	int err;
	298	pthread_t tid_reader, tid_writer;
	299	void *tret;
	300	unsigned long long *count_reader;
	301	unsigned long long tot_reads = 0, tot_writes = 0;
	302	int i, a;
	303
	304	if (argc < 4) {
	305	show_usage(argc, argv);
	306	return -1;
	307	}
	308
	309	err = sscanf(argv[1], "%u", &nr_readers);
	310	if (err != 1) {
	311	show_usage(argc, argv);
	312	return -1;
	313	}
	314
	315	err = sscanf(argv[2], "%u", &nr_writers);
	316	if (err != 1) {
	317	show_usage(argc, argv);
	318	return -1;
	319	}
	320
	321	err = sscanf(argv[3], "%lu", &duration);
	322	if (err != 1) {
	323	show_usage(argc, argv);
	324	return -1;
	325	}
	326
	327	for (i = 4; i < argc; i++) {
	328	if (argv[i][0] != '-')
	329	continue;
	330	switch (argv[i][1]) {
	331	#ifdef DEBUG_YIELD
	332	case 'r':
	333	yield_active \|= YIELD_READ;
	334	break;
	335	case 'w':
	336	yield_active \|= YIELD_WRITE;
	337	break;
	338	#endif
	339	case 'a':
	340	if (argc < i + 2) {
	341	show_usage(argc, argv);
	342	return -1;
	343	}
	344	a = atoi(argv[++i]);
	345	cpu_affinities[next_aff++] = a;
	346	use_affinity = 1;
	347	printf_verbose("Adding CPU %d affinity\n", a);
	348	break;
	349	case 'c':
	350	if (argc < i + 2) {
	351	show_usage(argc, argv);
	352	return -1;
	353	}
354	rduration = atol(argv[++i]);
355	break;
356	case 'd':
357	if (argc < i + 2) {
358	show_usage(argc, argv);
359	return -1;
360	}
361	wdelay = atol(argv[++i]);
362	break;
31b598e0 MD	363	case 'e':
	364	if (argc < i + 2) {
	365	show_usage(argc, argv);
	366	return -1;
	367	}
	368	wduration = atol(argv[++i]);
	369	break;
90075a50 MD	370	case 'v':
	371	verbose_mode = 1;
	372	break;
	373	}
	374	}
	375
	376	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	377	duration, nr_readers, nr_writers);
	378	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	379	printf_verbose("Reader duration : %lu loops.\n", rduration);
	380	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
	381	"main", pthread_self(), (unsigned long)gettid());
	382
	383	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	384	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	385	count_reader = malloc(sizeof(count_reader) nr_readers);
	386	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	387
	388	next_aff = 0;
	389
	390	for (i = 0; i < nr_readers; i++) {
	391	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	392	&count_reader[i]);
	393	if (err != 0)
	394	exit(1);
	395	}
	396	for (i = 0; i < nr_writers; i++) {
	397	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	398	(void *)(long)i);
	399	if (err != 0)
	400	exit(1);
	401	}
	402
	403	smp_mb();
	404
	405	test_go = 1;
	406
	407	sleep(duration);
	408
	409	test_stop = 1;
	410
	411	for (i = 0; i < nr_readers; i++) {
	412	err = pthread_join(tid_reader[i], &tret);
	413	if (err != 0)
	414	exit(1);
	415	tot_reads += count_reader[i];
	416	}
	417	for (i = 0; i < nr_writers; i++) {
	418	err = pthread_join(tid_writer[i], &tret);
	419	if (err != 0)
	420	exit(1);
	421	tot_writes += tot_nr_writes[i];
	422	}
	423
	424	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	425	tot_writes);
a50a7b43	426	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
90075a50 MD	427	"nr_writers %3u "
90075a50 MD	428	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	429	argv[0], duration, nr_readers, rduration, wduration,
90075a50 MD	430	nr_writers, wdelay, tot_reads, tot_writes,
	431	tot_reads + tot_writes);
	432	free(tid_reader);
	433	free(tid_writer);
	434	free(count_reader);
	435	free(tot_nr_writes);
	436
	437	return 0;
	438	}