[urcu.git] / tests / benchmark / test_urcu_qsbr_gc.c

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

#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 "cpuset.h"
#include "thread-id.h"
#include "../common/debug-yield.h"

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

#define _LGPL_SOURCE
#include <urcu-qsbr.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 unsigned int reclaim_batch = 1;

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

static struct reclaim_queue *pending_reclaims;


/* 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);
#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 int nr_readers;
static unsigned int nr_writers;

pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
static
unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;


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

	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)++;
		/* QS each 1024 reads */
		if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
			_rcu_quiescent_state();
		if (caa_unlikely(!test_duration_read()))
			break;
	}

	rcu_unregister_thread();

	*count = URCU_TLS(nr_reads);
	printf_verbose("thread_end %s, tid %lu\n",
			"reader", urcu_get_thread_id());
	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 (caa_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, tid %lu\n",
			"writer", urcu_get_thread_id());

	set_affinity();

	while (!test_go)
	{
	}
	cmm_smp_mb();

	for (;;) {
#ifndef TEST_LOCAL_GC
		new = malloc(sizeof(*new));
		new->a = 8;
		old = _rcu_xchg_pointer(&test_rcu_pointer, new);
#endif
		if (caa_unlikely(wduration))
			loop_sleep(wduration);
		rcu_gc_reclaim(wtidx, old);
		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);
}

void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
		argv[0]);
	printf("OPTIONS:\n");
	printf("	[-r] [-w] (yield reader and/or writer)\n");
	printf("	[-b batch] (batch reclaim)\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;
	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]) {
		case 'r':
			rcu_debug_yield_enable(RCU_YIELD_READ);
			break;
		case 'w':
			rcu_debug_yield_enable(RCU_YIELD_WRITE);
			break;
		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 '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));
	tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
	pending_reclaims = calloc(nr_writers, sizeof(*pending_reclaims));
	if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
			< CAA_CACHE_LINE_SIZE)
		for (i = 0; i < nr_writers; i++)
			pending_reclaims[i].queue = calloc(1, CAA_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);
	}

	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];
		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 wdur %6lu "
		"nr_writers %3u "
		"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
		"batch %u\n",
		argv[0], duration, nr_readers, rduration, wduration,
		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
de10a585 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@efficios.com>
	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
de10a585 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>
de10a585 MD	32	#include <errno.h>
	33
	34	#include <urcu/arch.h>
bd252a04	35	#include <urcu/tls-compat.h>
2953b501	36	#include "cpuset.h"
94df6318	37	#include "thread-id.h"
2650042a	38	#include "../common/debug-yield.h"
de10a585 MD	39
	40	/* hardcoded number of CPUs */
	41	#define NR_CPUS 16384
	42
de10a585 MD	43	#define _LGPL_SOURCE
	44	#include <urcu-qsbr.h>
	45
	46	struct test_array {
	47	int a;
	48	};
	49
	50	static volatile int test_go, test_stop;
	51
	52	static unsigned long wdelay;
	53
	54	static struct test_array *test_rcu_pointer;
	55
	56	static unsigned long duration;
	57
	58	/* read-side C.S. duration, in loops */
	59	static unsigned long rduration;
	60	static unsigned int reclaim_batch = 1;
	61
	62	struct reclaim_queue {
	63	void *queue; / Beginning of queue */
	64	void *head; / Insert position */
	65	};
	66
	67	static struct reclaim_queue *pending_reclaims;
	68
	69
	70	/* write-side C.S. duration, in loops */
	71	static unsigned long wduration;
	72
ab0aacbe	73	static inline void loop_sleep(unsigned long loops)
de10a585	74	{
ab0aacbe	75	while (loops-- != 0)
de10a585 MD	76	caa_cpu_relax();
	77	}
	78
	79	static int verbose_mode;
	80
	81	#define printf_verbose(fmt, args...) \
	82	do { \
	83	if (verbose_mode) \
	84	printf(fmt, args); \
	85	} while (0)
	86
	87	static unsigned int cpu_affinities[NR_CPUS];
	88	static unsigned int next_aff = 0;
	89	static int use_affinity = 0;
	90
	91	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	92
de10a585 MD	93	static void set_affinity(void)
de10a585 MD	94	{
95bc7fb9	95	#if HAVE_SCHED_SETAFFINITY
de10a585	96	cpu_set_t mask;
95bc7fb9 MD	97	int cpu, ret;
95bc7fb9 MD	98	#endif /* HAVE_SCHED_SETAFFINITY */
de10a585 MD	99
	100	if (!use_affinity)
	101	return;
	102
	103	#if HAVE_SCHED_SETAFFINITY
	104	ret = pthread_mutex_lock(&affinity_mutex);
	105	if (ret) {
	106	perror("Error in pthread mutex lock");
	107	exit(-1);
	108	}
	109	cpu = cpu_affinities[next_aff++];
	110	ret = pthread_mutex_unlock(&affinity_mutex);
	111	if (ret) {
	112	perror("Error in pthread mutex unlock");
	113	exit(-1);
	114	}
	115
	116	CPU_ZERO(&mask);
	117	CPU_SET(cpu, &mask);
	118	#if SCHED_SETAFFINITY_ARGS == 2
	119	sched_setaffinity(0, &mask);
	120	#else
	121	sched_setaffinity(0, sizeof(mask), &mask);
	122	#endif
	123	#endif /* HAVE_SCHED_SETAFFINITY */
	124	}
	125
	126	/*
	127	* returns 0 if test should end.
	128	*/
	129	static int test_duration_write(void)
	130	{
	131	return !test_stop;
	132	}
	133
	134	static int test_duration_read(void)
	135	{
	136	return !test_stop;
	137	}
	138
bd252a04 MD	139	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	140	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
de10a585 MD	141
	142	static unsigned int nr_readers;
	143	static unsigned int nr_writers;
	144
	145	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	146	static
	147	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
	148
	149
	150	void rcu_copy_mutex_lock(void)
	151	{
	152	int ret;
	153	ret = pthread_mutex_lock(&rcu_copy_mutex);
	154	if (ret) {
	155	perror("Error in pthread mutex lock");
	156	exit(-1);
	157	}
	158	}
	159
	160	void rcu_copy_mutex_unlock(void)
	161	{
	162	int ret;
	163
	164	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	165	if (ret) {
	166	perror("Error in pthread mutex unlock");
	167	exit(-1);
	168	}
	169	}
	170
	171	void thr_reader(void _count)
	172	{
	173	unsigned long long *count = _count;
	174	struct test_array *local_ptr;
	175
94df6318 MD	176	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	177	"reader", urcu_get_thread_id());
de10a585 MD	178
	179	set_affinity();
	180
	181	rcu_register_thread();
	182
	183	while (!test_go)
	184	{
	185	}
	186	cmm_smp_mb();
	187
	188	for (;;) {
	189	_rcu_read_lock();
	190	local_ptr = _rcu_dereference(test_rcu_pointer);
1de4df4b	191	rcu_debug_yield_read();
de10a585 MD	192	if (local_ptr)
de10a585 MD	193	assert(local_ptr->a == 8);
a0b7f7ea	194	if (caa_unlikely(rduration))
de10a585 MD	195	loop_sleep(rduration);
de10a585 MD	196	_rcu_read_unlock();
bd252a04	197	URCU_TLS(nr_reads)++;
de10a585	198	/* QS each 1024 reads */
bd252a04	199	if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
de10a585	200	_rcu_quiescent_state();
a0b7f7ea	201	if (caa_unlikely(!test_duration_read()))
de10a585 MD	202	break;
	203	}
	204
	205	rcu_unregister_thread();
	206
bd252a04	207	*count = URCU_TLS(nr_reads);
94df6318 MD	208	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	209	"reader", urcu_get_thread_id());
de10a585 MD	210	return ((void*)1);
	211
	212	}
	213
	214	static void rcu_gc_clear_queue(unsigned long wtidx)
	215	{
	216	void **p;
	217
	218	/* Wait for Q.S and empty queue */
	219	synchronize_rcu();
	220
	221	for (p = pending_reclaims[wtidx].queue;
	222	p < pending_reclaims[wtidx].head; p++) {
	223	/* poison */
	224	if (*p)
	225	((struct test_array )p)->a = 0;
	226	free(*p);
	227	}
	228	pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue;
	229	}
	230
	231	/* Using per-thread queue */
	232	static void rcu_gc_reclaim(unsigned long wtidx, void *old)
	233	{
	234	/* Queue pointer */
	235	*pending_reclaims[wtidx].head = old;
	236	pending_reclaims[wtidx].head++;
	237
a0b7f7ea	238	if (caa_likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue
de10a585 MD	239	< reclaim_batch))
	240	return;
	241
	242	rcu_gc_clear_queue(wtidx);
	243	}
	244
	245	void thr_writer(void data)
	246	{
	247	unsigned long wtidx = (unsigned long)data;
	248	#ifdef TEST_LOCAL_GC
	249	struct test_array *old = NULL;
	250	#else
	251	struct test_array new, old;
	252	#endif
	253
94df6318 MD	254	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	255	"writer", urcu_get_thread_id());
de10a585 MD	256
	257	set_affinity();
	258
	259	while (!test_go)
	260	{
	261	}
	262	cmm_smp_mb();
	263
	264	for (;;) {
	265	#ifndef TEST_LOCAL_GC
	266	new = malloc(sizeof(*new));
	267	new->a = 8;
	268	old = _rcu_xchg_pointer(&test_rcu_pointer, new);
	269	#endif
a0b7f7ea	270	if (caa_unlikely(wduration))
de10a585 MD	271	loop_sleep(wduration);
de10a585 MD	272	rcu_gc_reclaim(wtidx, old);
bd252a04	273	URCU_TLS(nr_writes)++;
a0b7f7ea	274	if (caa_unlikely(!test_duration_write()))
de10a585	275	break;
a0b7f7ea	276	if (caa_unlikely(wdelay))
de10a585 MD	277	loop_sleep(wdelay);
	278	}
	279
94df6318 MD	280	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	281	"writer", urcu_get_thread_id());
bd252a04	282	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
de10a585 MD	283	return ((void*)2);
	284	}
	285
	286	void show_usage(int argc, char **argv)
	287	{
06637138 MD	288	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	289	argv[0]);
	290	printf("OPTIONS:\n");
06637138	291	printf(" [-r] [-w] (yield reader and/or writer)\n");
06637138 MD	292	printf(" [-b batch] (batch reclaim)\n");
	293	printf(" [-d delay] (writer period (us))\n");
	294	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	295	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	296	printf(" [-v] (verbose output)\n");
	297	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
de10a585 MD	298	printf("\n");
	299	}
	300
	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;
	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
	333	for (i = 4; i < argc; i++) {
	334	if (argv[i][0] != '-')
	335	continue;
	336	switch (argv[i][1]) {
de10a585	337	case 'r':
2650042a	338	rcu_debug_yield_enable(RCU_YIELD_READ);
de10a585 MD	339	break;
de10a585 MD	340	case 'w':
2650042a	341	rcu_debug_yield_enable(RCU_YIELD_WRITE);
de10a585	342	break;
de10a585 MD	343	case 'a':
	344	if (argc < i + 2) {
	345	show_usage(argc, argv);
	346	return -1;
	347	}
	348	a = atoi(argv[++i]);
	349	cpu_affinities[next_aff++] = a;
	350	use_affinity = 1;
	351	printf_verbose("Adding CPU %d affinity\n", a);
	352	break;
	353	case 'b':
	354	if (argc < i + 2) {
	355	show_usage(argc, argv);
	356	return -1;
	357	}
	358	reclaim_batch = atol(argv[++i]);
	359	break;
	360	case 'c':
	361	if (argc < i + 2) {
	362	show_usage(argc, argv);
	363	return -1;
	364	}
	365	rduration = atol(argv[++i]);
	366	break;
	367	case 'd':
	368	if (argc < i + 2) {
	369	show_usage(argc, argv);
	370	return -1;
	371	}
	372	wdelay = atol(argv[++i]);
	373	break;
	374	case 'e':
	375	if (argc < i + 2) {
	376	show_usage(argc, argv);
	377	return -1;
	378	}
	379	wduration = atol(argv[++i]);
	380	break;
	381	case 'v':
	382	verbose_mode = 1;
	383	break;
	384	}
	385	}
	386
	387	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	388	duration, nr_readers, nr_writers);
	389	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	390	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	391	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	392	"main", urcu_get_thread_id());
de10a585	393
9aa14175 MD	394	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	395	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	396	count_reader = calloc(nr_readers, sizeof(*count_reader));
	397	tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
	398	pending_reclaims = calloc(nr_writers, sizeof(*pending_reclaims));
de10a585 MD	399	if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
	400	< CAA_CACHE_LINE_SIZE)
	401	for (i = 0; i < nr_writers; i++)
	402	pending_reclaims[i].queue = calloc(1, CAA_CACHE_LINE_SIZE);
	403	else
	404	for (i = 0; i < nr_writers; i++)
	405	pending_reclaims[i].queue = calloc(reclaim_batch,
	406	sizeof(*pending_reclaims[i].queue));
	407	for (i = 0; i < nr_writers; i++)
	408	pending_reclaims[i].head = pending_reclaims[i].queue;
	409
	410	next_aff = 0;
	411
	412	for (i = 0; i < nr_readers; i++) {
	413	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	414	&count_reader[i]);
	415	if (err != 0)
	416	exit(1);
	417	}
	418	for (i = 0; i < nr_writers; i++) {
	419	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	420	(void *)(long)i);
	421	if (err != 0)
	422	exit(1);
	423	}
	424
	425	cmm_smp_mb();
	426
	427	test_go = 1;
	428
	429	sleep(duration);
	430
	431	test_stop = 1;
	432
	433	for (i = 0; i < nr_readers; i++) {
	434	err = pthread_join(tid_reader[i], &tret);
	435	if (err != 0)
	436	exit(1);
	437	tot_reads += count_reader[i];
	438	}
	439	for (i = 0; i < nr_writers; i++) {
	440	err = pthread_join(tid_writer[i], &tret);
	441	if (err != 0)
	442	exit(1);
	443	tot_writes += tot_nr_writes[i];
	444	rcu_gc_clear_queue(i);
	445	}
	446
	447	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	448	tot_writes);
	449	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
	450	"nr_writers %3u "
	451	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
	452	"batch %u\n",
	453	argv[0], duration, nr_readers, rduration, wduration,
	454	nr_writers, wdelay, tot_reads, tot_writes,
	455	tot_reads + tot_writes, reclaim_batch);
	456	free(tid_reader);
	457	free(tid_writer);
	458	free(count_reader);
	459	free(tot_nr_writes);
	460	for (i = 0; i < nr_writers; i++)
	461	free(pending_reclaims[i].queue);
	462	free(pending_reclaims);
463
464	return 0;
465	}