[userspace-rcu.git] / tests / test_perthreadlock.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 <sched.h>
#include <errno.h>

#include <urcu/arch.h>

#ifdef __linux__
#include <syscall.h>
#endif

/* 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>

struct test_array {
	int a;
};

struct per_thread_lock {
	pthread_mutex_t lock;
} __attribute__((aligned(CAA_CACHE_LINE_SIZE)));	/* cache-line aligned */

static struct per_thread_lock *per_thread_lock;

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 l)
{
	while(l-- != 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;

#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(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;

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 *data)
{
	unsigned long tidx = (unsigned long)data;

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

	set_affinity();

	while (!test_go)
	{
	}

	for (;;) {
		pthread_mutex_lock(&per_thread_lock[tidx].lock);
		assert(test_array.a == 8);
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
		pthread_mutex_unlock(&per_thread_lock[tidx].lock);
		nr_reads++;
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	tot_nr_reads[tidx] = 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 *data)
{
	unsigned long wtidx = (unsigned long)data;
	long tidx;

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

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		for (tidx = 0; tidx < nr_readers; tidx++) {
			pthread_mutex_lock(&per_thread_lock[tidx].lock);
		}
		test_array.a = 0;
		test_array.a = 8;
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
			pthread_mutex_unlock(&per_thread_lock[tidx].lock);
		}
		nr_writes++;
		if (caa_unlikely(!test_duration_write()))
			break;
		if (caa_unlikely(wdelay))
			loop_sleep(wdelay);
	}

	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(" [-e duration] (writer 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, *count_writer;
	unsigned long long tot_reads = 0, tot_writes = 0;
	int i, a;

	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]) {
#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 '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, 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);
	count_writer = malloc(sizeof(*count_writer) * nr_writers);
	tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
	tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
	per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers);

	next_aff = 0;

	for (i = 0; i < nr_readers; i++) {
		err = pthread_create(&tid_reader[i], NULL, thr_reader,
				     (void *)(long)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);
	}

	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 += tot_nr_reads[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 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);
	free(per_thread_lock);
	return 0;
}
Commit	Line	Data
0ee8bb0a 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>
0ee8bb0a 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
9e97e478	23	#define _GNU_SOURCE
d8540fc5	24	#include "../config.h"
0ee8bb0a 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>
9e97e478	34	#include <sched.h>
94b343fd	35	#include <errno.h>
0ee8bb0a	36
ec4e58a3	37	#include <urcu/arch.h>
0ee8bb0a	38
65fcc7e9 MD	39	#ifdef __linux__
	40	#include <syscall.h>
	41	#endif
	42
2a7ac59d MD	43	/* hardcoded number of CPUs */
	44	#define NR_CPUS 16384
	45
0ee8bb0a MD	46	#if defined(_syscall0)
	47	_syscall0(pid_t, gettid)
	48	#elif defined(__NR_gettid)
	49	static inline pid_t gettid(void)
	50	{
	51	return syscall(__NR_gettid);
	52	}
	53	#else
	54	#warning "use pid as tid"
	55	static inline pid_t gettid(void)
	56	{
	57	return getpid();
	58	}
	59	#endif
	60
	61	#ifndef DYNAMIC_LINK_TEST
	62	#define _LGPL_SOURCE
	63	#else
	64	#define debug_yield_read()
	65	#endif
ec4e58a3	66	#include <urcu.h>
0ee8bb0a MD	67
	68	struct test_array {
	69	int a;
	70	};
	71
	72	struct per_thread_lock {
	73	pthread_mutex_t lock;
06f22bdb	74	} __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
0ee8bb0a MD	75
	76	static struct per_thread_lock *per_thread_lock;
	77
78efb485	78	static volatile int test_go, test_stop;
0ee8bb0a	79
9e31d0f0	80	static unsigned long wdelay;
0ee8bb0a	81
2b4e4125	82	static volatile struct test_array test_array = { 8 };
0ee8bb0a MD	83
0ee8bb0a MD	84	static unsigned long duration;
0ee8bb0a	85
daddf5b0	86	/* read-side C.S. duration, in loops */
8b632bab MD	87	static unsigned long rduration;
8b632bab MD	88
31b598e0 MD	89	/* write-side C.S. duration, in loops */
	90	static unsigned long wduration;
	91
daddf5b0 MD	92	static inline void loop_sleep(unsigned long l)
	93	{
	94	while(l-- != 0)
06f22bdb	95	caa_cpu_relax();
daddf5b0 MD	96	}
daddf5b0 MD	97
4bad7d45 MD	98	static int verbose_mode;
	99
	100	#define printf_verbose(fmt, args...) \
	101	do { \
	102	if (verbose_mode) \
	103	printf(fmt, args); \
	104	} while (0)
	105
2a7ac59d MD	106	static unsigned int cpu_affinities[NR_CPUS];
	107	static unsigned int next_aff = 0;
	108	static int use_affinity = 0;
	109
6af882ba MD	110	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	111
d8540fc5 PA	112	#ifndef HAVE_CPU_SET_T
	113	typedef unsigned long cpu_set_t;
	114	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	115	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	116	#endif
	117
2a7ac59d MD	118	static void set_affinity(void)
	119	{
	120	cpu_set_t mask;
	121	int cpu;
6af882ba	122	int ret;
2a7ac59d MD	123
	124	if (!use_affinity)
	125	return;
	126
d8540fc5	127	#if HAVE_SCHED_SETAFFINITY
6af882ba MD	128	ret = pthread_mutex_lock(&affinity_mutex);
	129	if (ret) {
	130	perror("Error in pthread mutex lock");
	131	exit(-1);
	132	}
2a7ac59d	133	cpu = cpu_affinities[next_aff++];
6af882ba MD	134	ret = pthread_mutex_unlock(&affinity_mutex);
	135	if (ret) {
	136	perror("Error in pthread mutex unlock");
	137	exit(-1);
	138	}
2a7ac59d MD	139	CPU_ZERO(&mask);
2a7ac59d MD	140	CPU_SET(cpu, &mask);
d8540fc5 PA	141	#if SCHED_SETAFFINITY_ARGS == 2
	142	sched_setaffinity(0, &mask);
	143	#else
2a7ac59d	144	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	145	#endif
d8540fc5 PA	146	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	147	}
2a7ac59d MD	148
0ee8bb0a MD	149	/*
	150	* returns 0 if test should end.
	151	*/
	152	static int test_duration_write(void)
	153	{
78efb485	154	return !test_stop;
0ee8bb0a MD	155	}
	156
	157	static int test_duration_read(void)
	158	{
78efb485	159	return !test_stop;
0ee8bb0a MD	160	}
	161
	162	static unsigned long long __thread nr_writes;
	163	static unsigned long long __thread nr_reads;
	164
55271c13	165	static
06f22bdb	166	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13	167	static
06f22bdb	168	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;
0ee8bb0a MD	169
	170	static unsigned int nr_readers;
	171	static unsigned int nr_writers;
	172
	173	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	174
	175	void rcu_copy_mutex_lock(void)
	176	{
	177	int ret;
	178	ret = pthread_mutex_lock(&rcu_copy_mutex);
	179	if (ret) {
	180	perror("Error in pthread mutex lock");
	181	exit(-1);
	182	}
	183	}
	184
	185	void rcu_copy_mutex_unlock(void)
	186	{
	187	int ret;
	188
	189	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	190	if (ret) {
	191	perror("Error in pthread mutex unlock");
	192	exit(-1);
	193	}
	194	}
	195
	196	void thr_reader(void data)
	197	{
	198	unsigned long tidx = (unsigned long)data;
	199
4bad7d45	200	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	201	"reader", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	202
2a7ac59d MD	203	set_affinity();
2a7ac59d MD	204
0ee8bb0a MD	205	while (!test_go)
	206	{
	207	}
	208
	209	for (;;) {
	210	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	211	assert(test_array.a == 8);
a0b7f7ea	212	if (caa_unlikely(rduration))
daddf5b0	213	loop_sleep(rduration);
0ee8bb0a MD	214	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
0ee8bb0a MD	215	nr_reads++;
a0b7f7ea	216	if (caa_unlikely(!test_duration_read()))
0ee8bb0a MD	217	break;
	218	}
	219
	220	tot_nr_reads[tidx] = nr_reads;
cda3c71d	221	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	222	"reader", pthread_self(), (unsigned long)gettid());
	223	return ((void*)1);
	224
	225	}
	226
	227	void thr_writer(void data)
	228	{
	229	unsigned long wtidx = (unsigned long)data;
	230	long tidx;
	231
4bad7d45	232	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	233	"writer", pthread_self(), (unsigned long)gettid());
0ee8bb0a MD	234
2a7ac59d MD	235	set_affinity();
2a7ac59d MD	236
0ee8bb0a MD	237	while (!test_go)
	238	{
	239	}
5481ddb3	240	cmm_smp_mb();
0ee8bb0a MD	241
	242	for (;;) {
	243	for (tidx = 0; tidx < nr_readers; tidx++) {
	244	pthread_mutex_lock(&per_thread_lock[tidx].lock);
	245	}
2b4e4125	246	test_array.a = 0;
0ee8bb0a	247	test_array.a = 8;
a0b7f7ea	248	if (caa_unlikely(wduration))
31b598e0	249	loop_sleep(wduration);
f120cc10	250	for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
0ee8bb0a MD	251	pthread_mutex_unlock(&per_thread_lock[tidx].lock);
	252	}
	253	nr_writes++;
a0b7f7ea	254	if (caa_unlikely(!test_duration_write()))
0ee8bb0a	255	break;
a0b7f7ea	256	if (caa_unlikely(wdelay))
9e31d0f0	257	loop_sleep(wdelay);
0ee8bb0a MD	258	}
0ee8bb0a MD	259
4bad7d45	260	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	261	"writer", pthread_self(), (unsigned long)gettid());
	262	tot_nr_writes[wtidx] = nr_writes;
	263	return ((void*)2);
	264	}
	265
	266	void show_usage(int argc, char **argv)
	267	{
	268	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	269	#ifdef DEBUG_YIELD
	270	printf(" [-r] [-w] (yield reader and/or writer)");
	271	#endif
	272	printf(" [-d delay] (writer period (us))");
daddf5b0	273	printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0	274	printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45	275	printf(" [-v] (verbose output)");
9e97e478	276	printf(" [-a cpu#] [-a cpu#]... (affinity)");
0ee8bb0a MD	277	printf("\n");
	278	}
	279
	280	int main(int argc, char **argv)
	281	{
	282	int err;
	283	pthread_t tid_reader, tid_writer;
	284	void *tret;
	285	unsigned long long count_reader, count_writer;
	286	unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478	287	int i, a;
0ee8bb0a MD	288
	289	if (argc < 4) {
	290	show_usage(argc, argv);
	291	return -1;
	292	}
5481ddb3	293	cmm_smp_mb();
0ee8bb0a MD	294
	295	err = sscanf(argv[1], "%u", &nr_readers);
	296	if (err != 1) {
	297	show_usage(argc, argv);
	298	return -1;
	299	}
	300
	301	err = sscanf(argv[2], "%u", &nr_writers);
	302	if (err != 1) {
	303	show_usage(argc, argv);
	304	return -1;
	305	}
	306
	307	err = sscanf(argv[3], "%lu", &duration);
	308	if (err != 1) {
	309	show_usage(argc, argv);
	310	return -1;
	311	}
	312
	313	for (i = 4; i < argc; i++) {
	314	if (argv[i][0] != '-')
	315	continue;
	316	switch (argv[i][1]) {
	317	#ifdef DEBUG_YIELD
	318	case 'r':
	319	yield_active \|= YIELD_READ;
	320	break;
	321	case 'w':
	322	yield_active \|= YIELD_WRITE;
	323	break;
	324	#endif
9e97e478 MD	325	case 'a':
	326	if (argc < i + 2) {
	327	show_usage(argc, argv);
	328	return -1;
	329	}
	330	a = atoi(argv[++i]);
2a7ac59d	331	cpu_affinities[next_aff++] = a;
9e97e478	332	use_affinity = 1;
4bad7d45	333	printf_verbose("Adding CPU %d affinity\n", a);
9e97e478	334	break;
8b632bab MD	335	case 'c':
	336	if (argc < i + 2) {
	337	show_usage(argc, argv);
	338	return -1;
	339	}
9e31d0f0	340	rduration = atol(argv[++i]);
8b632bab	341	break;
0ee8bb0a MD	342	case 'd':
	343	if (argc < i + 2) {
	344	show_usage(argc, argv);
	345	return -1;
	346	}
9e31d0f0	347	wdelay = atol(argv[++i]);
0ee8bb0a	348	break;
31b598e0 MD	349	case 'e':
	350	if (argc < i + 2) {
	351	show_usage(argc, argv);
	352	return -1;
	353	}
	354	wduration = atol(argv[++i]);
	355	break;
4bad7d45 MD	356	case 'v':
	357	verbose_mode = 1;
	358	break;
0ee8bb0a MD	359	}
	360	}
	361
4bad7d45	362	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a	363	duration, nr_readers, nr_writers);
9e31d0f0	364	printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 MD	365	printf_verbose("Reader duration : %lu loops.\n", rduration);
4bad7d45 MD	366	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
0ee8bb0a MD	367	"main", pthread_self(), (unsigned long)gettid());
	368
	369	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	370	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	371	count_reader = malloc(sizeof(count_reader) nr_readers);
	372	count_writer = malloc(sizeof(count_writer) nr_writers);
	373	tot_nr_reads = malloc(sizeof(tot_nr_reads) nr_readers);
	374	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	375	per_thread_lock = malloc(sizeof(per_thread_lock) nr_readers);
	376
2a7ac59d MD	377	next_aff = 0;
2a7ac59d MD	378
0ee8bb0a MD	379	for (i = 0; i < nr_readers; i++) {
	380	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	381	(void *)(long)i);
	382	if (err != 0)
	383	exit(1);
	384	}
	385	for (i = 0; i < nr_writers; i++) {
	386	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	387	(void *)(long)i);
	388	if (err != 0)
	389	exit(1);
	390	}
	391
5481ddb3	392	cmm_smp_mb();
0ee8bb0a	393
78efb485 MD	394	test_go = 1;
	395
	396	sleep(duration);
	397
	398	test_stop = 1;
	399
0ee8bb0a MD	400	for (i = 0; i < nr_readers; i++) {
	401	err = pthread_join(tid_reader[i], &tret);
	402	if (err != 0)
	403	exit(1);
	404	tot_reads += tot_nr_reads[i];
	405	}
	406	for (i = 0; i < nr_writers; i++) {
	407	err = pthread_join(tid_writer[i], &tret);
	408	if (err != 0)
	409	exit(1);
	410	tot_writes += tot_nr_writes[i];
	411	}
4bad7d45 MD	412
4bad7d45 MD	413	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a	414	tot_writes);
a50a7b43	415	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d	416	"nr_writers %3u "
9e31d0f0	417	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	418	argv[0], duration, nr_readers, rduration, wduration,
4bad7d45 MD	419	nr_writers, wdelay, tot_reads, tot_writes,
	420	tot_reads + tot_writes);
	421
0ee8bb0a MD	422	free(tid_reader);
	423	free(tid_writer);
	424	free(count_reader);
	425	free(count_writer);
	426	free(tot_nr_reads);
	427	free(tot_nr_writes);
	428	free(per_thread_lock);
	429	return 0;
	430	}