[urcu.git] / tests / test_urcu_defer.c

/*
 * test_urcu_defer.c
 *
 * Userspace RCU library - test program (with automatic reclamation)
 *
 * 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 "../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 <sys/syscall.h>
#include <sched.h>
#include <errno.h>

#include <urcu/arch.h>

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

#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

#ifndef DYNAMIC_LINK_TEST
#define _LGPL_SOURCE
#else
#define debug_yield_read()
#endif
#include <urcu.h>
#include <urcu-defer.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)

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;

#ifndef HAVE_CPU_SET_T
typedef unsigned long cpu_set_t;
# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
#endif

static void set_affinity(void)
{
	cpu_set_t mask;
	int cpu;
	int ret;

	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 unsigned long long __thread nr_writes;
static unsigned long long __thread nr_reads;

static
unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;

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;
	struct test_array *local_ptr;

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

	set_affinity();

	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++;
		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);

}

static void test_cb2(void *data)
{
}

static void test_cb1(void *data)
{
}

void *thr_writer(void *data)
{
	unsigned long wtidx = (unsigned long)data;
	struct test_array *new, *old = NULL;

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

	set_affinity();

	rcu_defer_register_thread();

	while (!test_go)
	{
	}
	smp_mb();

	for (;;) {
		new = malloc(sizeof(*new));
		new->a = 8;
		old = rcu_xchg_pointer(&test_rcu_pointer, new);
		defer_rcu(free, old);
		defer_rcu(test_cb1, old);
		defer_rcu(test_cb1, (void *)-2L);
		defer_rcu(test_cb1, (void *)-2L);
		defer_rcu(test_cb1, old);
		defer_rcu(test_cb2, (void *)-2L);
		defer_rcu(test_cb2, (void *)-4L);
		defer_rcu(test_cb2, (void *)-2L);
		nr_writes++;
		if (unlikely(!test_duration_write()))
			break;
		if (unlikely(wdelay))
			loop_sleep(wdelay);
	}

	rcu_defer_unregister_thread();

	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"writer", pthread_self(), (unsigned long)gettid());
	tot_nr_writes[wtidx] = 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");
}

int main(int argc, char **argv)
{
	int err;
	pthread_t *tid_reader, *tid_writer;
	void *tret;
	unsigned long long *count_reader;
	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]) {
#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_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 '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());

	tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
	tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
	count_reader = malloc(sizeof(*count_reader) * nr_readers);
	tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);

	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,
				     (void *)(long)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 += tot_nr_writes[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);
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(tot_nr_writes);

	return 0;
}
Commit	Line	Data
90075a50	1	/*
786ee85b	2	* test_urcu_defer.c
90075a50 MD	3	*
	4	* Userspace RCU library - test program (with automatic reclamation)
	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
	23	#define _GNU_SOURCE
d8540fc5	24	#include "../config.h"
90075a50 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>
	34	#include <sys/syscall.h>
	35	#include <sched.h>
94b343fd	36	#include <errno.h>
90075a50	37
ec4e58a3	38	#include <urcu/arch.h>
90075a50	39
90075a50 MD	40	/* hardcoded number of CPUs */
	41	#define NR_CPUS 16384
	42
	43	#if defined(_syscall0)
	44	_syscall0(pid_t, gettid)
	45	#elif defined(__NR_gettid)
	46	static inline pid_t gettid(void)
	47	{
	48	return syscall(__NR_gettid);
	49	}
	50	#else
	51	#warning "use pid as tid"
	52	static inline pid_t gettid(void)
	53	{
	54	return getpid();
	55	}
	56	#endif
	57
	58	#ifndef DYNAMIC_LINK_TEST
	59	#define _LGPL_SOURCE
	60	#else
	61	#define debug_yield_read()
	62	#endif
ec4e58a3 MD	63	#include <urcu.h>
ec4e58a3 MD	64	#include <urcu-defer.h>
90075a50 MD	65
	66	struct test_array {
	67	int a;
	68	};
	69
	70	static volatile int test_go, test_stop;
	71
	72	static unsigned long wdelay;
	73
	74	static struct test_array *test_rcu_pointer;
	75
	76	static unsigned long duration;
	77
	78	/* read-side C.S. duration, in loops */
	79	static unsigned long rduration;
	80
	81	static inline void loop_sleep(unsigned long l)
	82	{
	83	while(l-- != 0)
	84	cpu_relax();
	85	}
	86
	87	static int verbose_mode;
	88
	89	#define printf_verbose(fmt, args...) \
	90	do { \
	91	if (verbose_mode) \
	92	printf(fmt, args); \
	93	} while (0)
	94
	95	static unsigned int cpu_affinities[NR_CPUS];
	96	static unsigned int next_aff = 0;
	97	static int use_affinity = 0;
	98
	99	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	100
d8540fc5 PA	101	#ifndef HAVE_CPU_SET_T
	102	typedef unsigned long cpu_set_t;
	103	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	104	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	105	#endif
	106
90075a50 MD	107	static void set_affinity(void)
	108	{
	109	cpu_set_t mask;
	110	int cpu;
	111	int ret;
	112
	113	if (!use_affinity)
	114	return;
	115
d8540fc5	116	#if HAVE_SCHED_SETAFFINITY
90075a50 MD	117	ret = pthread_mutex_lock(&affinity_mutex);
	118	if (ret) {
	119	perror("Error in pthread mutex lock");
	120	exit(-1);
	121	}
	122	cpu = cpu_affinities[next_aff++];
	123	ret = pthread_mutex_unlock(&affinity_mutex);
	124	if (ret) {
	125	perror("Error in pthread mutex unlock");
	126	exit(-1);
	127	}
d8540fc5	128
90075a50 MD	129	CPU_ZERO(&mask);
90075a50 MD	130	CPU_SET(cpu, &mask);
d8540fc5 PA	131	#if SCHED_SETAFFINITY_ARGS == 2
	132	sched_setaffinity(0, &mask);
	133	#else
90075a50	134	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	135	#endif
d8540fc5 PA	136	#endif /* HAVE_SCHED_SETAFFINITY */
90075a50 MD	137	}
	138
	139	/*
	140	* returns 0 if test should end.
	141	*/
	142	static int test_duration_write(void)
	143	{
	144	return !test_stop;
	145	}
	146
	147	static int test_duration_read(void)
	148	{
	149	return !test_stop;
	150	}
	151
	152	static unsigned long long __thread nr_writes;
	153	static unsigned long long __thread nr_reads;
	154
	155	static
	156	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
	157
	158	static unsigned int nr_readers;
	159	static unsigned int nr_writers;
	160
	161	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	162
	163	void rcu_copy_mutex_lock(void)
	164	{
	165	int ret;
	166	ret = pthread_mutex_lock(&rcu_copy_mutex);
	167	if (ret) {
	168	perror("Error in pthread mutex lock");
	169	exit(-1);
	170	}
	171	}
	172
	173	void rcu_copy_mutex_unlock(void)
	174	{
	175	int ret;
	176
	177	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	178	if (ret) {
	179	perror("Error in pthread mutex unlock");
	180	exit(-1);
	181	}
	182	}
	183
	184	void thr_reader(void _count)
	185	{
	186	unsigned long long *count = _count;
	187	struct test_array *local_ptr;
	188
	189	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	190	"reader", pthread_self(), (unsigned long)gettid());
	191
	192	set_affinity();
	193
	194	rcu_register_thread();
	195
	196	while (!test_go)
	197	{
	198	}
	199	smp_mb();
	200
201	for (;;) {
202	rcu_read_lock();
203	local_ptr = rcu_dereference(test_rcu_pointer);
204	debug_yield_read();
205	if (local_ptr)
206	assert(local_ptr->a == 8);
207	if (unlikely(rduration))
208	loop_sleep(rduration);
209	rcu_read_unlock();
210	nr_reads++;
211	if (unlikely(!test_duration_read()))
212	break;
213	}
214
215	rcu_unregister_thread();
216
217	*count = nr_reads;
218	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
219	"reader", pthread_self(), (unsigned long)gettid());
220	return ((void*)1);
221
222	}
223
804b4375 MD	224	static void test_cb2(void *data)
	225	{
	226	}
	227
	228	static void test_cb1(void *data)
	229	{
	230	}
	231
90075a50 MD	232	void thr_writer(void data)
	233	{
	234	unsigned long wtidx = (unsigned long)data;
	235	struct test_array new, old = NULL;
	236
	237	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	238	"writer", pthread_self(), (unsigned long)gettid());
	239
	240	set_affinity();
	241
786ee85b	242	rcu_defer_register_thread();
90075a50 MD	243
	244	while (!test_go)
	245	{
	246	}
	247	smp_mb();
	248
	249	for (;;) {
	250	new = malloc(sizeof(*new));
	251	new->a = 8;
	252	old = rcu_xchg_pointer(&test_rcu_pointer, new);
b4f313b7 MD	253	defer_rcu(free, old);
	254	defer_rcu(test_cb1, old);
	255	defer_rcu(test_cb1, (void *)-2L);
	256	defer_rcu(test_cb1, (void *)-2L);
	257	defer_rcu(test_cb1, old);
	258	defer_rcu(test_cb2, (void *)-2L);
	259	defer_rcu(test_cb2, (void *)-4L);
	260	defer_rcu(test_cb2, (void *)-2L);
90075a50 MD	261	nr_writes++;
	262	if (unlikely(!test_duration_write()))
	263	break;
	264	if (unlikely(wdelay))
	265	loop_sleep(wdelay);
	266	}
	267
786ee85b	268	rcu_defer_unregister_thread();
90075a50 MD	269
	270	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	271	"writer", pthread_self(), (unsigned long)gettid());
	272	tot_nr_writes[wtidx] = nr_writes;
	273	return ((void*)2);
	274	}
	275
	276	void show_usage(int argc, char **argv)
	277	{
	278	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	279	#ifdef DEBUG_YIELD
	280	printf(" [-r] [-w] (yield reader and/or writer)");
	281	#endif
	282	printf(" [-d delay] (writer period (us))");
	283	printf(" [-c duration] (reader C.S. duration (in loops))");
	284	printf(" [-v] (verbose output)");
	285	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	286	printf("\n");
	287	}
	288
	289	int main(int argc, char **argv)
	290	{
	291	int err;
	292	pthread_t tid_reader, tid_writer;
	293	void *tret;
	294	unsigned long long *count_reader;
	295	unsigned long long tot_reads = 0, tot_writes = 0;
	296	int i, a;
	297
	298	if (argc < 4) {
	299	show_usage(argc, argv);
	300	return -1;
	301	}
	302
	303	err = sscanf(argv[1], "%u", &nr_readers);
	304	if (err != 1) {
	305	show_usage(argc, argv);
	306	return -1;
	307	}
	308
	309	err = sscanf(argv[2], "%u", &nr_writers);
	310	if (err != 1) {
	311	show_usage(argc, argv);
	312	return -1;
	313	}
	314
	315	err = sscanf(argv[3], "%lu", &duration);
	316	if (err != 1) {
	317	show_usage(argc, argv);
	318	return -1;
	319	}
	320
	321	for (i = 4; i < argc; i++) {
	322	if (argv[i][0] != '-')
	323	continue;
	324	switch (argv[i][1]) {
	325	#ifdef DEBUG_YIELD
	326	case 'r':
	327	yield_active \|= YIELD_READ;
	328	break;
	329	case 'w':
	330	yield_active \|= YIELD_WRITE;
	331	break;
	332	#endif
333	case 'a':
334	if (argc < i + 2) {
335	show_usage(argc, argv);
336	return -1;
337	}
338	a = atoi(argv[++i]);
339	cpu_affinities[next_aff++] = a;
340	use_affinity = 1;
341	printf_verbose("Adding CPU %d affinity\n", a);
342	break;
343	case 'c':
344	if (argc < i + 2) {
345	show_usage(argc, argv);
346	return -1;
347	}
348	rduration = atol(argv[++i]);
349	break;
350	case 'd':
351	if (argc < i + 2) {
352	show_usage(argc, argv);
353	return -1;
354	}
355	wdelay = atol(argv[++i]);
356	break;
357	case 'v':
358	verbose_mode = 1;
359	break;
360	}
361	}
362
363	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
364	duration, nr_readers, nr_writers);
365	printf_verbose("Writer delay : %lu loops.\n", wdelay);
366	printf_verbose("Reader duration : %lu loops.\n", rduration);
367	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
368	"main", pthread_self(), (unsigned long)gettid());
369
370	tid_reader = malloc(sizeof(tid_reader) nr_readers);
371	tid_writer = malloc(sizeof(tid_writer) nr_writers);
372	count_reader = malloc(sizeof(count_reader) nr_readers);
373	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
374
375	next_aff = 0;
376
377	for (i = 0; i < nr_readers; i++) {
378	err = pthread_create(&tid_reader[i], NULL, thr_reader,
379	&count_reader[i]);
380	if (err != 0)
381	exit(1);
382	}
383	for (i = 0; i < nr_writers; i++) {
384	err = pthread_create(&tid_writer[i], NULL, thr_writer,
385	(void *)(long)i);
386	if (err != 0)
387	exit(1);
388	}
389
390	smp_mb();
391
392	test_go = 1;
393
394	sleep(duration);
395
396	test_stop = 1;
397
398	for (i = 0; i < nr_readers; i++) {
399	err = pthread_join(tid_reader[i], &tret);
400	if (err != 0)
401	exit(1);
402	tot_reads += count_reader[i];
403	}
404	for (i = 0; i < nr_writers; i++) {
405	err = pthread_join(tid_writer[i], &tret);
406	if (err != 0)
407	exit(1);
408	tot_writes += tot_nr_writes[i];
409	}
410
411	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
412	tot_writes);
413	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
414	"nr_writers %3u "
415	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
416	argv[0], duration, nr_readers, rduration,
417	nr_writers, wdelay, tot_reads, tot_writes,
418	tot_reads + tot_writes);
419	free(tid_reader);
420	free(tid_writer);
421	free(count_reader);
422	free(tot_nr_writes);
423
424	return 0;
425	}