[urcu.git] / tests / benchmark / test_mutex.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 "thread-id.h"

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

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

struct test_array {
	int a;
};

static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;

static volatile int test_go, test_stop;

static unsigned long wdelay;

static volatile struct test_array test_array = { 8 };

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);
	sched_setaffinity(0, sizeof(mask), &mask);
#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 long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
static
unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;

static unsigned int nr_readers;
static unsigned int nr_writers;

pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;

static
void *thr_reader(void *data)
{
	unsigned long tidx = (unsigned long)data;

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

	set_affinity();

	while (!test_go)
	{
	}

	for (;;) {
		int v;

		pthread_mutex_lock(&lock);
		v = test_array.a;
		assert(v == 8);
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
		pthread_mutex_unlock(&lock);
		URCU_TLS(nr_reads)++;
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	tot_nr_reads[tidx] = URCU_TLS(nr_reads);
	printf_verbose("thread_end %s, tid %lu\n",
			"reader", urcu_get_thread_id());
	return ((void*)1);

}

static
void *thr_writer(void *data)
{
	unsigned long wtidx = (unsigned long)data;

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

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		pthread_mutex_lock(&lock);
		test_array.a = 0;
		test_array.a = 8;
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		pthread_mutex_unlock(&lock);
		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());
	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
	return ((void*)2);
}

static
void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
		argv[0]);
	printf("OPTIONS:\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;
	unsigned int i_thr;

	if (argc < 4) {
		show_usage(argc, argv);
		return -1;
	}
	cmm_smp_mb();

	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 '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));
	tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads));
	tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));

	next_aff = 0;

	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
		err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
				     (void *)(long)i_thr);
		if (err != 0)
			exit(1);
	}
	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
		err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
				     (void *)(long)i_thr);
		if (err != 0)
			exit(1);
	}

	cmm_smp_mb();

	test_go = 1;

	sleep(duration);

	test_stop = 1;

	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
		err = pthread_join(tid_reader[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_reads += tot_nr_reads[i_thr];
	}
	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
		err = pthread_join(tid_writer[i_thr], &tret);
		if (err != 0)
			exit(1);
		tot_writes += tot_nr_writes[i_thr];
	}

	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(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
	free(tot_nr_reads);
	free(tot_nr_writes);
	return 0;
}
Commit	Line	Data
51299083 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>
51299083 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
51299083 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>
94b343fd	32	#include <errno.h>
51299083	33
ec4e58a3	34	#include <urcu/arch.h>
bd252a04	35	#include <urcu/tls-compat.h>
94df6318	36	#include "thread-id.h"
65fcc7e9	37
2a7ac59d MD	38	/* hardcoded number of CPUs */
	39	#define NR_CPUS 16384
	40
51299083 MD	41	#ifndef DYNAMIC_LINK_TEST
51299083 MD	42	#define _LGPL_SOURCE
51299083	43	#endif
ec4e58a3	44	#include <urcu.h>
51299083 MD	45
	46	struct test_array {
	47	int a;
	48	};
	49
f61dfd97	50	static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
51299083 MD	51
	52	static volatile int test_go, test_stop;
	53
9e31d0f0	54	static unsigned long wdelay;
51299083 MD	55
	56	static volatile struct test_array test_array = { 8 };
	57
	58	static unsigned long duration;
	59
daddf5b0	60	/* read-side C.S. duration, in loops */
8b632bab MD	61	static unsigned long rduration;
8b632bab MD	62
31b598e0 MD	63	/* write-side C.S. duration, in loops */
	64	static unsigned long wduration;
	65
ab0aacbe	66	static inline void loop_sleep(unsigned long loops)
daddf5b0	67	{
ab0aacbe	68	while (loops-- != 0)
06f22bdb	69	caa_cpu_relax();
daddf5b0 MD	70	}
daddf5b0 MD	71
4bad7d45 MD	72	static int verbose_mode;
	73
	74	#define printf_verbose(fmt, args...) \
	75	do { \
	76	if (verbose_mode) \
	77	printf(fmt, args); \
	78	} while (0)
	79
2a7ac59d MD	80	static unsigned int cpu_affinities[NR_CPUS];
	81	static unsigned int next_aff = 0;
	82	static int use_affinity = 0;
	83
6af882ba MD	84	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	85
2a7ac59d MD	86	static void set_affinity(void)
2a7ac59d MD	87	{
95bc7fb9	88	#if HAVE_SCHED_SETAFFINITY
2a7ac59d	89	cpu_set_t mask;
95bc7fb9 MD	90	int cpu, ret;
95bc7fb9 MD	91	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	92
	93	if (!use_affinity)
	94	return;
	95
d8540fc5	96	#if HAVE_SCHED_SETAFFINITY
6af882ba MD	97	ret = pthread_mutex_lock(&affinity_mutex);
	98	if (ret) {
	99	perror("Error in pthread mutex lock");
	100	exit(-1);
	101	}
2a7ac59d	102	cpu = cpu_affinities[next_aff++];
6af882ba MD	103	ret = pthread_mutex_unlock(&affinity_mutex);
	104	if (ret) {
	105	perror("Error in pthread mutex unlock");
	106	exit(-1);
	107	}
2a7ac59d MD	108	CPU_ZERO(&mask);
	109	CPU_SET(cpu, &mask);
	110	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5	111	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	112	}
2a7ac59d MD	113
51299083 MD	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);
51299083	129
55271c13	130	static
06f22bdb	131	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13	132	static
06f22bdb	133	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;
51299083 MD	134
	135	static unsigned int nr_readers;
	136	static unsigned int nr_writers;
	137
	138	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	139
61c3fb60	140	static
51299083 MD	141	void thr_reader(void data)
	142	{
	143	unsigned long tidx = (unsigned long)data;
	144
94df6318 MD	145	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	146	"reader", urcu_get_thread_id());
51299083	147
2a7ac59d MD	148	set_affinity();
2a7ac59d MD	149
51299083 MD	150	while (!test_go)
	151	{
	152	}
	153
	154	for (;;) {
19d0e7ef MD	155	int v;
19d0e7ef MD	156
51299083	157	pthread_mutex_lock(&lock);
19d0e7ef MD	158	v = test_array.a;
19d0e7ef MD	159	assert(v == 8);
a0b7f7ea	160	if (caa_unlikely(rduration))
daddf5b0	161	loop_sleep(rduration);
51299083	162	pthread_mutex_unlock(&lock);
bd252a04	163	URCU_TLS(nr_reads)++;
a0b7f7ea	164	if (caa_unlikely(!test_duration_read()))
51299083 MD	165	break;
	166	}
	167
bd252a04	168	tot_nr_reads[tidx] = URCU_TLS(nr_reads);
94df6318 MD	169	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	170	"reader", urcu_get_thread_id());
51299083 MD	171	return ((void*)1);
	172
	173	}
	174
61c3fb60	175	static
51299083 MD	176	void thr_writer(void data)
	177	{
	178	unsigned long wtidx = (unsigned long)data;
	179
94df6318 MD	180	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	181	"writer", urcu_get_thread_id());
51299083	182
2a7ac59d MD	183	set_affinity();
2a7ac59d MD	184
51299083 MD	185	while (!test_go)
	186	{
	187	}
5481ddb3	188	cmm_smp_mb();
51299083 MD	189
	190	for (;;) {
	191	pthread_mutex_lock(&lock);
	192	test_array.a = 0;
	193	test_array.a = 8;
a0b7f7ea	194	if (caa_unlikely(wduration))
31b598e0	195	loop_sleep(wduration);
51299083	196	pthread_mutex_unlock(&lock);
bd252a04	197	URCU_TLS(nr_writes)++;
a0b7f7ea	198	if (caa_unlikely(!test_duration_write()))
51299083	199	break;
a0b7f7ea	200	if (caa_unlikely(wdelay))
9e31d0f0	201	loop_sleep(wdelay);
51299083 MD	202	}
51299083 MD	203
94df6318 MD	204	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	205	"writer", urcu_get_thread_id());
bd252a04	206	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
51299083 MD	207	return ((void*)2);
	208	}
	209
61c3fb60	210	static
51299083 MD	211	void show_usage(int argc, char **argv)
51299083 MD	212	{
06637138 MD	213	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	214	argv[0]);
	215	printf("OPTIONS:\n");
06637138 MD	216	printf(" [-d delay] (writer period (us))\n");
	217	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	218	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	219	printf(" [-v] (verbose output)\n");
	220	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
51299083 MD	221	printf("\n");
	222	}
	223
51299083 MD	224	int main(int argc, char **argv)
	225	{
	226	int err;
	227	pthread_t tid_reader, tid_writer;
	228	void *tret;
	229	unsigned long long count_reader, count_writer;
	230	unsigned long long tot_reads = 0, tot_writes = 0;
	231	int i, a;
83e334d0	232	unsigned int i_thr;
51299083 MD	233
	234	if (argc < 4) {
	235	show_usage(argc, argv);
	236	return -1;
	237	}
5481ddb3	238	cmm_smp_mb();
51299083 MD	239
	240	err = sscanf(argv[1], "%u", &nr_readers);
	241	if (err != 1) {
	242	show_usage(argc, argv);
	243	return -1;
	244	}
	245
	246	err = sscanf(argv[2], "%u", &nr_writers);
	247	if (err != 1) {
	248	show_usage(argc, argv);
	249	return -1;
	250	}
83e334d0	251
51299083 MD	252	err = sscanf(argv[3], "%lu", &duration);
	253	if (err != 1) {
	254	show_usage(argc, argv);
	255	return -1;
	256	}
	257
51299083 MD	258	for (i = 4; i < argc; i++) {
	259	if (argv[i][0] != '-')
	260	continue;
	261	switch (argv[i][1]) {
51299083 MD	262	case 'a':
	263	if (argc < i + 2) {
	264	show_usage(argc, argv);
	265	return -1;
	266	}
	267	a = atoi(argv[++i]);
2a7ac59d	268	cpu_affinities[next_aff++] = a;
51299083	269	use_affinity = 1;
4bad7d45	270	printf_verbose("Adding CPU %d affinity\n", a);
51299083	271	break;
8b632bab MD	272	case 'c':
	273	if (argc < i + 2) {
	274	show_usage(argc, argv);
	275	return -1;
	276	}
9e31d0f0	277	rduration = atol(argv[++i]);
8b632bab	278	break;
51299083 MD	279	case 'd':
	280	if (argc < i + 2) {
	281	show_usage(argc, argv);
	282	return -1;
	283	}
9e31d0f0	284	wdelay = atol(argv[++i]);
51299083	285	break;
31b598e0 MD	286	case 'e':
	287	if (argc < i + 2) {
	288	show_usage(argc, argv);
	289	return -1;
	290	}
	291	wduration = atol(argv[++i]);
	292	break;
4bad7d45 MD	293	case 'v':
	294	verbose_mode = 1;
	295	break;
51299083 MD	296	}
	297	}
	298
4bad7d45	299	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
51299083	300	duration, nr_readers, nr_writers);
9e31d0f0	301	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45	302	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	303	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	304	"main", urcu_get_thread_id());
51299083	305
9aa14175 MD	306	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	307	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	308	count_reader = calloc(nr_readers, sizeof(*count_reader));
	309	count_writer = calloc(nr_writers, sizeof(*count_writer));
	310	tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads));
	311	tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
51299083	312
2a7ac59d MD	313	next_aff = 0;
2a7ac59d MD	314
83e334d0 MJ	315	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
	316	err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
	317	(void *)(long)i_thr);
51299083 MD	318	if (err != 0)
	319	exit(1);
	320	}
83e334d0 MJ	321	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
	322	err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
	323	(void *)(long)i_thr);
51299083 MD	324	if (err != 0)
	325	exit(1);
	326	}
	327
5481ddb3	328	cmm_smp_mb();
51299083 MD	329
	330	test_go = 1;
	331
	332	sleep(duration);
	333
	334	test_stop = 1;
	335
83e334d0 MJ	336	for (i_thr = 0; i_thr < nr_readers; i_thr++) {
83e334d0 MJ	337	err = pthread_join(tid_reader[i_thr], &tret);
51299083 MD	338	if (err != 0)
51299083 MD	339	exit(1);
83e334d0	340	tot_reads += tot_nr_reads[i_thr];
51299083	341	}
83e334d0 MJ	342	for (i_thr = 0; i_thr < nr_writers; i_thr++) {
83e334d0 MJ	343	err = pthread_join(tid_writer[i_thr], &tret);
51299083 MD	344	if (err != 0)
51299083 MD	345	exit(1);
83e334d0	346	tot_writes += tot_nr_writes[i_thr];
51299083	347	}
4bad7d45 MD	348
4bad7d45 MD	349	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
51299083	350	tot_writes);
a50a7b43	351	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	352	"nr_writers %3u "
9e31d0f0	353	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	354	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	355	nr_writers, wdelay, tot_reads, tot_writes,
	356	tot_reads + tot_writes);
	357
51299083 MD	358	free(tid_reader);
	359	free(tid_writer);
	360	free(count_reader);
	361	free(count_writer);
	362	free(tot_nr_reads);
	363	free(tot_nr_writes);
	364	return 0;
	365	}