[urcu.git] / tests / benchmark / test_perthreadlock.c

// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later

/*
 * Userspace RCU library - test program
 */

#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 <errno.h>

#include <urcu/arch.h>
#include <urcu/assert.h>
#include <urcu/tls-compat.h>
#include "thread-id.h"

/* hardcoded number of CPUs */
#define NR_CPUS 16384

#ifndef DYNAMIC_LINK_TEST
#define _LGPL_SOURCE
#endif
#include <urcu.h>

struct test_array {
	int a;
};

struct per_thread_lock {
	pthread_mutex_t lock;
} __attribute__((aligned(CAA_CACHE_LINE_SIZE)));	/* cache-line aligned */

static struct per_thread_lock *per_thread_lock;

static volatile int test_go, test_stop;

static unsigned long wdelay;

static volatile struct test_array test_array = { 8 };

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;

static void set_affinity(void)
{
#ifdef HAVE_SCHED_SETAFFINITY
	cpu_set_t mask;
	int cpu, ret;
#endif /* HAVE_SCHED_SETAFFINITY */

	if (!use_affinity)
		return;

#ifdef HAVE_SCHED_SETAFFINITY
	ret = pthread_mutex_lock(&affinity_mutex);
	if (ret) {
		errno = ret;
		perror("Error in pthread mutex lock");
		abort();
	}
	cpu = cpu_affinities[next_aff++];
	ret = pthread_mutex_unlock(&affinity_mutex);
	if (ret) {
		errno = ret;
		perror("Error in pthread mutex unlock");
		abort();
	}
	CPU_ZERO(&mask);
	CPU_SET(cpu, &mask);
	sched_setaffinity(0, sizeof(mask), &mask);
#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 long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;

static unsigned int nr_readers;
static unsigned int nr_writers;

static void urcu_mutex_lock(pthread_mutex_t *lock)
{
	int ret;

	ret = pthread_mutex_lock(lock);
	if (ret) {
		errno = ret;
		perror("Error in pthread mutex lock");
		abort();
	}
}

static void urcu_mutex_unlock(pthread_mutex_t *lock)
{
	int ret;

	ret = pthread_mutex_unlock(lock);
	if (ret) {
		errno = ret;
		perror("Error in pthread mutex unlock");
		abort();
	}
}

static
void *thr_reader(void *data)
{
	unsigned long tidx = (unsigned long)data;

	printf_verbose("thread_begin %s, tid %lu\n",
			"reader", urcu_get_thread_id());

	set_affinity();

	while (!test_go)
	{
	}

	for (;;) {
		int v;

		urcu_mutex_lock(&per_thread_lock[tidx].lock);
		v = test_array.a;
		urcu_posix_assert(v == 8);
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
		urcu_mutex_unlock(&per_thread_lock[tidx].lock);
		URCU_TLS(nr_reads)++;
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	tot_nr_reads[tidx] = URCU_TLS(nr_reads);
	printf_verbose("thread_end %s, tid %lu\n",
			"reader", urcu_get_thread_id());
	return ((void*)1);

}

static
void *thr_writer(void *data)
{
	unsigned long wtidx = (unsigned long)data;
	long tidx;

	printf_verbose("thread_begin %s, tid %lu\n",
			"writer", urcu_get_thread_id());

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		for (tidx = 0; tidx < (long)nr_readers; tidx++) {
			urcu_mutex_lock(&per_thread_lock[tidx].lock);
		}
		test_array.a = 0;
		test_array.a = 8;
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
			urcu_mutex_unlock(&per_thread_lock[tidx].lock);
		}
		URCU_TLS(nr_writes)++;
		if (caa_unlikely(!test_duration_write()))
			break;
		if (caa_unlikely(wdelay))
			loop_sleep(wdelay);
	}

	printf_verbose("thread_end %s, tid %lu\n",
			"writer", urcu_get_thread_id());
	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
	return ((void*)2);
}

static
void show_usage(char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
		argv[0]);
	printf("OPTIONS:\n");
	printf("	[-d delay] (writer period (us))\n");
	printf("	[-c duration] (reader C.S. duration (in loops))\n");
	printf("	[-e duration] (writer C.S. duration (in loops))\n");
	printf("	[-v] (verbose output)\n");
	printf("	[-a cpu#] [-a cpu#]... (affinity)\n");
	printf("\n");
}

int main(int argc, char **argv)
{
	int err;
	pthread_t *tid_reader, *tid_writer;
	void *tret;
	unsigned long long tot_reads = 0, tot_writes = 0;
	int i, a;
	unsigned int i_thr;

	if (argc < 4) {
		show_usage(argv);
		return -1;
	}
	cmm_smp_mb();

	err = sscanf(argv[1], "%u", &nr_readers);
	if (err != 1) {
		show_usage(argv);
		return -1;
	}

	err = sscanf(argv[2], "%u", &nr_writers);
	if (err != 1) {
		show_usage(argv);
		return -1;
	}

	err = sscanf(argv[3], "%lu", &duration);
	if (err != 1) {
		show_usage(argv);
		return -1;
	}

	for (i = 4; i < argc; i++) {
		if (argv[i][0] != '-')
			continue;
		switch (argv[i][1]) {
		case 'a':
			if (argc < i + 2) {
				show_usage(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(argv);
				return -1;
			}
			rduration = atol(argv[++i]);
			break;
		case 'd':
			if (argc < i + 2) {
				show_usage(argv);
				return -1;
			}
			wdelay = atol(argv[++i]);
			break;
		case 'e':
			if (argc < i + 2) {
				show_usage(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, tid %lu\n",
			"main", urcu_get_thread_id());

	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads));
	tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
	per_thread_lock = calloc(nr_readers, sizeof(*per_thread_lock));
	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
		pthread_mutex_init(&per_thread_lock[i_thr].lock, NULL);
	}

	next_aff = 0;

	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
		err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
				     (void *)(long)i_thr);
		if (err != 0)
			exit(1);
	}
	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
		err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
				     (void *)(long)i_thr);
		if (err != 0)
			exit(1);
	}

	cmm_smp_mb();

	test_go = 1;

	sleep(duration);

	test_stop = 1;

	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
		err = pthread_join(tid_reader[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_reads += tot_nr_reads[i_thr];
	}
	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
		err = pthread_join(tid_writer[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_writes += tot_nr_writes[i_thr];
	}

	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(tot_nr_reads);
	free(tot_nr_writes);
	free(per_thread_lock);
	return 0;
}
Commit	Line	Data
ce29b371 MJ	1	// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	2	//
	3	// SPDX-License-Identifier: GPL-2.0-or-later
	4
0ee8bb0a	5	/*
0ee8bb0a	6	* Userspace RCU library - test program
0ee8bb0a MD	7	*/
	8
	9	#include <stdio.h>
	10	#include <pthread.h>
	11	#include <stdlib.h>
	12	#include <string.h>
	13	#include <sys/types.h>
	14	#include <sys/wait.h>
	15	#include <unistd.h>
	16	#include <stdio.h>
94b343fd	17	#include <errno.h>
0ee8bb0a	18
ec4e58a3	19	#include <urcu/arch.h>
01477510	20	#include <urcu/assert.h>
bd252a04	21	#include <urcu/tls-compat.h>
94df6318	22	#include "thread-id.h"
65fcc7e9	23
2a7ac59d MD	24	/* hardcoded number of CPUs */
	25	#define NR_CPUS 16384
	26
0ee8bb0a MD	27	#ifndef DYNAMIC_LINK_TEST
0ee8bb0a MD	28	#define _LGPL_SOURCE
0ee8bb0a	29	#endif
ec4e58a3	30	#include <urcu.h>
0ee8bb0a MD	31
	32	struct test_array {
	33	int a;
	34	};
	35
	36	struct per_thread_lock {
	37	pthread_mutex_t lock;
06f22bdb	38	} __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
0ee8bb0a MD	39
	40	static struct per_thread_lock *per_thread_lock;
	41
78efb485	42	static volatile int test_go, test_stop;
0ee8bb0a	43
9e31d0f0	44	static unsigned long wdelay;
0ee8bb0a	45
2b4e4125	46	static volatile struct test_array test_array = { 8 };
0ee8bb0a MD	47
0ee8bb0a MD	48	static unsigned long duration;
0ee8bb0a	49
daddf5b0	50	/* read-side C.S. duration, in loops */
8b632bab MD	51	static unsigned long rduration;
8b632bab MD	52
31b598e0 MD	53	/* write-side C.S. duration, in loops */
	54	static unsigned long wduration;
	55
ab0aacbe	56	static inline void loop_sleep(unsigned long loops)
daddf5b0	57	{
ab0aacbe	58	while (loops-- != 0)
06f22bdb	59	caa_cpu_relax();
daddf5b0 MD	60	}
daddf5b0 MD	61
4bad7d45 MD	62	static int verbose_mode;
	63
	64	#define printf_verbose(fmt, args...) \
	65	do { \
	66	if (verbose_mode) \
	67	printf(fmt, args); \
	68	} while (0)
	69
2a7ac59d MD	70	static unsigned int cpu_affinities[NR_CPUS];
	71	static unsigned int next_aff = 0;
	72	static int use_affinity = 0;
	73
6af882ba MD	74	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	75
2a7ac59d MD	76	static void set_affinity(void)
2a7ac59d MD	77	{
2388c075	78	#ifdef HAVE_SCHED_SETAFFINITY
2a7ac59d	79	cpu_set_t mask;
95bc7fb9 MD	80	int cpu, ret;
95bc7fb9 MD	81	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	82
	83	if (!use_affinity)
	84	return;
	85
2388c075	86	#ifdef HAVE_SCHED_SETAFFINITY
6af882ba MD	87	ret = pthread_mutex_lock(&affinity_mutex);
6af882ba MD	88	if (ret) {
f597a8b9	89	errno = ret;
6af882ba	90	perror("Error in pthread mutex lock");
f597a8b9	91	abort();
6af882ba	92	}
2a7ac59d	93	cpu = cpu_affinities[next_aff++];
6af882ba MD	94	ret = pthread_mutex_unlock(&affinity_mutex);
6af882ba MD	95	if (ret) {
f597a8b9	96	errno = ret;
6af882ba	97	perror("Error in pthread mutex unlock");
f597a8b9	98	abort();
6af882ba	99	}
2a7ac59d MD	100	CPU_ZERO(&mask);
	101	CPU_SET(cpu, &mask);
	102	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5	103	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	104	}
2a7ac59d MD	105
0ee8bb0a MD	106	/*
	107	* returns 0 if test should end.
	108	*/
	109	static int test_duration_write(void)
	110	{
78efb485	111	return !test_stop;
0ee8bb0a MD	112	}
	113
	114	static int test_duration_read(void)
	115	{
78efb485	116	return !test_stop;
0ee8bb0a MD	117	}
0ee8bb0a MD	118
bd252a04 MD	119	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	120	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
0ee8bb0a	121
55271c13	122	static
06f22bdb	123	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13	124	static
06f22bdb	125	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;
0ee8bb0a MD	126
	127	static unsigned int nr_readers;
	128	static unsigned int nr_writers;
	129
f597a8b9	130	static void urcu_mutex_lock(pthread_mutex_t *lock)
0ee8bb0a MD	131	{
0ee8bb0a MD	132	int ret;
f597a8b9 MD	133
f597a8b9 MD	134	ret = pthread_mutex_lock(lock);
0ee8bb0a	135	if (ret) {
f597a8b9	136	errno = ret;
0ee8bb0a	137	perror("Error in pthread mutex lock");
f597a8b9	138	abort();
0ee8bb0a MD	139	}
	140	}
	141
f597a8b9	142	static void urcu_mutex_unlock(pthread_mutex_t *lock)
0ee8bb0a MD	143	{
	144	int ret;
	145
f597a8b9	146	ret = pthread_mutex_unlock(lock);
0ee8bb0a	147	if (ret) {
f597a8b9	148	errno = ret;
0ee8bb0a	149	perror("Error in pthread mutex unlock");
f597a8b9	150	abort();
0ee8bb0a MD	151	}
	152	}
	153
61c3fb60	154	static
0ee8bb0a MD	155	void thr_reader(void data)
	156	{
	157	unsigned long tidx = (unsigned long)data;
	158
94df6318 MD	159	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	160	"reader", urcu_get_thread_id());
0ee8bb0a	161
2a7ac59d MD	162	set_affinity();
2a7ac59d MD	163
0ee8bb0a MD	164	while (!test_go)
	165	{
	166	}
	167
	168	for (;;) {
19d0e7ef MD	169	int v;
19d0e7ef MD	170
f597a8b9	171	urcu_mutex_lock(&per_thread_lock[tidx].lock);
19d0e7ef	172	v = test_array.a;
01477510	173	urcu_posix_assert(v == 8);
a0b7f7ea	174	if (caa_unlikely(rduration))
daddf5b0	175	loop_sleep(rduration);
f597a8b9	176	urcu_mutex_unlock(&per_thread_lock[tidx].lock);
bd252a04	177	URCU_TLS(nr_reads)++;
a0b7f7ea	178	if (caa_unlikely(!test_duration_read()))
0ee8bb0a MD	179	break;
	180	}
	181
bd252a04	182	tot_nr_reads[tidx] = URCU_TLS(nr_reads);
94df6318 MD	183	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	184	"reader", urcu_get_thread_id());
0ee8bb0a MD	185	return ((void*)1);
	186
	187	}
	188
61c3fb60	189	static
0ee8bb0a MD	190	void thr_writer(void data)
	191	{
	192	unsigned long wtidx = (unsigned long)data;
	193	long tidx;
	194
94df6318 MD	195	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	196	"writer", urcu_get_thread_id());
0ee8bb0a	197
2a7ac59d MD	198	set_affinity();
2a7ac59d MD	199
0ee8bb0a MD	200	while (!test_go)
	201	{
	202	}
5481ddb3	203	cmm_smp_mb();
0ee8bb0a MD	204
0ee8bb0a MD	205	for (;;) {
d266df35	206	for (tidx = 0; tidx < (long)nr_readers; tidx++) {
f597a8b9	207	urcu_mutex_lock(&per_thread_lock[tidx].lock);
0ee8bb0a	208	}
2b4e4125	209	test_array.a = 0;
0ee8bb0a	210	test_array.a = 8;
a0b7f7ea	211	if (caa_unlikely(wduration))
31b598e0	212	loop_sleep(wduration);
f120cc10	213	for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
f597a8b9	214	urcu_mutex_unlock(&per_thread_lock[tidx].lock);
0ee8bb0a	215	}
bd252a04	216	URCU_TLS(nr_writes)++;
a0b7f7ea	217	if (caa_unlikely(!test_duration_write()))
0ee8bb0a	218	break;
a0b7f7ea	219	if (caa_unlikely(wdelay))
9e31d0f0	220	loop_sleep(wdelay);
0ee8bb0a MD	221	}
0ee8bb0a MD	222
94df6318 MD	223	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	224	"writer", urcu_get_thread_id());
bd252a04	225	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
0ee8bb0a MD	226	return ((void*)2);
	227	}
	228
61c3fb60	229	static
70469b43	230	void show_usage(char **argv)
0ee8bb0a	231	{
06637138 MD	232	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	233	argv[0]);
	234	printf("OPTIONS:\n");
06637138 MD	235	printf(" [-d delay] (writer period (us))\n");
	236	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	237	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	238	printf(" [-v] (verbose output)\n");
	239	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
0ee8bb0a MD	240	printf("\n");
	241	}
	242
	243	int main(int argc, char **argv)
	244	{
	245	int err;
	246	pthread_t tid_reader, tid_writer;
	247	void *tret;
0ee8bb0a	248	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	249	int i, a;
83e334d0	250	unsigned int i_thr;
0ee8bb0a MD	251
0ee8bb0a MD	252	if (argc < 4) {
70469b43	253	show_usage(argv);
0ee8bb0a MD	254	return -1;
0ee8bb0a MD	255	}
5481ddb3	256	cmm_smp_mb();
0ee8bb0a MD	257
	258	err = sscanf(argv[1], "%u", &nr_readers);
	259	if (err != 1) {
70469b43	260	show_usage(argv);
0ee8bb0a MD	261	return -1;
	262	}
	263
	264	err = sscanf(argv[2], "%u", &nr_writers);
	265	if (err != 1) {
70469b43	266	show_usage(argv);
0ee8bb0a MD	267	return -1;
0ee8bb0a MD	268	}
83e334d0	269
0ee8bb0a MD	270	err = sscanf(argv[3], "%lu", &duration);
0ee8bb0a MD	271	if (err != 1) {
70469b43	272	show_usage(argv);
0ee8bb0a MD	273	return -1;
	274	}
	275
	276	for (i = 4; i < argc; i++) {
	277	if (argv[i][0] != '-')
	278	continue;
	279	switch (argv[i][1]) {
9e97e478 MD	280	case 'a':
9e97e478 MD	281	if (argc < i + 2) {
70469b43	282	show_usage(argv);
9e97e478 MD	283	return -1;
	284	}
	285	a = atoi(argv[++i]);
2a7ac59d	286	cpu_affinities[next_aff++] = a;
9e97e478	287	use_affinity = 1;
4bad7d45	288	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	289	break;
8b632bab MD	290	case 'c':
8b632bab MD	291	if (argc < i + 2) {
70469b43	292	show_usage(argv);
8b632bab MD	293	return -1;
8b632bab MD	294	}
9e31d0f0	295	rduration = atol(argv[++i]);
8b632bab	296	break;
0ee8bb0a MD	297	case 'd':
0ee8bb0a MD	298	if (argc < i + 2) {
70469b43	299	show_usage(argv);
0ee8bb0a MD	300	return -1;
0ee8bb0a MD	301	}
9e31d0f0	302	wdelay = atol(argv[++i]);
0ee8bb0a	303	break;
31b598e0 MD	304	case 'e':
31b598e0 MD	305	if (argc < i + 2) {
70469b43	306	show_usage(argv);
31b598e0 MD	307	return -1;
	308	}
	309	wduration = atol(argv[++i]);
	310	break;
4bad7d45 MD	311	case 'v':
	312	verbose_mode = 1;
	313	break;
0ee8bb0a MD	314	}
	315	}
	316
4bad7d45	317	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a	318	duration, nr_readers, nr_writers);
9e31d0f0	319	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45	320	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	321	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	322	"main", urcu_get_thread_id());
0ee8bb0a	323
9aa14175 MD	324	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	325	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	326	tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads));
	327	tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
	328	per_thread_lock = calloc(nr_readers, sizeof(*per_thread_lock));
83e334d0 MJ	329	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
83e334d0 MJ	330	pthread_mutex_init(&per_thread_lock[i_thr].lock, NULL);
dee09338	331	}
0ee8bb0a	332
2a7ac59d MD	333	next_aff = 0;
2a7ac59d MD	334
83e334d0 MJ	335	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
	336	err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
	337	(void *)(long)i_thr);
0ee8bb0a MD	338	if (err != 0)
	339	exit(1);
	340	}
83e334d0 MJ	341	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
	342	err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
	343	(void *)(long)i_thr);
0ee8bb0a MD	344	if (err != 0)
	345	exit(1);
	346	}
	347
5481ddb3	348	cmm_smp_mb();
0ee8bb0a	349
78efb485 MD	350	test_go = 1;
	351
	352	sleep(duration);
	353
	354	test_stop = 1;
	355
83e334d0 MJ	356	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
83e334d0 MJ	357	err = pthread_join(tid_reader[i_thr], &tret);
0ee8bb0a MD	358	if (err != 0)
0ee8bb0a MD	359	exit(1);
83e334d0	360	tot_reads += tot_nr_reads[i_thr];
0ee8bb0a	361	}
83e334d0 MJ	362	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
83e334d0 MJ	363	err = pthread_join(tid_writer[i_thr], &tret);
0ee8bb0a MD	364	if (err != 0)
0ee8bb0a MD	365	exit(1);
83e334d0	366	tot_writes += tot_nr_writes[i_thr];
0ee8bb0a	367	}
4bad7d45 MD	368
4bad7d45 MD	369	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a	370	tot_writes);
a50a7b43	371	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	372	"nr_writers %3u "
9e31d0f0	373	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	374	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	375	nr_writers, wdelay, tot_reads, tot_writes,
	376	tot_reads + tot_writes);
	377
0ee8bb0a MD	378	free(tid_reader);
0ee8bb0a MD	379	free(tid_writer);
0ee8bb0a MD	380	free(tot_nr_reads);
	381	free(tot_nr_writes);
	382	free(per_thread_lock);
	383	return 0;
	384	}