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

/*
 * test_urcu.c
 *
 * Userspace RCU library - test program
 *
 * 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 <errno.h>

#include <urcu/arch.h>
#include <urcu/tls-compat.h>
#include "cpuset.h"
#include "thread-id.h"
#include "../common/debug-yield.h"

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

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

static volatile int test_go, test_stop;

static unsigned long wdelay;

static int *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;

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 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;
	int *local_ptr;

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

	set_affinity();

	rcu_register_thread();
	assert(!rcu_read_ongoing());

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		rcu_read_lock();
		assert(rcu_read_ongoing());
		local_ptr = rcu_dereference(test_rcu_pointer);
		rcu_debug_yield_read();
		if (local_ptr)
			assert(*local_ptr == 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, tid %lu\n",
			"reader", urcu_get_thread_id());
	return ((void*)1);

}

void *thr_writer(void *_count)
{
	unsigned long long *count = _count;
	int *new, *old;

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

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		new = malloc(sizeof(int));
		*new = 8;
		old = rcu_xchg_pointer(&test_rcu_pointer, new);
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		synchronize_rcu();
		if (old)
			*old = 0;
		free(old);
		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());
	*count = URCU_TLS(nr_writes);
	return ((void*)2);
}

void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
		argv[0]);
	printf("OPTIONS:\n");
	printf("	[-r] [-w] (yield reader and/or writer)\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 *count_reader, *count_writer;
	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]) {
		case 'r':
			rcu_debug_yield_enable(RCU_YIELD_READ);
			break;
		case 'w':
			rcu_debug_yield_enable(RCU_YIELD_WRITE);
			break;
		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, tid %lu\n",
			"main", urcu_get_thread_id());

	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	count_reader = calloc(nr_readers, sizeof(*count_reader));
	count_writer = calloc(nr_writers, sizeof(*count_writer));

	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,
				     &count_writer[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 += count_writer[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(test_rcu_pointer);
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
	return 0;
}
Commit	Line	Data
fdee2e6d MD	1	/*
	2	* test_urcu.c
	3	*
	4	* Userspace RCU library - test program
	5	*
6982d6d7	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
fdee2e6d 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
f5ab766e	24	#include "config.h"
fdee2e6d 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>
94b343fd	34	#include <errno.h>
fdee2e6d MD	35
fdee2e6d MD	36	#include <urcu/arch.h>
bd252a04	37	#include <urcu/tls-compat.h>
2953b501	38	#include "cpuset.h"
94df6318	39	#include "thread-id.h"
2650042a	40	#include "../common/debug-yield.h"
65fcc7e9	41
fdee2e6d MD	42	/* hardcoded number of CPUs */
	43	#define NR_CPUS 16384
	44
fdee2e6d MD	45	#ifndef DYNAMIC_LINK_TEST
fdee2e6d MD	46	#define _LGPL_SOURCE
fdee2e6d MD	47	#endif
	48	#include <urcu-bp.h>
	49
fdee2e6d MD	50	static volatile int test_go, test_stop;
	51
	52	static unsigned long wdelay;
	53
bcc74df3	54	static int *test_rcu_pointer;
fdee2e6d MD	55
	56	static unsigned long duration;
	57
	58	/* read-side C.S. duration, in loops */
	59	static unsigned long rduration;
	60
31b598e0 MD	61	/* write-side C.S. duration, in loops */
	62	static unsigned long wduration;
	63
ab0aacbe	64	static inline void loop_sleep(unsigned long loops)
fdee2e6d	65	{
ab0aacbe	66	while (loops-- != 0)
06f22bdb	67	caa_cpu_relax();
fdee2e6d MD	68	}
	69
	70	static int verbose_mode;
	71
	72	#define printf_verbose(fmt, args...) \
	73	do { \
	74	if (verbose_mode) \
	75	printf(fmt, args); \
	76	} while (0)
	77
	78	static unsigned int cpu_affinities[NR_CPUS];
	79	static unsigned int next_aff = 0;
	80	static int use_affinity = 0;
	81
	82	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	83
	84	static void set_affinity(void)
	85	{
95bc7fb9	86	#if HAVE_SCHED_SETAFFINITY
fdee2e6d	87	cpu_set_t mask;
95bc7fb9 MD	88	int cpu, ret;
95bc7fb9 MD	89	#endif /* HAVE_SCHED_SETAFFINITY */
fdee2e6d MD	90
	91	if (!use_affinity)
	92	return;
	93
d8540fc5	94	#if HAVE_SCHED_SETAFFINITY
fdee2e6d MD	95	ret = pthread_mutex_lock(&affinity_mutex);
	96	if (ret) {
	97	perror("Error in pthread mutex lock");
	98	exit(-1);
	99	}
	100	cpu = cpu_affinities[next_aff++];
	101	ret = pthread_mutex_unlock(&affinity_mutex);
	102	if (ret) {
	103	perror("Error in pthread mutex unlock");
	104	exit(-1);
	105	}
d8540fc5	106
fdee2e6d MD	107	CPU_ZERO(&mask);
fdee2e6d MD	108	CPU_SET(cpu, &mask);
d8540fc5 PA	109	#if SCHED_SETAFFINITY_ARGS == 2
	110	sched_setaffinity(0, &mask);
	111	#else
fdee2e6d	112	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	113	#endif
d8540fc5 PA	114	#endif /* HAVE_SCHED_SETAFFINITY */
fdee2e6d MD	115	}
	116
	117	/*
	118	* returns 0 if test should end.
	119	*/
	120	static int test_duration_write(void)
	121	{
	122	return !test_stop;
	123	}
	124
	125	static int test_duration_read(void)
	126	{
	127	return !test_stop;
	128	}
	129
bd252a04 MD	130	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	131	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
fdee2e6d MD	132
	133	static unsigned int nr_readers;
	134	static unsigned int nr_writers;
	135
	136	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	137
	138	void rcu_copy_mutex_lock(void)
	139	{
	140	int ret;
	141	ret = pthread_mutex_lock(&rcu_copy_mutex);
	142	if (ret) {
	143	perror("Error in pthread mutex lock");
	144	exit(-1);
	145	}
	146	}
	147
	148	void rcu_copy_mutex_unlock(void)
	149	{
	150	int ret;
	151
	152	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	153	if (ret) {
	154	perror("Error in pthread mutex unlock");
	155	exit(-1);
	156	}
	157	}
	158
fdee2e6d MD	159	void thr_reader(void _count)
	160	{
	161	unsigned long long *count = _count;
bcc74df3	162	int *local_ptr;
fdee2e6d	163
94df6318 MD	164	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	165	"reader", urcu_get_thread_id());
fdee2e6d MD	166
	167	set_affinity();
	168
	169	rcu_register_thread();
882f3357	170	assert(!rcu_read_ongoing());
fdee2e6d MD	171
	172	while (!test_go)
	173	{
	174	}
5481ddb3	175	cmm_smp_mb();
fdee2e6d MD	176
	177	for (;;) {
	178	rcu_read_lock();
882f3357	179	assert(rcu_read_ongoing());
fdee2e6d	180	local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b	181	rcu_debug_yield_read();
fdee2e6d	182	if (local_ptr)
bcc74df3	183	assert(*local_ptr == 8);
a0b7f7ea	184	if (caa_unlikely(rduration))
fdee2e6d MD	185	loop_sleep(rduration);
fdee2e6d MD	186	rcu_read_unlock();
bd252a04	187	URCU_TLS(nr_reads)++;
a0b7f7ea	188	if (caa_unlikely(!test_duration_read()))
fdee2e6d MD	189	break;
	190	}
	191
	192	rcu_unregister_thread();
	193
bd252a04	194	*count = URCU_TLS(nr_reads);
94df6318 MD	195	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	196	"reader", urcu_get_thread_id());
fdee2e6d MD	197	return ((void*)1);
	198
	199	}
	200
	201	void thr_writer(void _count)
	202	{
	203	unsigned long long *count = _count;
bcc74df3	204	int new, old;
fdee2e6d	205
94df6318 MD	206	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	207	"writer", urcu_get_thread_id());
fdee2e6d MD	208
	209	set_affinity();
	210
	211	while (!test_go)
	212	{
	213	}
5481ddb3	214	cmm_smp_mb();
fdee2e6d MD	215
fdee2e6d MD	216	for (;;) {
bcc74df3 MD	217	new = malloc(sizeof(int));
bcc74df3 MD	218	*new = 8;
d2835e6f	219	old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea	220	if (caa_unlikely(wduration))
31b598e0	221	loop_sleep(wduration);
d2835e6f	222	synchronize_rcu();
fdee2e6d	223	if (old)
bcc74df3 MD	224	*old = 0;
bcc74df3 MD	225	free(old);
bd252a04	226	URCU_TLS(nr_writes)++;
a0b7f7ea	227	if (caa_unlikely(!test_duration_write()))
fdee2e6d	228	break;
a0b7f7ea	229	if (caa_unlikely(wdelay))
fdee2e6d MD	230	loop_sleep(wdelay);
	231	}
	232
94df6318 MD	233	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	234	"writer", urcu_get_thread_id());
bd252a04	235	*count = URCU_TLS(nr_writes);
fdee2e6d MD	236	return ((void*)2);
	237	}
	238
	239	void show_usage(int argc, char **argv)
	240	{
06637138 MD	241	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	242	argv[0]);
	243	printf("OPTIONS:\n");
06637138	244	printf(" [-r] [-w] (yield reader and/or writer)\n");
06637138 MD	245	printf(" [-d delay] (writer period (us))\n");
	246	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	247	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	248	printf(" [-v] (verbose output)\n");
	249	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
fdee2e6d MD	250	printf("\n");
	251	}
	252
	253	int main(int argc, char **argv)
	254	{
	255	int err;
	256	pthread_t tid_reader, tid_writer;
	257	void *tret;
	258	unsigned long long count_reader, count_writer;
	259	unsigned long long tot_reads = 0, tot_writes = 0;
	260	int i, a;
	261
	262	if (argc < 4) {
	263	show_usage(argc, argv);
	264	return -1;
	265	}
	266
	267	err = sscanf(argv[1], "%u", &nr_readers);
	268	if (err != 1) {
	269	show_usage(argc, argv);
	270	return -1;
	271	}
	272
	273	err = sscanf(argv[2], "%u", &nr_writers);
	274	if (err != 1) {
	275	show_usage(argc, argv);
	276	return -1;
	277	}
	278
	279	err = sscanf(argv[3], "%lu", &duration);
	280	if (err != 1) {
	281	show_usage(argc, argv);
	282	return -1;
	283	}
	284
	285	for (i = 4; i < argc; i++) {
	286	if (argv[i][0] != '-')
	287	continue;
	288	switch (argv[i][1]) {
fdee2e6d	289	case 'r':
2650042a	290	rcu_debug_yield_enable(RCU_YIELD_READ);
fdee2e6d MD	291	break;
fdee2e6d MD	292	case 'w':
2650042a	293	rcu_debug_yield_enable(RCU_YIELD_WRITE);
fdee2e6d	294	break;
fdee2e6d MD	295	case 'a':
	296	if (argc < i + 2) {
	297	show_usage(argc, argv);
	298	return -1;
	299	}
	300	a = atoi(argv[++i]);
	301	cpu_affinities[next_aff++] = a;
	302	use_affinity = 1;
	303	printf_verbose("Adding CPU %d affinity\n", a);
	304	break;
	305	case 'c':
	306	if (argc < i + 2) {
	307	show_usage(argc, argv);
	308	return -1;
	309	}
	310	rduration = atol(argv[++i]);
	311	break;
	312	case 'd':
	313	if (argc < i + 2) {
	314	show_usage(argc, argv);
	315	return -1;
	316	}
	317	wdelay = atol(argv[++i]);
	318	break;
31b598e0 MD	319	case 'e':
	320	if (argc < i + 2) {
	321	show_usage(argc, argv);
	322	return -1;
	323	}
	324	wduration = atol(argv[++i]);
	325	break;
fdee2e6d MD	326	case 'v':
	327	verbose_mode = 1;
	328	break;
	329	}
	330	}
	331
	332	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	333	duration, nr_readers, nr_writers);
	334	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	335	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	336	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	337	"main", urcu_get_thread_id());
fdee2e6d	338
9aa14175 MD	339	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	340	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	341	count_reader = calloc(nr_readers, sizeof(*count_reader));
	342	count_writer = calloc(nr_writers, sizeof(*count_writer));
fdee2e6d MD	343
	344	next_aff = 0;
	345
	346	for (i = 0; i < nr_readers; i++) {
	347	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	348	&count_reader[i]);
	349	if (err != 0)
	350	exit(1);
	351	}
	352	for (i = 0; i < nr_writers; i++) {
	353	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	354	&count_writer[i]);
	355	if (err != 0)
	356	exit(1);
	357	}
	358
5481ddb3	359	cmm_smp_mb();
fdee2e6d MD	360
	361	test_go = 1;
	362
	363	sleep(duration);
	364
	365	test_stop = 1;
	366
	367	for (i = 0; i < nr_readers; i++) {
	368	err = pthread_join(tid_reader[i], &tret);
	369	if (err != 0)
	370	exit(1);
	371	tot_reads += count_reader[i];
	372	}
	373	for (i = 0; i < nr_writers; i++) {
	374	err = pthread_join(tid_writer[i], &tret);
	375	if (err != 0)
	376	exit(1);
	377	tot_writes += count_writer[i];
	378	}
	379
	380	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	381	tot_writes);
a50a7b43	382	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
fdee2e6d MD	383	"nr_writers %3u "
fdee2e6d MD	384	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	385	argv[0], duration, nr_readers, rduration, wduration,
fdee2e6d MD	386	nr_writers, wdelay, tot_reads, tot_writes,
fdee2e6d MD	387	tot_reads + tot_writes);
bcc74df3	388	free(test_rcu_pointer);
fdee2e6d MD	389	free(tid_reader);
	390	free(tid_writer);
	391	free(count_reader);
	392	free(count_writer);
	393	return 0;
	394	}