[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.
 */

#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
de10a585 MD	23	#include <stdio.h>
	24	#include <pthread.h>
	25	#include <stdlib.h>
	26	#include <string.h>
	27	#include <sys/types.h>
	28	#include <sys/wait.h>
	29	#include <unistd.h>
	30	#include <stdio.h>
	31	#include <assert.h>
de10a585 MD	32	#include <errno.h>
	33
	34	#include <urcu/arch.h>
bd252a04	35	#include <urcu/tls-compat.h>
2953b501	36	#include "cpuset.h"
94df6318	37	#include "thread-id.h"
2650042a	38	#include "../common/debug-yield.h"
de10a585 MD	39
	40	/* hardcoded number of CPUs */
	41	#define NR_CPUS 16384
	42
de10a585 MD	43	#ifndef DYNAMIC_LINK_TEST
de10a585 MD	44	#define _LGPL_SOURCE
de10a585 MD	45	#endif
	46	#include "urcu-qsbr.h"
	47
de10a585 MD	48	static volatile int test_go, test_stop;
	49
	50	static unsigned long wdelay;
	51
bcc74df3	52	static int *test_rcu_pointer;
de10a585 MD	53
	54	static unsigned long duration;
	55
	56	/* read-side C.S. duration, in loops */
	57	static unsigned long rduration;
	58
	59	/* write-side C.S. duration, in loops */
	60	static unsigned long wduration;
	61
ab0aacbe	62	static inline void loop_sleep(unsigned long loops)
de10a585	63	{
ab0aacbe	64	while (loops-- != 0)
de10a585 MD	65	caa_cpu_relax();
	66	}
	67
	68	static int verbose_mode;
	69
	70	#define printf_verbose(fmt, args...) \
	71	do { \
	72	if (verbose_mode) \
	73	printf(fmt, args); \
	74	} while (0)
	75
	76	static unsigned int cpu_affinities[NR_CPUS];
	77	static unsigned int next_aff = 0;
	78	static int use_affinity = 0;
	79
	80	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	81
de10a585 MD	82	static void set_affinity(void)
de10a585 MD	83	{
95bc7fb9	84	#if HAVE_SCHED_SETAFFINITY
de10a585	85	cpu_set_t mask;
95bc7fb9 MD	86	int cpu, ret;
95bc7fb9 MD	87	#endif /* HAVE_SCHED_SETAFFINITY */
de10a585 MD	88
	89	if (!use_affinity)
	90	return;
	91
	92	#if HAVE_SCHED_SETAFFINITY
	93	ret = pthread_mutex_lock(&affinity_mutex);
	94	if (ret) {
	95	perror("Error in pthread mutex lock");
	96	exit(-1);
	97	}
	98	cpu = cpu_affinities[next_aff++];
	99	ret = pthread_mutex_unlock(&affinity_mutex);
	100	if (ret) {
	101	perror("Error in pthread mutex unlock");
	102	exit(-1);
	103	}
	104	CPU_ZERO(&mask);
	105	CPU_SET(cpu, &mask);
	106	#if SCHED_SETAFFINITY_ARGS == 2
	107	sched_setaffinity(0, &mask);
	108	#else
	109	sched_setaffinity(0, sizeof(mask), &mask);
	110	#endif
	111	#endif /* HAVE_SCHED_SETAFFINITY */
	112	}
	113
	114	/*
	115	* returns 0 if test should end.
	116	*/
	117	static int test_duration_write(void)
	118	{
	119	return !test_stop;
	120	}
	121
	122	static int test_duration_read(void)
	123	{
	124	return !test_stop;
	125	}
	126
bd252a04 MD	127	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	128	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
de10a585 MD	129
	130	static unsigned int nr_readers;
	131	static unsigned int nr_writers;
	132
	133	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	134
	135	void rcu_copy_mutex_lock(void)
	136	{
	137	int ret;
	138	ret = pthread_mutex_lock(&rcu_copy_mutex);
	139	if (ret) {
	140	perror("Error in pthread mutex lock");
	141	exit(-1);
	142	}
	143	}
	144
	145	void rcu_copy_mutex_unlock(void)
	146	{
	147	int ret;
	148
	149	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	150	if (ret) {
	151	perror("Error in pthread mutex unlock");
	152	exit(-1);
	153	}
	154	}
	155
de10a585 MD	156	void thr_reader(void _count)
	157	{
	158	unsigned long long *count = _count;
bcc74df3	159	int *local_ptr;
de10a585	160
94df6318 MD	161	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	162	"reader", urcu_get_thread_id());
de10a585 MD	163
	164	set_affinity();
	165
	166	rcu_register_thread();
	167
882f3357 MD	168	assert(rcu_read_ongoing());
	169	rcu_thread_offline();
	170	assert(!rcu_read_ongoing());
	171	rcu_thread_online();
	172
de10a585 MD	173	while (!test_go)
	174	{
	175	}
	176	cmm_smp_mb();
	177
	178	for (;;) {
	179	rcu_read_lock();
882f3357	180	assert(rcu_read_ongoing());
de10a585	181	local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b	182	rcu_debug_yield_read();
de10a585	183	if (local_ptr)
bcc74df3	184	assert(*local_ptr == 8);
a0b7f7ea	185	if (caa_unlikely(rduration))
de10a585 MD	186	loop_sleep(rduration);
de10a585 MD	187	rcu_read_unlock();
bd252a04	188	URCU_TLS(nr_reads)++;
de10a585	189	/* QS each 1024 reads */
bd252a04	190	if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
de10a585	191	rcu_quiescent_state();
a0b7f7ea	192	if (caa_unlikely(!test_duration_read()))
de10a585 MD	193	break;
	194	}
	195
	196	rcu_unregister_thread();
	197
	198	/* test extra thread registration */
	199	rcu_register_thread();
	200	rcu_unregister_thread();
	201
bd252a04	202	*count = URCU_TLS(nr_reads);
94df6318 MD	203	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	204	"reader", urcu_get_thread_id());
de10a585 MD	205	return ((void*)1);
	206
	207	}
	208
	209	void thr_writer(void _count)
	210	{
	211	unsigned long long *count = _count;
bcc74df3	212	int new, old;
de10a585	213
94df6318 MD	214	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	215	"writer", urcu_get_thread_id());
de10a585 MD	216
	217	set_affinity();
	218
	219	while (!test_go)
	220	{
	221	}
	222	cmm_smp_mb();
	223
	224	for (;;) {
bcc74df3 MD	225	new = malloc(sizeof(int));
	226	assert(new);
	227	*new = 8;
de10a585	228	old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea	229	if (caa_unlikely(wduration))
de10a585 MD	230	loop_sleep(wduration);
de10a585 MD	231	synchronize_rcu();
de10a585	232	if (old)
bcc74df3 MD	233	*old = 0;
bcc74df3 MD	234	free(old);
bd252a04	235	URCU_TLS(nr_writes)++;
a0b7f7ea	236	if (caa_unlikely(!test_duration_write()))
de10a585	237	break;
a0b7f7ea	238	if (caa_unlikely(wdelay))
de10a585 MD	239	loop_sleep(wdelay);
	240	}
	241
94df6318 MD	242	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	243	"writer", urcu_get_thread_id());
bd252a04	244	*count = URCU_TLS(nr_writes);
de10a585 MD	245	return ((void*)2);
	246	}
	247
	248	void show_usage(int argc, char **argv)
	249	{
06637138 MD	250	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	251	argv[0]);
	252	printf("OPTIONS:\n");
06637138	253	printf(" [-r] [-w] (yield reader and/or writer)\n");
06637138 MD	254	printf(" [-d delay] (writer period (us))\n");
	255	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	256	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	257	printf(" [-v] (verbose output)\n");
	258	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
de10a585 MD	259	printf("\n");
	260	}
	261
	262	int main(int argc, char **argv)
	263	{
	264	int err;
	265	pthread_t tid_reader, tid_writer;
	266	void *tret;
	267	unsigned long long count_reader, count_writer;
	268	unsigned long long tot_reads = 0, tot_writes = 0;
	269	int i, a;
	270
	271	if (argc < 4) {
	272	show_usage(argc, argv);
	273	return -1;
	274	}
	275
	276	err = sscanf(argv[1], "%u", &nr_readers);
	277	if (err != 1) {
	278	show_usage(argc, argv);
	279	return -1;
	280	}
	281
	282	err = sscanf(argv[2], "%u", &nr_writers);
	283	if (err != 1) {
	284	show_usage(argc, argv);
	285	return -1;
	286	}
	287
	288	err = sscanf(argv[3], "%lu", &duration);
	289	if (err != 1) {
	290	show_usage(argc, argv);
	291	return -1;
	292	}
	293
	294	for (i = 4; i < argc; i++) {
	295	if (argv[i][0] != '-')
	296	continue;
	297	switch (argv[i][1]) {
de10a585	298	case 'r':
2650042a	299	rcu_debug_yield_enable(RCU_YIELD_READ);
de10a585 MD	300	break;
de10a585 MD	301	case 'w':
2650042a	302	rcu_debug_yield_enable(RCU_YIELD_WRITE);
de10a585	303	break;
de10a585 MD	304	case 'a':
	305	if (argc < i + 2) {
	306	show_usage(argc, argv);
	307	return -1;
	308	}
	309	a = atoi(argv[++i]);
	310	cpu_affinities[next_aff++] = a;
	311	use_affinity = 1;
	312	printf_verbose("Adding CPU %d affinity\n", a);
	313	break;
	314	case 'c':
	315	if (argc < i + 2) {
	316	show_usage(argc, argv);
	317	return -1;
	318	}
	319	rduration = atol(argv[++i]);
	320	break;
	321	case 'd':
	322	if (argc < i + 2) {
	323	show_usage(argc, argv);
	324	return -1;
	325	}
	326	wdelay = atol(argv[++i]);
	327	break;
	328	case 'e':
	329	if (argc < i + 2) {
	330	show_usage(argc, argv);
	331	return -1;
	332	}
	333	wduration = atol(argv[++i]);
	334	break;
	335	case 'v':
	336	verbose_mode = 1;
	337	break;
	338	}
	339	}
	340
	341	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	342	duration, nr_readers, nr_writers);
	343	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	344	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	345	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	346	"main", urcu_get_thread_id());
de10a585	347
9aa14175 MD	348	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	349	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	350	count_reader = calloc(nr_readers, sizeof(*count_reader));
	351	count_writer = calloc(nr_writers, sizeof(*count_writer));
de10a585 MD	352
	353	next_aff = 0;
	354
	355	for (i = 0; i < nr_readers; i++) {
	356	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	357	&count_reader[i]);
	358	if (err != 0)
	359	exit(1);
	360	}
	361	for (i = 0; i < nr_writers; i++) {
	362	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	363	&count_writer[i]);
	364	if (err != 0)
	365	exit(1);
	366	}
	367
	368	cmm_smp_mb();
	369
	370	test_go = 1;
	371
	372	sleep(duration);
	373
	374	test_stop = 1;
	375
	376	for (i = 0; i < nr_readers; i++) {
	377	err = pthread_join(tid_reader[i], &tret);
	378	if (err != 0)
	379	exit(1);
	380	tot_reads += count_reader[i];
	381	}
	382	for (i = 0; i < nr_writers; i++) {
	383	err = pthread_join(tid_writer[i], &tret);
	384	if (err != 0)
	385	exit(1);
	386	tot_writes += count_writer[i];
	387	}
	388
	389	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	390	tot_writes);
	391	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
	392	"nr_writers %3u "
	393	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
	394	argv[0], duration, nr_readers, rduration, wduration,
	395	nr_writers, wdelay, tot_reads, tot_writes,
	396	tot_reads + tot_writes);
bcc74df3	397	free(test_rcu_pointer);
de10a585 MD	398	free(tid_reader);
	399	free(tid_writer);
	400	free(count_reader);
	401	free(count_writer);
	402	return 0;
	403	}