[urcu.git] / tests / test_urcu_gc.c

/*
 * test_urcu_gc.c
 *
 * Userspace RCU library - test program (with baatch 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 <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>

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 int reclaim_batch = 1;

struct reclaim_queue {
	void **queue;	/* Beginning of queue */
	void **head;	/* Insert position */
};

static struct reclaim_queue *pending_reclaims;

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;

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

	if (!use_affinity)
		return;

	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);
}

/*
 * 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 rcu_gc_clear_queue(unsigned long wtidx)
{
	void **p;

	/* Wait for Q.S and empty queue */
	synchronize_rcu();

	for (p = pending_reclaims[wtidx].queue;
			p < pending_reclaims[wtidx].head; p++) {
		/* poison */
		if (*p)
			((struct test_array *)*p)->a = 0;
		free(*p);
	}
	pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue;
}

/* Using per-thread queue */
static void rcu_gc_reclaim(unsigned long wtidx, void *old)
{
	/* Queue pointer */
	*pending_reclaims[wtidx].head = old;
	pending_reclaims[wtidx].head++;

	if (likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue
			< reclaim_batch))
		return;

	rcu_gc_clear_queue(wtidx);
}

void *thr_writer(void *data)
{
	unsigned long wtidx = (unsigned long)data;
#ifdef TEST_LOCAL_GC
	struct test_array *old = NULL;
#else
	struct test_array *new, *old;
#endif

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

	set_affinity();

	while (!test_go)
	{
	}
	smp_mb();

	for (;;) {
#ifndef TEST_LOCAL_GC
		new = malloc(sizeof(*new));
		new->a = 8;
		old = rcu_xchg_pointer(&test_rcu_pointer, new);
#endif
		rcu_gc_reclaim(wtidx, 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());
	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 'b':
			if (argc < i + 2) {
				show_usage(argc, argv);
				return -1;
			}
			reclaim_batch = atol(argv[++i]);
			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);
	pending_reclaims = malloc(sizeof(*pending_reclaims) * nr_writers);
	if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
			< CACHE_LINE_SIZE)
		for (i = 0; i < nr_writers; i++)
			pending_reclaims[i].queue = calloc(1, CACHE_LINE_SIZE);
	else
		for (i = 0; i < nr_writers; i++)
			pending_reclaims[i].queue = calloc(reclaim_batch,
					sizeof(*pending_reclaims[i].queue));
	for (i = 0; i < nr_writers; i++)
		pending_reclaims[i].head = pending_reclaims[i].queue;

	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];
		rcu_gc_clear_queue(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 "
		"batch %u\n",
		argv[0], duration, nr_readers, rduration,
		nr_writers, wdelay, tot_reads, tot_writes,
		tot_reads + tot_writes, reclaim_batch);
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(tot_nr_writes);
	for (i = 0; i < nr_writers; i++)
		free(pending_reclaims[i].queue);
	free(pending_reclaims);

	return 0;
}
Commit	Line	Data
a813abf8 MD	1	/*
	2	* test_urcu_gc.c
	3	*
	4	* Userspace RCU library - test program (with baatch 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
	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>
	34	#include <sched.h>
94b343fd	35	#include <errno.h>
a813abf8	36
ec4e58a3	37	#include <urcu/arch.h>
a813abf8	38
2a7ac59d MD	39	/* hardcoded number of CPUs */
	40	#define NR_CPUS 16384
	41
a813abf8 MD	42	#if defined(_syscall0)
	43	_syscall0(pid_t, gettid)
	44	#elif defined(__NR_gettid)
	45	static inline pid_t gettid(void)
	46	{
	47	return syscall(__NR_gettid);
	48	}
	49	#else
	50	#warning "use pid as tid"
	51	static inline pid_t gettid(void)
	52	{
	53	return getpid();
	54	}
	55	#endif
	56
	57	#ifndef DYNAMIC_LINK_TEST
	58	#define _LGPL_SOURCE
	59	#else
	60	#define debug_yield_read()
	61	#endif
ec4e58a3	62	#include <urcu.h>
a813abf8 MD	63
	64	struct test_array {
	65	int a;
	66	};
	67
	68	static volatile int test_go, test_stop;
	69
	70	static unsigned long wdelay;
	71
	72	static struct test_array *test_rcu_pointer;
	73
4a3e0004	74	static unsigned int reclaim_batch = 1;
a813abf8 MD	75
	76	struct reclaim_queue {
	77	void *queue; / Beginning of queue */
	78	void *head; / Insert position */
	79	};
	80
	81	static struct reclaim_queue *pending_reclaims;
	82
	83	static unsigned long duration;
	84
	85	/* read-side C.S. duration, in loops */
	86	static unsigned long rduration;
	87
	88	static inline void loop_sleep(unsigned long l)
	89	{
	90	while(l-- != 0)
	91	cpu_relax();
	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
2a7ac59d MD	102	static unsigned int cpu_affinities[NR_CPUS];
	103	static unsigned int next_aff = 0;
	104	static int use_affinity = 0;
	105
6af882ba MD	106	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	107
2a7ac59d MD	108	static void set_affinity(void)
	109	{
	110	cpu_set_t mask;
	111	int cpu;
6af882ba	112	int ret;
2a7ac59d MD	113
	114	if (!use_affinity)
	115	return;
	116
6af882ba MD	117	ret = pthread_mutex_lock(&affinity_mutex);
	118	if (ret) {
	119	perror("Error in pthread mutex lock");
	120	exit(-1);
	121	}
2a7ac59d	122	cpu = cpu_affinities[next_aff++];
6af882ba MD	123	ret = pthread_mutex_unlock(&affinity_mutex);
	124	if (ret) {
	125	perror("Error in pthread mutex unlock");
	126	exit(-1);
	127	}
2a7ac59d MD	128	CPU_ZERO(&mask);
	129	CPU_SET(cpu, &mask);
	130	sched_setaffinity(0, sizeof(mask), &mask);
	131	}
	132
a813abf8 MD	133	/*
	134	* returns 0 if test should end.
	135	*/
	136	static int test_duration_write(void)
	137	{
	138	return !test_stop;
	139	}
	140
	141	static int test_duration_read(void)
	142	{
	143	return !test_stop;
	144	}
	145
	146	static unsigned long long __thread nr_writes;
	147	static unsigned long long __thread nr_reads;
	148
	149	static
	150	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
	151
	152	static unsigned int nr_readers;
	153	static unsigned int nr_writers;
	154
	155	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	156
	157	void rcu_copy_mutex_lock(void)
	158	{
	159	int ret;
	160	ret = pthread_mutex_lock(&rcu_copy_mutex);
	161	if (ret) {
	162	perror("Error in pthread mutex lock");
	163	exit(-1);
	164	}
	165	}
	166
	167	void rcu_copy_mutex_unlock(void)
	168	{
	169	int ret;
	170
	171	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	172	if (ret) {
	173	perror("Error in pthread mutex unlock");
	174	exit(-1);
	175	}
	176	}
	177
	178	void thr_reader(void _count)
	179	{
	180	unsigned long long *count = _count;
	181	struct test_array *local_ptr;
	182
	183	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	184	"reader", pthread_self(), (unsigned long)gettid());
	185
2a7ac59d MD	186	set_affinity();
2a7ac59d MD	187
a813abf8 MD	188	rcu_register_thread();
	189
	190	while (!test_go)
	191	{
	192	}
	193	smp_mb();
	194
	195	for (;;) {
	196	rcu_read_lock();
	197	local_ptr = rcu_dereference(test_rcu_pointer);
	198	debug_yield_read();
	199	if (local_ptr)
	200	assert(local_ptr->a == 8);
	201	if (unlikely(rduration))
	202	loop_sleep(rduration);
	203	rcu_read_unlock();
	204	nr_reads++;
	205	if (unlikely(!test_duration_read()))
	206	break;
	207	}
	208
	209	rcu_unregister_thread();
	210
	211	*count = nr_reads;
	212	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	213	"reader", pthread_self(), (unsigned long)gettid());
	214	return ((void*)1);
	215
	216	}
	217
53091fe5	218	static void rcu_gc_clear_queue(unsigned long wtidx)
a813abf8 MD	219	{
	220	void **p;
	221
53091fe5	222	/* Wait for Q.S and empty queue */
a813abf8 MD	223	synchronize_rcu();
	224
	225	for (p = pending_reclaims[wtidx].queue;
	226	p < pending_reclaims[wtidx].head; p++) {
	227	/* poison */
	228	if (*p)
	229	((struct test_array )p)->a = 0;
	230	free(*p);
	231	}
	232	pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue;
	233	}
	234
53091fe5 MD	235	/* Using per-thread queue */
53091fe5 MD	236	static void rcu_gc_reclaim(unsigned long wtidx, void *old)
a813abf8	237	{
53091fe5 MD	238	/* Queue pointer */
	239	*pending_reclaims[wtidx].head = old;
	240	pending_reclaims[wtidx].head++;
a813abf8	241
53091fe5 MD	242	if (likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue
	243	< reclaim_batch))
	244	return;
a813abf8	245
53091fe5	246	rcu_gc_clear_queue(wtidx);
a813abf8 MD	247	}
	248
	249	void thr_writer(void data)
	250	{
	251	unsigned long wtidx = (unsigned long)data;
321e29d9 MD	252	#ifdef TEST_LOCAL_GC
	253	struct test_array *old = NULL;
	254	#else
a813abf8	255	struct test_array new, old;
321e29d9	256	#endif
a813abf8 MD	257
	258	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	259	"writer", pthread_self(), (unsigned long)gettid());
	260
2a7ac59d MD	261	set_affinity();
2a7ac59d MD	262
a813abf8 MD	263	while (!test_go)
	264	{
	265	}
	266	smp_mb();
	267
	268	for (;;) {
321e29d9	269	#ifndef TEST_LOCAL_GC
a813abf8	270	new = malloc(sizeof(*new));
a813abf8 MD	271	new->a = 8;
a813abf8 MD	272	old = rcu_xchg_pointer(&test_rcu_pointer, new);
321e29d9	273	#endif
a813abf8 MD	274	rcu_gc_reclaim(wtidx, old);
	275	nr_writes++;
	276	if (unlikely(!test_duration_write()))
	277	break;
	278	if (unlikely(wdelay))
	279	loop_sleep(wdelay);
	280	}
	281
	282	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	283	"writer", pthread_self(), (unsigned long)gettid());
	284	tot_nr_writes[wtidx] = nr_writes;
	285	return ((void*)2);
	286	}
	287
	288	void show_usage(int argc, char **argv)
	289	{
	290	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	291	#ifdef DEBUG_YIELD
	292	printf(" [-r] [-w] (yield reader and/or writer)");
	293	#endif
	294	printf(" [-d delay] (writer period (us))");
	295	printf(" [-c duration] (reader C.S. duration (in loops))");
	296	printf(" [-v] (verbose output)");
	297	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	298	printf("\n");
	299	}
	300
a813abf8 MD	301	int main(int argc, char **argv)
	302	{
	303	int err;
	304	pthread_t tid_reader, tid_writer;
	305	void *tret;
	306	unsigned long long *count_reader;
	307	unsigned long long tot_reads = 0, tot_writes = 0;
	308	int i, a;
a813abf8 MD	309
	310	if (argc < 4) {
	311	show_usage(argc, argv);
	312	return -1;
	313	}
	314
	315	err = sscanf(argv[1], "%u", &nr_readers);
	316	if (err != 1) {
	317	show_usage(argc, argv);
	318	return -1;
	319	}
	320
	321	err = sscanf(argv[2], "%u", &nr_writers);
	322	if (err != 1) {
	323	show_usage(argc, argv);
	324	return -1;
	325	}
	326
	327	err = sscanf(argv[3], "%lu", &duration);
	328	if (err != 1) {
	329	show_usage(argc, argv);
	330	return -1;
	331	}
	332
a813abf8 MD	333	for (i = 4; i < argc; i++) {
	334	if (argv[i][0] != '-')
	335	continue;
	336	switch (argv[i][1]) {
	337	#ifdef DEBUG_YIELD
	338	case 'r':
	339	yield_active \|= YIELD_READ;
	340	break;
	341	case 'w':
	342	yield_active \|= YIELD_WRITE;
	343	break;
	344	#endif
	345	case 'a':
	346	if (argc < i + 2) {
	347	show_usage(argc, argv);
	348	return -1;
	349	}
	350	a = atoi(argv[++i]);
2a7ac59d	351	cpu_affinities[next_aff++] = a;
a813abf8 MD	352	use_affinity = 1;
	353	printf_verbose("Adding CPU %d affinity\n", a);
	354	break;
	355	case 'b':
	356	if (argc < i + 2) {
	357	show_usage(argc, argv);
	358	return -1;
	359	}
	360	reclaim_batch = atol(argv[++i]);
	361	break;
	362	case 'c':
	363	if (argc < i + 2) {
	364	show_usage(argc, argv);
	365	return -1;
	366	}
	367	rduration = atol(argv[++i]);
	368	break;
	369	case 'd':
	370	if (argc < i + 2) {
	371	show_usage(argc, argv);
	372	return -1;
	373	}
	374	wdelay = atol(argv[++i]);
	375	break;
	376	case 'v':
	377	verbose_mode = 1;
	378	break;
	379	}
	380	}
	381
	382	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	383	duration, nr_readers, nr_writers);
	384	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	385	printf_verbose("Reader duration : %lu loops.\n", rduration);
	386	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
	387	"main", pthread_self(), (unsigned long)gettid());
	388
a813abf8 MD	389	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	390	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	391	count_reader = malloc(sizeof(count_reader) nr_readers);
	392	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	393	pending_reclaims = malloc(sizeof(pending_reclaims) nr_writers);
	394	if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
	395	< CACHE_LINE_SIZE)
	396	for (i = 0; i < nr_writers; i++)
	397	pending_reclaims[i].queue = calloc(1, CACHE_LINE_SIZE);
	398	else
	399	for (i = 0; i < nr_writers; i++)
	400	pending_reclaims[i].queue = calloc(reclaim_batch,
	401	sizeof(*pending_reclaims[i].queue));
	402	for (i = 0; i < nr_writers; i++)
	403	pending_reclaims[i].head = pending_reclaims[i].queue;
	404
2a7ac59d MD	405	next_aff = 0;
2a7ac59d MD	406
a813abf8 MD	407	for (i = 0; i < nr_readers; i++) {
	408	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	409	&count_reader[i]);
	410	if (err != 0)
	411	exit(1);
	412	}
	413	for (i = 0; i < nr_writers; i++) {
	414	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	415	(void *)(long)i);
	416	if (err != 0)
	417	exit(1);
	418	}
	419
	420	smp_mb();
	421
	422	test_go = 1;
	423
	424	sleep(duration);
	425
	426	test_stop = 1;
	427
	428	for (i = 0; i < nr_readers; i++) {
	429	err = pthread_join(tid_reader[i], &tret);
	430	if (err != 0)
	431	exit(1);
	432	tot_reads += count_reader[i];
	433	}
	434	for (i = 0; i < nr_writers; i++) {
	435	err = pthread_join(tid_writer[i], &tret);
	436	if (err != 0)
	437	exit(1);
	438	tot_writes += tot_nr_writes[i];
53091fe5	439	rcu_gc_clear_queue(i);
a813abf8 MD	440	}
	441
	442	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	443	tot_writes);
	444	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
	445	"nr_writers %3u "
4a3e0004 MD	446	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
4a3e0004 MD	447	"batch %u\n",
a813abf8 MD	448	argv[0], duration, nr_readers, rduration,
a813abf8 MD	449	nr_writers, wdelay, tot_reads, tot_writes,
4a3e0004	450	tot_reads + tot_writes, reclaim_batch);
a813abf8 MD	451	free(tid_reader);
	452	free(tid_writer);
	453	free(count_reader);
	454	free(tot_nr_writes);
	455	for (i = 0; i < nr_writers; i++)
	456	free(pending_reclaims[i].queue);
	457	free(pending_reclaims);
	458
	459	return 0;
	460	}