[urcu.git] / test_qsbr.c

/*
 * test_urcu.c
 *
 * Userspace RCU library - test program
 *
 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
 *
 * 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 <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 "arch.h"

/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
#define CACHE_LINE_SIZE 4096

#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

#define _LGPL_SOURCE
#include "urcu-qsbr.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;

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)

/*
 * 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 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);
	}
}

/*
 * malloc/free are reusing memory areas too quickly, which does not let us
 * test races appropriately. Use a large circular array for allocations.
 * ARRAY_SIZE is larger than nr_writers, which insures we never run over our tail.
 */
#define ARRAY_SIZE (1048576 * nr_writers)
#define ARRAY_POISON 0xDEADBEEF
static int array_index;
static struct test_array *test_array;

static struct test_array *test_array_alloc(void)
{
	struct test_array *ret;
	int index;

	rcu_copy_mutex_lock();
	index = array_index % ARRAY_SIZE;
	assert(test_array[index].a == ARRAY_POISON ||
		test_array[index].a == 0);
	ret = &test_array[index];
	array_index++;
	if (array_index == ARRAY_SIZE)
		array_index = 0;
	rcu_copy_mutex_unlock();
	return ret;
}

static void test_array_free(struct test_array *ptr)
{
	if (!ptr)
		return;
	rcu_copy_mutex_lock();
	ptr->a = ARRAY_POISON;
	rcu_copy_mutex_unlock();
}

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());

	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++;
		/* QS each 1024 reads */
		if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
			_rcu_quiescent_state();
		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);

}

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

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

	while (!test_go)
	{
	}
	smp_mb();

	for (;;) {
		new = test_array_alloc();
		rcu_copy_mutex_lock();
		old = test_rcu_pointer;
		if (old)
			assert(old->a == 8);
		new->a = 8;
		old = _rcu_publish_content(&test_rcu_pointer, new);
		rcu_copy_mutex_unlock();
		/* can be done after unlock */
		if (old)
			old->a = 0;
		test_array_free(old);
		nr_writes++;
		if (unlikely(!test_duration_write()))
			break;
		if (unlikely(wdelay))
			loop_sleep(wdelay);
	}

	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"writer", pthread_self(), (unsigned long)gettid());
	*count = 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(" [-v] (verbose output)");
	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	printf("\n");
}

cpu_set_t affinity;

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;
	int use_affinity = 0;

	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;
	}

	CPU_ZERO(&affinity);

	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_SET(a, &affinity);
			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 '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());

	if (use_affinity
	    && sched_setaffinity(0, sizeof(affinity), &affinity) < 0) {
		perror("sched_setaffinity");
		exit(-1);
	}

	test_array = malloc(sizeof(*test_array) * ARRAY_SIZE);
	tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
	tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
	count_reader = malloc(sizeof(*count_reader) * nr_readers);
	count_writer = malloc(sizeof(*count_writer) * nr_writers);

	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);
	}

	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 "
		"nr_writers %3u "
		"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
		argv[0], duration, nr_readers, rduration,
		nr_writers, wdelay, tot_reads, tot_writes,
		tot_reads + tot_writes);
	test_array_free(test_rcu_pointer);
	free(test_array);
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
	return 0;
}
Commit	Line	Data
061159a0 MD	1	/*
	2	* test_urcu.c
	3	*
	4	* Userspace RCU library - test program
	5	*
	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
	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
9e97e478	23	#define _GNU_SOURCE
061159a0 MD	24	#include <stdio.h>
	25	#include <pthread.h>
	26	#include <stdlib.h>
	27	#include <string.h>
	28	#include <sys/types.h>
	29	#include <sys/wait.h>
	30	#include <unistd.h>
	31	#include <stdio.h>
	32	#include <assert.h>
	33	#include <sys/syscall.h>
9e97e478	34	#include <sched.h>
061159a0	35
7685d963 MD	36	#include "arch.h"
7685d963 MD	37
55271c13 MD	38	/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
	39	#define CACHE_LINE_SIZE 4096
	40
061159a0 MD	41	#if defined(_syscall0)
	42	_syscall0(pid_t, gettid)
	43	#elif defined(__NR_gettid)
	44	static inline pid_t gettid(void)
	45	{
	46	return syscall(__NR_gettid);
	47	}
	48	#else
	49	#warning "use pid as tid"
	50	static inline pid_t gettid(void)
	51	{
	52	return getpid();
	53	}
	54	#endif
	55
	56	#define _LGPL_SOURCE
	57	#include "urcu-qsbr.h"
	58
	59	struct test_array {
	60	int a;
	61	};
	62
78efb485	63	static volatile int test_go, test_stop;
061159a0	64
9e31d0f0	65	static unsigned long wdelay;
061159a0 MD	66
	67	static struct test_array *test_rcu_pointer;
	68
	69	static unsigned long duration;
061159a0	70
daddf5b0	71	/* read-side C.S. duration, in loops */
8b632bab MD	72	static unsigned long rduration;
8b632bab MD	73
daddf5b0 MD	74	static inline void loop_sleep(unsigned long l)
	75	{
	76	while(l-- != 0)
	77	cpu_relax();
	78	}
	79
4bad7d45 MD	80	static int verbose_mode;
	81
	82	#define printf_verbose(fmt, args...) \
	83	do { \
	84	if (verbose_mode) \
	85	printf(fmt, args); \
	86	} while (0)
	87
061159a0 MD	88	/*
	89	* returns 0 if test should end.
	90	*/
	91	static int test_duration_write(void)
	92	{
78efb485	93	return !test_stop;
061159a0 MD	94	}
	95
	96	static int test_duration_read(void)
	97	{
78efb485	98	return !test_stop;
061159a0 MD	99	}
	100
	101	static unsigned long long __thread nr_writes;
	102	static unsigned long long __thread nr_reads;
	103
	104	static unsigned int nr_readers;
	105	static unsigned int nr_writers;
	106
	107	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	108
	109	void rcu_copy_mutex_lock(void)
	110	{
	111	int ret;
	112	ret = pthread_mutex_lock(&rcu_copy_mutex);
	113	if (ret) {
	114	perror("Error in pthread mutex lock");
	115	exit(-1);
	116	}
	117	}
	118
	119	void rcu_copy_mutex_unlock(void)
	120	{
	121	int ret;
	122
	123	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	124	if (ret) {
	125	perror("Error in pthread mutex unlock");
	126	exit(-1);
	127	}
	128	}
	129
	130	/*
	131	* malloc/free are reusing memory areas too quickly, which does not let us
	132	* test races appropriately. Use a large circular array for allocations.
	133	* ARRAY_SIZE is larger than nr_writers, which insures we never run over our tail.
	134	*/
	135	#define ARRAY_SIZE (1048576 * nr_writers)
	136	#define ARRAY_POISON 0xDEADBEEF
	137	static int array_index;
	138	static struct test_array *test_array;
	139
	140	static struct test_array *test_array_alloc(void)
	141	{
	142	struct test_array *ret;
	143	int index;
	144
	145	rcu_copy_mutex_lock();
	146	index = array_index % ARRAY_SIZE;
	147	assert(test_array[index].a == ARRAY_POISON \|\|
	148	test_array[index].a == 0);
	149	ret = &test_array[index];
	150	array_index++;
	151	if (array_index == ARRAY_SIZE)
	152	array_index = 0;
	153	rcu_copy_mutex_unlock();
	154	return ret;
	155	}
	156
	157	static void test_array_free(struct test_array *ptr)
	158	{
	159	if (!ptr)
	160	return;
	161	rcu_copy_mutex_lock();
	162	ptr->a = ARRAY_POISON;
163	rcu_copy_mutex_unlock();
164	}
165
166	void thr_reader(void _count)
167	{
168	unsigned long long *count = _count;
169	struct test_array *local_ptr;
170
4bad7d45	171	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
061159a0 MD	172	"reader", pthread_self(), (unsigned long)gettid());
	173
	174	rcu_register_thread();
	175
	176	while (!test_go)
	177	{
	178	}
7685d963	179	smp_mb();
061159a0 MD	180
	181	for (;;) {
	182	_rcu_read_lock();
	183	local_ptr = _rcu_dereference(test_rcu_pointer);
	184	debug_yield_read();
	185	if (local_ptr)
	186	assert(local_ptr->a == 8);
8b632bab	187	if (unlikely(rduration))
daddf5b0	188	loop_sleep(rduration);
061159a0 MD	189	_rcu_read_unlock();
061159a0 MD	190	nr_reads++;
78efb485	191	/* QS each 1024 reads */
59d5a406	192	if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
061159a0	193	_rcu_quiescent_state();
59d5a406	194	if (unlikely(!test_duration_read()))
061159a0 MD	195	break;
	196	}
	197
	198	rcu_unregister_thread();
	199
	200	*count = nr_reads;
4bad7d45	201	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
061159a0 MD	202	"reader", pthread_self(), (unsigned long)gettid());
	203	return ((void*)1);
	204
	205	}
	206
	207	void thr_writer(void _count)
	208	{
	209	unsigned long long *count = _count;
	210	struct test_array new, old;
	211
4bad7d45	212	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
061159a0 MD	213	"writer", pthread_self(), (unsigned long)gettid());
	214
	215	while (!test_go)
	216	{
	217	}
7685d963	218	smp_mb();
061159a0 MD	219
	220	for (;;) {
	221	new = test_array_alloc();
	222	rcu_copy_mutex_lock();
	223	old = test_rcu_pointer;
	224	if (old)
	225	assert(old->a == 8);
	226	new->a = 8;
	227	old = _rcu_publish_content(&test_rcu_pointer, new);
	228	rcu_copy_mutex_unlock();
	229	/* can be done after unlock */
	230	if (old)
	231	old->a = 0;
	232	test_array_free(old);
	233	nr_writes++;
59d5a406	234	if (unlikely(!test_duration_write()))
061159a0	235	break;
59d5a406	236	if (unlikely(wdelay))
9e31d0f0	237	loop_sleep(wdelay);
061159a0 MD	238	}
061159a0 MD	239
4bad7d45	240	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
061159a0 MD	241	"writer", pthread_self(), (unsigned long)gettid());
	242	*count = nr_writes;
	243	return ((void*)2);
	244	}
	245
	246	void show_usage(int argc, char **argv)
	247	{
	248	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	249	#ifdef DEBUG_YIELD
	250	printf(" [-r] [-w] (yield reader and/or writer)");
	251	#endif
7685d963	252	printf(" [-d delay] (writer period (us))");
daddf5b0	253	printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45	254	printf(" [-v] (verbose output)");
9e97e478	255	printf(" [-a cpu#] [-a cpu#]... (affinity)");
061159a0 MD	256	printf("\n");
	257	}
	258
9e97e478 MD	259	cpu_set_t affinity;
9e97e478 MD	260
061159a0 MD	261	int main(int argc, char **argv)
	262	{
	263	int err;
	264	pthread_t tid_reader, tid_writer;
	265	void *tret;
	266	unsigned long long count_reader, count_writer;
	267	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 MD	268	int i, a;
9e97e478 MD	269	int use_affinity = 0;
061159a0 MD	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
9e97e478 MD	294	CPU_ZERO(&affinity);
9e97e478 MD	295
061159a0 MD	296	for (i = 4; i < argc; i++) {
	297	if (argv[i][0] != '-')
	298	continue;
	299	switch (argv[i][1]) {
	300	#ifdef DEBUG_YIELD
	301	case 'r':
	302	yield_active \|= YIELD_READ;
	303	break;
	304	case 'w':
	305	yield_active \|= YIELD_WRITE;
	306	break;
	307	#endif
9e97e478 MD	308	case 'a':
	309	if (argc < i + 2) {
	310	show_usage(argc, argv);
	311	return -1;
	312	}
	313	a = atoi(argv[++i]);
	314	CPU_SET(a, &affinity);
	315	use_affinity = 1;
4bad7d45	316	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	317	break;
8b632bab MD	318	case 'c':
	319	if (argc < i + 2) {
	320	show_usage(argc, argv);
	321	return -1;
	322	}
9e31d0f0	323	rduration = atol(argv[++i]);
8b632bab	324	break;
061159a0 MD	325	case 'd':
	326	if (argc < i + 2) {
	327	show_usage(argc, argv);
	328	return -1;
	329	}
9e31d0f0	330	wdelay = atol(argv[++i]);
061159a0	331	break;
4bad7d45 MD	332	case 'v':
	333	verbose_mode = 1;
	334	break;
061159a0 MD	335	}
	336	}
	337
4bad7d45	338	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
061159a0	339	duration, nr_readers, nr_writers);
9e31d0f0	340	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	341	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	342	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
061159a0 MD	343	"main", pthread_self(), (unsigned long)gettid());
061159a0 MD	344
9e97e478 MD	345	if (use_affinity
	346	&& sched_setaffinity(0, sizeof(affinity), &affinity) < 0) {
	347	perror("sched_setaffinity");
	348	exit(-1);
	349	}
	350
061159a0 MD	351	test_array = malloc(sizeof(test_array) ARRAY_SIZE);
	352	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	353	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	354	count_reader = malloc(sizeof(count_reader) nr_readers);
	355	count_writer = malloc(sizeof(count_writer) nr_writers);
	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
7685d963	370	smp_mb();
061159a0	371
78efb485 MD	372	test_go = 1;
	373
	374	sleep(duration);
	375
	376	test_stop = 1;
	377
061159a0 MD	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
4bad7d45	391	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
061159a0	392	tot_writes);
6a190115	393	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d	394	"nr_writers %3u "
9e31d0f0	395	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
4bad7d45 MD	396	argv[0], duration, nr_readers, rduration,
	397	nr_writers, wdelay, tot_reads, tot_writes,
	398	tot_reads + tot_writes);
061159a0 MD	399	test_array_free(test_rcu_pointer);
	400	free(test_array);
	401	free(tid_reader);
	402	free(tid_writer);
	403	free(count_reader);
	404	free(count_writer);
	405	return 0;
	406	}