[urcu.git] / tests / benchmark / test_urcu_qsbr.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-qsbr.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());
	rcu_thread_offline();
	assert(!rcu_read_ongoing());
	rcu_thread_online();

	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)++;
		/* QS each 1024 reads */
		if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
			rcu_quiescent_state();
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	rcu_unregister_thread();

	/* test extra thread registration */
	rcu_register_thread();
	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));
		assert(new);
		*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
de10a585 MD	1	/*
	2	* test_urcu.c
	3	*
	4	* Userspace RCU library - test program
	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
f5ab766e	24	#include "config.h"
de10a585 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>
de10a585 MD	34	#include <errno.h>
	35
	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"
de10a585 MD	41
	42	/* hardcoded number of CPUs */
	43	#define NR_CPUS 16384
	44
de10a585 MD	45	#ifndef DYNAMIC_LINK_TEST
de10a585 MD	46	#define _LGPL_SOURCE
de10a585 MD	47	#endif
	48	#include "urcu-qsbr.h"
	49
de10a585 MD	50	static volatile int test_go, test_stop;
	51
	52	static unsigned long wdelay;
	53
bcc74df3	54	static int *test_rcu_pointer;
de10a585 MD	55
	56	static unsigned long duration;
	57
	58	/* read-side C.S. duration, in loops */
	59	static unsigned long rduration;
	60
	61	/* write-side C.S. duration, in loops */
	62	static unsigned long wduration;
	63
ab0aacbe	64	static inline void loop_sleep(unsigned long loops)
de10a585	65	{
ab0aacbe	66	while (loops-- != 0)
de10a585 MD	67	caa_cpu_relax();
	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
de10a585 MD	84	static void set_affinity(void)
de10a585 MD	85	{
95bc7fb9	86	#if HAVE_SCHED_SETAFFINITY
de10a585	87	cpu_set_t mask;
95bc7fb9 MD	88	int cpu, ret;
95bc7fb9 MD	89	#endif /* HAVE_SCHED_SETAFFINITY */
de10a585 MD	90
	91	if (!use_affinity)
	92	return;
	93
	94	#if HAVE_SCHED_SETAFFINITY
	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	}
	106	CPU_ZERO(&mask);
	107	CPU_SET(cpu, &mask);
	108	#if SCHED_SETAFFINITY_ARGS == 2
	109	sched_setaffinity(0, &mask);
	110	#else
	111	sched_setaffinity(0, sizeof(mask), &mask);
	112	#endif
	113	#endif /* HAVE_SCHED_SETAFFINITY */
	114	}
	115
	116	/*
	117	* returns 0 if test should end.
	118	*/
	119	static int test_duration_write(void)
	120	{
	121	return !test_stop;
	122	}
	123
	124	static int test_duration_read(void)
	125	{
	126	return !test_stop;
	127	}
	128
bd252a04 MD	129	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	130	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
de10a585 MD	131
	132	static unsigned int nr_readers;
	133	static unsigned int nr_writers;
	134
	135	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	136
	137	void rcu_copy_mutex_lock(void)
	138	{
	139	int ret;
	140	ret = pthread_mutex_lock(&rcu_copy_mutex);
	141	if (ret) {
	142	perror("Error in pthread mutex lock");
	143	exit(-1);
	144	}
	145	}
	146
	147	void rcu_copy_mutex_unlock(void)
	148	{
	149	int ret;
	150
	151	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	152	if (ret) {
	153	perror("Error in pthread mutex unlock");
	154	exit(-1);
	155	}
	156	}
	157
de10a585 MD	158	void thr_reader(void _count)
	159	{
	160	unsigned long long *count = _count;
bcc74df3	161	int *local_ptr;
de10a585	162
94df6318 MD	163	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	164	"reader", urcu_get_thread_id());
de10a585 MD	165
	166	set_affinity();
	167
	168	rcu_register_thread();
	169
882f3357 MD	170	assert(rcu_read_ongoing());
	171	rcu_thread_offline();
	172	assert(!rcu_read_ongoing());
	173	rcu_thread_online();
	174
de10a585 MD	175	while (!test_go)
	176	{
	177	}
	178	cmm_smp_mb();
	179
	180	for (;;) {
	181	rcu_read_lock();
882f3357	182	assert(rcu_read_ongoing());
de10a585	183	local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b	184	rcu_debug_yield_read();
de10a585	185	if (local_ptr)
bcc74df3	186	assert(*local_ptr == 8);
a0b7f7ea	187	if (caa_unlikely(rduration))
de10a585 MD	188	loop_sleep(rduration);
de10a585 MD	189	rcu_read_unlock();
bd252a04	190	URCU_TLS(nr_reads)++;
de10a585	191	/* QS each 1024 reads */
bd252a04	192	if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
de10a585	193	rcu_quiescent_state();
a0b7f7ea	194	if (caa_unlikely(!test_duration_read()))
de10a585 MD	195	break;
	196	}
	197
	198	rcu_unregister_thread();
	199
	200	/* test extra thread registration */
	201	rcu_register_thread();
	202	rcu_unregister_thread();
	203
bd252a04	204	*count = URCU_TLS(nr_reads);
94df6318 MD	205	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	206	"reader", urcu_get_thread_id());
de10a585 MD	207	return ((void*)1);
	208
	209	}
	210
	211	void thr_writer(void _count)
	212	{
	213	unsigned long long *count = _count;
bcc74df3	214	int new, old;
de10a585	215
94df6318 MD	216	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	217	"writer", urcu_get_thread_id());
de10a585 MD	218
	219	set_affinity();
	220
	221	while (!test_go)
	222	{
	223	}
	224	cmm_smp_mb();
	225
	226	for (;;) {
bcc74df3 MD	227	new = malloc(sizeof(int));
	228	assert(new);
	229	*new = 8;
de10a585	230	old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea	231	if (caa_unlikely(wduration))
de10a585 MD	232	loop_sleep(wduration);
de10a585 MD	233	synchronize_rcu();
de10a585	234	if (old)
bcc74df3 MD	235	*old = 0;
bcc74df3 MD	236	free(old);
bd252a04	237	URCU_TLS(nr_writes)++;
a0b7f7ea	238	if (caa_unlikely(!test_duration_write()))
de10a585	239	break;
a0b7f7ea	240	if (caa_unlikely(wdelay))
de10a585 MD	241	loop_sleep(wdelay);
	242	}
	243
94df6318 MD	244	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	245	"writer", urcu_get_thread_id());
bd252a04	246	*count = URCU_TLS(nr_writes);
de10a585 MD	247	return ((void*)2);
	248	}
	249
	250	void show_usage(int argc, char **argv)
	251	{
06637138 MD	252	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	253	argv[0]);
	254	printf("OPTIONS:\n");
06637138	255	printf(" [-r] [-w] (yield reader and/or writer)\n");
06637138 MD	256	printf(" [-d delay] (writer period (us))\n");
	257	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	258	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	259	printf(" [-v] (verbose output)\n");
	260	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
de10a585 MD	261	printf("\n");
	262	}
	263
	264	int main(int argc, char **argv)
	265	{
	266	int err;
	267	pthread_t tid_reader, tid_writer;
	268	void *tret;
	269	unsigned long long count_reader, count_writer;
	270	unsigned long long tot_reads = 0, tot_writes = 0;
	271	int i, a;
	272
	273	if (argc < 4) {
	274	show_usage(argc, argv);
	275	return -1;
	276	}
	277
	278	err = sscanf(argv[1], "%u", &nr_readers);
	279	if (err != 1) {
	280	show_usage(argc, argv);
	281	return -1;
	282	}
	283
	284	err = sscanf(argv[2], "%u", &nr_writers);
	285	if (err != 1) {
	286	show_usage(argc, argv);
	287	return -1;
	288	}
	289
	290	err = sscanf(argv[3], "%lu", &duration);
	291	if (err != 1) {
	292	show_usage(argc, argv);
	293	return -1;
	294	}
	295
	296	for (i = 4; i < argc; i++) {
	297	if (argv[i][0] != '-')
	298	continue;
	299	switch (argv[i][1]) {
de10a585	300	case 'r':
2650042a	301	rcu_debug_yield_enable(RCU_YIELD_READ);
de10a585 MD	302	break;
de10a585 MD	303	case 'w':
2650042a	304	rcu_debug_yield_enable(RCU_YIELD_WRITE);
de10a585	305	break;
de10a585 MD	306	case 'a':
	307	if (argc < i + 2) {
	308	show_usage(argc, argv);
	309	return -1;
	310	}
	311	a = atoi(argv[++i]);
	312	cpu_affinities[next_aff++] = a;
	313	use_affinity = 1;
	314	printf_verbose("Adding CPU %d affinity\n", a);
	315	break;
	316	case 'c':
	317	if (argc < i + 2) {
	318	show_usage(argc, argv);
	319	return -1;
	320	}
	321	rduration = atol(argv[++i]);
	322	break;
	323	case 'd':
	324	if (argc < i + 2) {
	325	show_usage(argc, argv);
	326	return -1;
	327	}
	328	wdelay = atol(argv[++i]);
	329	break;
	330	case 'e':
	331	if (argc < i + 2) {
	332	show_usage(argc, argv);
	333	return -1;
	334	}
	335	wduration = atol(argv[++i]);
	336	break;
	337	case 'v':
	338	verbose_mode = 1;
	339	break;
	340	}
	341	}
	342
	343	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	344	duration, nr_readers, nr_writers);
	345	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	346	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	347	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	348	"main", urcu_get_thread_id());
de10a585	349
9aa14175 MD	350	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	351	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	352	count_reader = calloc(nr_readers, sizeof(*count_reader));
	353	count_writer = calloc(nr_writers, sizeof(*count_writer));
de10a585 MD	354
	355	next_aff = 0;
	356
	357	for (i = 0; i < nr_readers; i++) {
	358	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	359	&count_reader[i]);
	360	if (err != 0)
	361	exit(1);
	362	}
	363	for (i = 0; i < nr_writers; i++) {
	364	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	365	&count_writer[i]);
	366	if (err != 0)
	367	exit(1);
	368	}
	369
	370	cmm_smp_mb();
	371
	372	test_go = 1;
	373
	374	sleep(duration);
	375
	376	test_stop = 1;
	377
	378	for (i = 0; i < nr_readers; i++) {
	379	err = pthread_join(tid_reader[i], &tret);
	380	if (err != 0)
	381	exit(1);
	382	tot_reads += count_reader[i];
	383	}
	384	for (i = 0; i < nr_writers; i++) {
	385	err = pthread_join(tid_writer[i], &tret);
	386	if (err != 0)
	387	exit(1);
	388	tot_writes += count_writer[i];
	389	}
	390
	391	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	392	tot_writes);
	393	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
	394	"nr_writers %3u "
	395	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
	396	argv[0], duration, nr_readers, rduration, wduration,
	397	nr_writers, wdelay, tot_reads, tot_writes,
	398	tot_reads + tot_writes);
bcc74df3	399	free(test_rcu_pointer);
de10a585 MD	400	free(tid_reader);
	401	free(tid_writer);
	402	free(count_reader);
	403	free(count_writer);
	404	return 0;
	405	}