[urcu.git] / tests / test_qsbr_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 <urcu/arch.h>

/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
#define CACHE_LINE_SIZE 4096

/* 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

#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;


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 int nr_readers;
static unsigned int nr_writers;

pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
static
unsigned long long __attribute__((aligned(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, 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++;
		/* QS each 1024 reads */
		if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
			_rcu_quiescent_state();
		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
	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>
	35
	36	#include <urcu/arch.h>
	37
	38	/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
	39	#define CACHE_LINE_SIZE 4096
	40
	41	/* hardcoded number of CPUs */
	42	#define NR_CPUS 16384
	43
	44	#if defined(_syscall0)
	45	_syscall0(pid_t, gettid)
	46	#elif defined(__NR_gettid)
	47	static inline pid_t gettid(void)
	48	{
	49	return syscall(__NR_gettid);
	50	}
	51	#else
	52	#warning "use pid as tid"
	53	static inline pid_t gettid(void)
	54	{
	55	return getpid();
	56	}
	57	#endif
	58
	59	#define _LGPL_SOURCE
	60	#include <urcu-qsbr.h>
	61
	62	struct test_array {
	63	int a;
	64	};
	65
	66	static volatile int test_go, test_stop;
	67
	68	static unsigned long wdelay;
	69
	70	static struct test_array *test_rcu_pointer;
	71
	72	static unsigned long duration;
	73
	74	/* read-side C.S. duration, in loops */
	75	static unsigned long rduration;
	76	static unsigned int reclaim_batch = 1;
	77
	78	struct reclaim_queue {
	79	void *queue; / Beginning of queue */
	80	void *head; / Insert position */
	81	};
	82
	83	static struct reclaim_queue *pending_reclaims;
	84
	85
	86	static inline void loop_sleep(unsigned long l)
	87	{
	88	while(l-- != 0)
	89	cpu_relax();
	90	}
	91
	92	static int verbose_mode;
	93
	94	#define printf_verbose(fmt, args...) \
	95	do { \
	96	if (verbose_mode) \
	97	printf(fmt, args); \
	98	} while (0)
	99
	100	static unsigned int cpu_affinities[NR_CPUS];
	101	static unsigned int next_aff = 0;
	102	static int use_affinity = 0;
	103
	104	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
	105
	106	static void set_affinity(void)
	107	{
	108	cpu_set_t mask;
	109	int cpu;
	110	int ret;
	111
	112	if (!use_affinity)
	113	return;
	114
	115	ret = pthread_mutex_lock(&affinity_mutex);
	116	if (ret) {
	117	perror("Error in pthread mutex lock");
	118	exit(-1);
	119	}
	120	cpu = cpu_affinities[next_aff++];
	121	ret = pthread_mutex_unlock(&affinity_mutex);
	122	if (ret) {
	123	perror("Error in pthread mutex unlock");
	124	exit(-1);
	125	}
	126	CPU_ZERO(&mask);
	127	CPU_SET(cpu, &mask);
	128	sched_setaffinity(0, sizeof(mask), &mask);
	129	}
	130
	131	/*
	132	* returns 0 if test should end.
	133	*/
	134	static int test_duration_write(void)
	135	{
	136	return !test_stop;
	137	}
	138
	139	static int test_duration_read(void)
	140	{
	141	return !test_stop;
	142	}
	143
	144	static unsigned long long __thread nr_writes;
	145	static unsigned long long __thread nr_reads;
	146
	147	static unsigned int nr_readers;
	148	static unsigned int nr_writers;
	149
	150	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	151	static
	152	unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
	153
	154
	155	void rcu_copy_mutex_lock(void)
	156	{
	157	int ret;
	158	ret = pthread_mutex_lock(&rcu_copy_mutex);
	159	if (ret) {
	160	perror("Error in pthread mutex lock");
	161	exit(-1);
	162	}
	163	}
	164
	165	void rcu_copy_mutex_unlock(void)
	166	{
	167	int ret;
	168
	169	ret = pthread_mutex_unlock(&rcu_copy_mutex);
	170	if (ret) {
	171	perror("Error in pthread mutex unlock");
	172	exit(-1);
	173	}
	174	}
	175
	176	void thr_reader(void _count)
	177	{
	178	unsigned long long *count = _count;
	179	struct test_array *local_ptr;
	180
	181	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	182	"reader", pthread_self(), (unsigned long)gettid());
	183
	184	set_affinity();
	185
	186	rcu_register_thread();
	187
	188	while (!test_go)
	189	{
	190	}
	191	smp_mb();
	192
	193	for (;;) {
	194	_rcu_read_lock();
	195	local_ptr = _rcu_dereference(test_rcu_pointer);
	196	debug_yield_read();
	197	if (local_ptr)
	198	assert(local_ptr->a == 8);
	199	if (unlikely(rduration))
	200	loop_sleep(rduration);
	201	_rcu_read_unlock();
	202	nr_reads++;
	203	/* QS each 1024 reads */
	204	if (unlikely((nr_reads & ((1 << 10) - 1)) == 0))
	205	_rcu_quiescent_state();
	206	if (unlikely(!test_duration_read()))
	207	break;
	208	}
	209
	210	rcu_unregister_thread();
	211
	212	*count = nr_reads;
	213	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	214	"reader", pthread_self(), (unsigned long)gettid());
	215	return ((void*)1);
	216
	217	}
	218
	219	static void rcu_gc_clear_queue(unsigned long wtidx)
	220	{
	221	void **p;
	222
	223	/* Wait for Q.S and empty queue */
	224	synchronize_rcu();
	225
	226	for (p = pending_reclaims[wtidx].queue;
	227	p < pending_reclaims[wtidx].head; p++) {
	228	/* poison */
	229	if (*p)
	230	((struct test_array )p)->a = 0;
	231	free(*p);
	232	}
	233	pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue;
	234	}
	235
	236	/* Using per-thread queue */
	237	static void rcu_gc_reclaim(unsigned long wtidx, void *old)
	238	{
	239	/* Queue pointer */
	240	*pending_reclaims[wtidx].head = old;
	241	pending_reclaims[wtidx].head++;
	242
	243	if (likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue
	244	< reclaim_batch))
	245	return;
	246
	247	rcu_gc_clear_queue(wtidx);
	248	}
	249
	250	void thr_writer(void data)
	251	{
	252	unsigned long wtidx = (unsigned long)data;
	253	#ifdef TEST_LOCAL_GC
	254	struct test_array *old = NULL;
	255	#else
	256	struct test_array new, old;
	257	#endif
	258
	259	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
	260	"writer", pthread_self(), (unsigned long)gettid());
	261
	262	set_affinity();
	263
	264	while (!test_go)
	265	{
	266	}
	267	smp_mb();
	268
	269	for (;;) {
	270	#ifndef TEST_LOCAL_GC
	271	new = malloc(sizeof(*new));
	272	new->a = 8;
	273	old = _rcu_xchg_pointer(&test_rcu_pointer, new);
	274	#endif
	275	rcu_gc_reclaim(wtidx, old);
	276	nr_writes++;
	277	if (unlikely(!test_duration_write()))
	278	break;
	279	if (unlikely(wdelay))
	280	loop_sleep(wdelay);
	281	}
	282
	283	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
	284	"writer", pthread_self(), (unsigned long)gettid());
	285	tot_nr_writes[wtidx] = nr_writes;
	286	return ((void*)2);
	287	}
	288
	289	void show_usage(int argc, char **argv)
	290	{
	291	printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
	292	#ifdef DEBUG_YIELD
	293	printf(" [-r] [-w] (yield reader and/or writer)");
	294	#endif
	295	printf(" [-d delay] (writer period (us))");
	296	printf(" [-c duration] (reader C.S. duration (in loops))");
	297	printf(" [-v] (verbose output)");
	298	printf(" [-a cpu#] [-a cpu#]... (affinity)");
	299	printf("\n");
	300	}
	301
	302	int main(int argc, char **argv)
	303	{
	304	int err;
	305	pthread_t tid_reader, tid_writer;
	306	void *tret;
	307	unsigned long long *count_reader;
	308	unsigned long long tot_reads = 0, tot_writes = 0;
	309	int i, a;
	310
	311	if (argc < 4) {
	312	show_usage(argc, argv);
	313	return -1;
	314	}
	315
	316	err = sscanf(argv[1], "%u", &nr_readers);
	317	if (err != 1) {
	318	show_usage(argc, argv);
	319	return -1;
	320	}
	321
	322	err = sscanf(argv[2], "%u", &nr_writers);
	323	if (err != 1) {
	324	show_usage(argc, argv);
	325	return -1;
	326	}
	327
	328	err = sscanf(argv[3], "%lu", &duration);
	329	if (err != 1) {
	330	show_usage(argc, argv);
	331	return -1;
	332	}
	333
	334	for (i = 4; i < argc; i++) {
	335	if (argv[i][0] != '-')
	336	continue;
	337	switch (argv[i][1]) {
	338	#ifdef DEBUG_YIELD
	339	case 'r':
	340	yield_active \|= YIELD_READ;
	341	break;
	342	case 'w':
	343	yield_active \|= YIELD_WRITE;
	344	break;
	345	#endif
	346	case 'a':
	347	if (argc < i + 2) {
	348	show_usage(argc, argv);
	349	return -1;
	350	}
	351	a = atoi(argv[++i]);
	352	cpu_affinities[next_aff++] = a;
	353	use_affinity = 1;
	354	printf_verbose("Adding CPU %d affinity\n", a);
	355	break;
	356	case 'b':
	357	if (argc < i + 2) {
	358	show_usage(argc, argv);
	359	return -1;
	360	}
	361	reclaim_batch = atol(argv[++i]);
	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;
	377	case 'v':
	378	verbose_mode = 1;
	379	break;
	380	}
	381	}
	382
	383	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	384	duration, nr_readers, nr_writers);
	385	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	386	printf_verbose("Reader duration : %lu loops.\n", rduration);
	387	printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
	388	"main", pthread_self(), (unsigned long)gettid());
	389
	390	tid_reader = malloc(sizeof(tid_reader) nr_readers);
	391	tid_writer = malloc(sizeof(tid_writer) nr_writers);
	392	count_reader = malloc(sizeof(count_reader) nr_readers);
	393	tot_nr_writes = malloc(sizeof(tot_nr_writes) nr_writers);
	394	pending_reclaims = malloc(sizeof(pending_reclaims) nr_writers);
	395	if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
	396	< CACHE_LINE_SIZE)
	397	for (i = 0; i < nr_writers; i++)
	398	pending_reclaims[i].queue = calloc(1, CACHE_LINE_SIZE);
	399	else
	400	for (i = 0; i < nr_writers; i++)
	401	pending_reclaims[i].queue = calloc(reclaim_batch,
	402	sizeof(*pending_reclaims[i].queue));
	403	for (i = 0; i < nr_writers; i++)
	404	pending_reclaims[i].head = pending_reclaims[i].queue;
	405
	406	next_aff = 0;
	407
	408	for (i = 0; i < nr_readers; i++) {
	409	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	410	&count_reader[i]);
	411	if (err != 0)
	412	exit(1);
	413	}
	414	for (i = 0; i < nr_writers; i++) {
	415	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	416	(void *)(long)i);
	417	if (err != 0)
	418	exit(1);
	419	}
	420
	421	smp_mb();
	422
	423	test_go = 1;
	424
	425	sleep(duration);
	426
	427	test_stop = 1;
	428
	429	for (i = 0; i < nr_readers; i++) {
	430	err = pthread_join(tid_reader[i], &tret);
	431	if (err != 0)
	432	exit(1);
	433	tot_reads += count_reader[i];
	434	}
	435	for (i = 0; i < nr_writers; i++) {
	436	err = pthread_join(tid_writer[i], &tret);
	437	if (err != 0)
	438	exit(1);
	439	tot_writes += tot_nr_writes[i];
	440	rcu_gc_clear_queue(i);
	441	}
	442
	443	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	444	tot_writes);
	445	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
	446	"nr_writers %3u "
	447	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
	448	"batch %u\n",
	449	argv[0], duration, nr_readers, rduration,
	450	nr_writers, wdelay, tot_reads, tot_writes,
	451	tot_reads + tot_writes, reclaim_batch);
	452	free(tid_reader);
	453	free(tid_writer);
	454	free(count_reader);
	455	free(tot_nr_writes);
	456	for (i = 0; i < nr_writers; i++)
	457	free(pending_reclaims[i].queue);
	458	free(pending_reclaims);
	459
	460	return 0;
	461	}