[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@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>
#include <urcu/tls-compat.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 rcu_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;

/* 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;

#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)
{
#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 long long __attribute__((aligned(CAA_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", (unsigned long) pthread_self(),
			(unsigned long) gettid());

	set_affinity();

	rcu_register_thread();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		rcu_read_lock();
		local_ptr = rcu_dereference(test_rcu_pointer);
		rcu_debug_yield_read();
		if (local_ptr)
			assert(local_ptr->a == 8);
		if (caa_unlikely(rduration))
			loop_sleep(rduration);
		rcu_read_unlock();
		URCU_TLS(nr_reads)++;
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	rcu_unregister_thread();

	*count = URCU_TLS(nr_reads);
	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"reader", (unsigned long) 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;
	int ret;

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

	set_affinity();

	ret = rcu_defer_register_thread();
	if (ret) {
		printf("Error in rcu_defer_register_thread\n");
		exit(-1);
	}

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
		new = malloc(sizeof(*new));
		new->a = 8;
		old = rcu_xchg_pointer(&test_rcu_pointer, new);
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		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);
		URCU_TLS(nr_writes)++;
		if (caa_unlikely(!test_duration_write()))
			break;
		if (caa_unlikely(wdelay))
			loop_sleep(wdelay);
	}

	rcu_defer_unregister_thread();

	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
			"writer", (unsigned long) pthread_self(),
			(unsigned long) gettid());
	tot_nr_writes[wtidx] = URCU_TLS(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;
	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':
			rcu_yield_active |= RCU_YIELD_READ;
			break;
		case 'w':
			rcu_yield_active |= RCU_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", (unsigned long) 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);
	}

	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 += 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(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	*
6982d6d7	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
90075a50 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
	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>
90075a50	34	#include <sched.h>
94b343fd	35	#include <errno.h>
90075a50	36
ec4e58a3	37	#include <urcu/arch.h>
bd252a04	38	#include <urcu/tls-compat.h>
90075a50	39
65fcc7e9 MD	40	#ifdef __linux__
	41	#include <syscall.h>
	42	#endif
	43
90075a50 MD	44	/* hardcoded number of CPUs */
	45	#define NR_CPUS 16384
	46
	47	#if defined(_syscall0)
	48	_syscall0(pid_t, gettid)
	49	#elif defined(__NR_gettid)
	50	static inline pid_t gettid(void)
	51	{
	52	return syscall(__NR_gettid);
	53	}
	54	#else
	55	#warning "use pid as tid"
	56	static inline pid_t gettid(void)
	57	{
	58	return getpid();
	59	}
	60	#endif
	61
	62	#ifndef DYNAMIC_LINK_TEST
	63	#define _LGPL_SOURCE
	64	#else
1de4df4b	65	#define rcu_debug_yield_read()
90075a50	66	#endif
ec4e58a3 MD	67	#include <urcu.h>
ec4e58a3 MD	68	#include <urcu-defer.h>
90075a50 MD	69
	70	struct test_array {
	71	int a;
	72	};
	73
	74	static volatile int test_go, test_stop;
	75
	76	static unsigned long wdelay;
	77
	78	static struct test_array *test_rcu_pointer;
	79
	80	static unsigned long duration;
	81
	82	/* read-side C.S. duration, in loops */
	83	static unsigned long rduration;
	84
31b598e0 MD	85	/* write-side C.S. duration, in loops */
	86	static unsigned long wduration;
	87
ab0aacbe	88	static inline void loop_sleep(unsigned long loops)
90075a50	89	{
ab0aacbe	90	while (loops-- != 0)
06f22bdb	91	caa_cpu_relax();
90075a50 MD	92	}
	93
	94	static int verbose_mode;
	95
	96	#define printf_verbose(fmt, args...) \
	97	do { \
	98	if (verbose_mode) \
	99	printf(fmt, args); \
	100	} while (0)
	101
	102	static unsigned int cpu_affinities[NR_CPUS];
	103	static unsigned int next_aff = 0;
	104	static int use_affinity = 0;
	105
	106	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	107
d8540fc5 PA	108	#ifndef HAVE_CPU_SET_T
	109	typedef unsigned long cpu_set_t;
	110	# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
	111	# define CPU_SET(cpu, cpuset) do { *(cpuset) \|= (1UL << (cpu)); } while(0)
	112	#endif
	113
90075a50 MD	114	static void set_affinity(void)
90075a50 MD	115	{
95bc7fb9	116	#if HAVE_SCHED_SETAFFINITY
90075a50	117	cpu_set_t mask;
95bc7fb9 MD	118	int cpu, ret;
95bc7fb9 MD	119	#endif /* HAVE_SCHED_SETAFFINITY */
90075a50 MD	120
	121	if (!use_affinity)
	122	return;
	123
d8540fc5	124	#if HAVE_SCHED_SETAFFINITY
90075a50 MD	125	ret = pthread_mutex_lock(&affinity_mutex);
	126	if (ret) {
	127	perror("Error in pthread mutex lock");
	128	exit(-1);
	129	}
	130	cpu = cpu_affinities[next_aff++];
	131	ret = pthread_mutex_unlock(&affinity_mutex);
	132	if (ret) {
	133	perror("Error in pthread mutex unlock");
	134	exit(-1);
	135	}
d8540fc5	136
90075a50 MD	137	CPU_ZERO(&mask);
90075a50 MD	138	CPU_SET(cpu, &mask);
d8540fc5 PA	139	#if SCHED_SETAFFINITY_ARGS == 2
	140	sched_setaffinity(0, &mask);
	141	#else
90075a50	142	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	143	#endif
d8540fc5 PA	144	#endif /* HAVE_SCHED_SETAFFINITY */
90075a50 MD	145	}
	146
	147	/*
	148	* returns 0 if test should end.
	149	*/
	150	static int test_duration_write(void)
	151	{
	152	return !test_stop;
	153	}
	154
	155	static int test_duration_read(void)
	156	{
	157	return !test_stop;
	158	}
	159
bd252a04 MD	160	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	161	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
90075a50 MD	162
90075a50 MD	163	static
06f22bdb	164	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
90075a50 MD	165
	166	static unsigned int nr_readers;
	167	static unsigned int nr_writers;
	168
	169	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	170
	171	void rcu_copy_mutex_lock(void)
	172	{
	173	int ret;
	174	ret = pthread_mutex_lock(&rcu_copy_mutex);
	175	if (ret) {
	176	perror("Error in pthread mutex lock");
	177	exit(-1);
	178	}
	179	}
	180
	181	void rcu_copy_mutex_unlock(void)
	182	{
	183	int ret;
	184
	185	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	186	if (ret) {
	187	perror("Error in pthread mutex unlock");
	188	exit(-1);
	189	}
	190	}
	191
	192	void thr_reader(void _count)
	193	{
	194	unsigned long long *count = _count;
	195	struct test_array *local_ptr;
	196
	197	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	198	"reader", (unsigned long) pthread_self(),
6ff854ac MD	199	(unsigned long) gettid());
90075a50 MD	200
	201	set_affinity();
	202
	203	rcu_register_thread();
	204
	205	while (!test_go)
	206	{
	207	}
5481ddb3	208	cmm_smp_mb();
90075a50 MD	209
	210	for (;;) {
	211	rcu_read_lock();
	212	local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b	213	rcu_debug_yield_read();
90075a50 MD	214	if (local_ptr)
90075a50 MD	215	assert(local_ptr->a == 8);
a0b7f7ea	216	if (caa_unlikely(rduration))
90075a50 MD	217	loop_sleep(rduration);
90075a50 MD	218	rcu_read_unlock();
bd252a04	219	URCU_TLS(nr_reads)++;
a0b7f7ea	220	if (caa_unlikely(!test_duration_read()))
90075a50 MD	221	break;
	222	}
	223
	224	rcu_unregister_thread();
	225
bd252a04	226	*count = URCU_TLS(nr_reads);
90075a50	227	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
6ff854ac MD	228	"reader", (unsigned long) pthread_self(),
6ff854ac MD	229	(unsigned long) gettid());
90075a50 MD	230	return ((void*)1);
	231
	232	}
	233
804b4375 MD	234	static void test_cb2(void *data)
	235	{
	236	}
	237
	238	static void test_cb1(void *data)
	239	{
	240	}
	241
90075a50 MD	242	void thr_writer(void data)
	243	{
	244	unsigned long wtidx = (unsigned long)data;
	245	struct test_array new, old = NULL;
6ade67d5	246	int ret;
90075a50 MD	247
90075a50 MD	248	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
6ff854ac MD	249	"writer", (unsigned long) pthread_self(),
6ff854ac MD	250	(unsigned long) gettid());
90075a50 MD	251
	252	set_affinity();
	253
6ade67d5 MD	254	ret = rcu_defer_register_thread();
	255	if (ret) {
	256	printf("Error in rcu_defer_register_thread\n");
	257	exit(-1);
	258	}
90075a50 MD	259
	260	while (!test_go)
	261	{
	262	}
5481ddb3	263	cmm_smp_mb();
90075a50 MD	264
	265	for (;;) {
	266	new = malloc(sizeof(*new));
	267	new->a = 8;
	268	old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea	269	if (caa_unlikely(wduration))
31b598e0	270	loop_sleep(wduration);
b4f313b7 MD	271	defer_rcu(free, old);
	272	defer_rcu(test_cb1, old);
	273	defer_rcu(test_cb1, (void *)-2L);
	274	defer_rcu(test_cb1, (void *)-2L);
	275	defer_rcu(test_cb1, old);
	276	defer_rcu(test_cb2, (void *)-2L);
	277	defer_rcu(test_cb2, (void *)-4L);
	278	defer_rcu(test_cb2, (void *)-2L);
bd252a04	279	URCU_TLS(nr_writes)++;
a0b7f7ea	280	if (caa_unlikely(!test_duration_write()))
90075a50	281	break;
a0b7f7ea	282	if (caa_unlikely(wdelay))
90075a50 MD	283	loop_sleep(wdelay);
	284	}
	285
786ee85b	286	rcu_defer_unregister_thread();
90075a50 MD	287
90075a50 MD	288	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
6ff854ac MD	289	"writer", (unsigned long) pthread_self(),
6ff854ac MD	290	(unsigned long) gettid());
bd252a04	291	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
90075a50 MD	292	return ((void*)2);
	293	}
	294
	295	void show_usage(int argc, char **argv)
	296	{
	297	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	298	#ifdef DEBUG_YIELD
	299	printf(" [-r] [-w] (yield reader and/or writer)");
	300	#endif
	301	printf(" [-d delay] (writer period (us))");
	302	printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0	303	printf(" [-e duration] (writer C.S. duration (in loops))");
90075a50 MD	304	printf(" [-v] (verbose output)");
	305	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	306	printf("\n");
	307	}
	308
	309	int main(int argc, char **argv)
	310	{
	311	int err;
	312	pthread_t tid_reader, tid_writer;
	313	void *tret;
	314	unsigned long long *count_reader;
	315	unsigned long long tot_reads = 0, tot_writes = 0;
	316	int i, a;
	317
	318	if (argc < 4) {
	319	show_usage(argc, argv);
	320	return -1;
	321	}
	322
	323	err = sscanf(argv[1], "%u", &nr_readers);
	324	if (err != 1) {
	325	show_usage(argc, argv);
	326	return -1;
	327	}
	328
	329	err = sscanf(argv[2], "%u", &nr_writers);
	330	if (err != 1) {
	331	show_usage(argc, argv);
	332	return -1;
	333	}
	334
	335	err = sscanf(argv[3], "%lu", &duration);
	336	if (err != 1) {
	337	show_usage(argc, argv);
	338	return -1;
	339	}
	340
	341	for (i = 4; i < argc; i++) {
	342	if (argv[i][0] != '-')
	343	continue;
	344	switch (argv[i][1]) {
	345	#ifdef DEBUG_YIELD
	346	case 'r':
1de4df4b	347	rcu_yield_active \|= RCU_YIELD_READ;
90075a50 MD	348	break;
90075a50 MD	349	case 'w':
1de4df4b	350	rcu_yield_active \|= RCU_YIELD_WRITE;
90075a50 MD	351	break;
	352	#endif
	353	case 'a':
	354	if (argc < i + 2) {
	355	show_usage(argc, argv);
	356	return -1;
	357	}
	358	a = atoi(argv[++i]);
	359	cpu_affinities[next_aff++] = a;
	360	use_affinity = 1;
	361	printf_verbose("Adding CPU %d affinity\n", a);
	362	break;
	363	case 'c':
	364	if (argc < i + 2) {
	365	show_usage(argc, argv);
	366	return -1;
	367	}
	368	rduration = atol(argv[++i]);
	369	break;
	370	case 'd':
	371	if (argc < i + 2) {
	372	show_usage(argc, argv);
	373	return -1;
	374	}
	375	wdelay = atol(argv[++i]);
	376	break;
31b598e0 MD	377	case 'e':
	378	if (argc < i + 2) {
	379	show_usage(argc, argv);
	380	return -1;
	381	}
	382	wduration = atol(argv[++i]);
	383	break;
90075a50 MD	384	case 'v':
	385	verbose_mode = 1;
	386	break;
	387	}
	388	}
	389
	390	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	391	duration, nr_readers, nr_writers);
	392	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	393	printf_verbose("Reader duration : %lu loops.\n", rduration);
	394	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
6ff854ac MD	395	"main", (unsigned long) pthread_self(),
6ff854ac MD	396	(unsigned long) gettid());
90075a50 MD	397
	398	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	399	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	400	count_reader = malloc(sizeof(count_reader) nr_readers);
	401	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	402
	403	next_aff = 0;
	404
	405	for (i = 0; i < nr_readers; i++) {
	406	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	407	&count_reader[i]);
	408	if (err != 0)
	409	exit(1);
	410	}
	411	for (i = 0; i < nr_writers; i++) {
	412	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	413	(void *)(long)i);
	414	if (err != 0)
	415	exit(1);
	416	}
	417
5481ddb3	418	cmm_smp_mb();
90075a50 MD	419
	420	test_go = 1;
	421
	422	sleep(duration);
	423
	424	test_stop = 1;
	425
	426	for (i = 0; i < nr_readers; i++) {
	427	err = pthread_join(tid_reader[i], &tret);
	428	if (err != 0)
	429	exit(1);
	430	tot_reads += count_reader[i];
	431	}
	432	for (i = 0; i < nr_writers; i++) {
	433	err = pthread_join(tid_writer[i], &tret);
	434	if (err != 0)
	435	exit(1);
	436	tot_writes += tot_nr_writes[i];
	437	}
	438
	439	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	440	tot_writes);
a50a7b43	441	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
90075a50 MD	442	"nr_writers %3u "
90075a50 MD	443	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43	444	argv[0], duration, nr_readers, rduration, wduration,
90075a50 MD	445	nr_writers, wdelay, tot_reads, tot_writes,
	446	tot_reads + tot_writes);
	447	free(tid_reader);
	448	free(tid_writer);
	449	free(count_reader);
	450	free(tot_nr_writes);
	451
	452	return 0;
	453	}