[userspace-rcu.git] / tests / benchmark / test_urcu_gc.c

/*
 * test_urcu_gc.c
 *
 * Userspace RCU library - test program (with batch 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 <errno.h>

#include <urcu/arch.h>
#include <urcu/tls-compat.h>
#include "cpuset.h"
#include "thread-id.h"

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

#ifndef DYNAMIC_LINK_TEST
#define _LGPL_SOURCE
#else
#define rcu_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;

/* 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 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, 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)++;
		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");
#ifdef DEBUG_YIELD
	printf("	[-r] [-w] (yield reader and/or writer)\n");
#endif
	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]) {
#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 '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
a813abf8 MD	1	/*
	2	* test_urcu_gc.c
	3	*
ffa11a18	4	* Userspace RCU library - test program (with batch reclamation)
a813abf8	5	*
6982d6d7	6	* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
a813abf8 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
f5ab766e	24	#include "config.h"
a813abf8 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>
94b343fd	34	#include <errno.h>
a813abf8	35
ec4e58a3	36	#include <urcu/arch.h>
bd252a04	37	#include <urcu/tls-compat.h>
2953b501	38	#include "cpuset.h"
94df6318	39	#include "thread-id.h"
65fcc7e9	40
2a7ac59d MD	41	/* hardcoded number of CPUs */
	42	#define NR_CPUS 16384
	43
a813abf8 MD	44	#ifndef DYNAMIC_LINK_TEST
	45	#define _LGPL_SOURCE
	46	#else
1de4df4b	47	#define rcu_debug_yield_read()
a813abf8	48	#endif
ec4e58a3	49	#include <urcu.h>
a813abf8 MD	50
	51	struct test_array {
	52	int a;
	53	};
	54
	55	static volatile int test_go, test_stop;
	56
	57	static unsigned long wdelay;
	58
	59	static struct test_array *test_rcu_pointer;
	60
4a3e0004	61	static unsigned int reclaim_batch = 1;
a813abf8 MD	62
	63	struct reclaim_queue {
	64	void *queue; / Beginning of queue */
	65	void *head; / Insert position */
	66	};
	67
	68	static struct reclaim_queue *pending_reclaims;
	69
	70	static unsigned long duration;
	71
	72	/* read-side C.S. duration, in loops */
	73	static unsigned long rduration;
	74
31b598e0 MD	75	/* write-side C.S. duration, in loops */
	76	static unsigned long wduration;
	77
ab0aacbe	78	static inline void loop_sleep(unsigned long loops)
a813abf8	79	{
ab0aacbe	80	while (loops-- != 0)
06f22bdb	81	caa_cpu_relax();
a813abf8 MD	82	}
	83
	84	static int verbose_mode;
	85
	86	#define printf_verbose(fmt, args...) \
	87	do { \
	88	if (verbose_mode) \
	89	printf(fmt, args); \
	90	} while (0)
	91
2a7ac59d MD	92	static unsigned int cpu_affinities[NR_CPUS];
	93	static unsigned int next_aff = 0;
	94	static int use_affinity = 0;
	95
6af882ba MD	96	pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
6af882ba MD	97
2a7ac59d MD	98	static void set_affinity(void)
2a7ac59d MD	99	{
95bc7fb9	100	#if HAVE_SCHED_SETAFFINITY
2a7ac59d	101	cpu_set_t mask;
95bc7fb9 MD	102	int cpu, ret;
95bc7fb9 MD	103	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	104
	105	if (!use_affinity)
	106	return;
	107
d8540fc5	108	#if HAVE_SCHED_SETAFFINITY
6af882ba MD	109	ret = pthread_mutex_lock(&affinity_mutex);
	110	if (ret) {
	111	perror("Error in pthread mutex lock");
	112	exit(-1);
	113	}
2a7ac59d	114	cpu = cpu_affinities[next_aff++];
6af882ba MD	115	ret = pthread_mutex_unlock(&affinity_mutex);
	116	if (ret) {
	117	perror("Error in pthread mutex unlock");
	118	exit(-1);
	119	}
d8540fc5	120
2a7ac59d MD	121	CPU_ZERO(&mask);
2a7ac59d MD	122	CPU_SET(cpu, &mask);
d8540fc5 PA	123	#if SCHED_SETAFFINITY_ARGS == 2
	124	sched_setaffinity(0, &mask);
	125	#else
2a7ac59d	126	sched_setaffinity(0, sizeof(mask), &mask);
d8540fc5 PA	127	#endif
d8540fc5 PA	128	#endif /* HAVE_SCHED_SETAFFINITY */
2a7ac59d MD	129	}
2a7ac59d MD	130
a813abf8 MD	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
bd252a04 MD	144	static DEFINE_URCU_TLS(unsigned long long, nr_writes);
bd252a04 MD	145	static DEFINE_URCU_TLS(unsigned long long, nr_reads);
a813abf8 MD	146
a813abf8 MD	147	static
06f22bdb	148	unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
a813abf8 MD	149
	150	static unsigned int nr_readers;
	151	static unsigned int nr_writers;
	152
	153	pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
	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
94df6318 MD	181	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	182	"reader", urcu_get_thread_id());
a813abf8	183
2a7ac59d MD	184	set_affinity();
2a7ac59d MD	185
a813abf8 MD	186	rcu_register_thread();
	187
	188	while (!test_go)
	189	{
	190	}
5481ddb3	191	cmm_smp_mb();
a813abf8 MD	192
	193	for (;;) {
	194	rcu_read_lock();
	195	local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b	196	rcu_debug_yield_read();
a813abf8 MD	197	if (local_ptr)
a813abf8 MD	198	assert(local_ptr->a == 8);
a0b7f7ea	199	if (caa_unlikely(rduration))
a813abf8 MD	200	loop_sleep(rduration);
a813abf8 MD	201	rcu_read_unlock();
bd252a04	202	URCU_TLS(nr_reads)++;
a0b7f7ea	203	if (caa_unlikely(!test_duration_read()))
a813abf8 MD	204	break;
	205	}
	206
	207	rcu_unregister_thread();
	208
bd252a04	209	*count = URCU_TLS(nr_reads);
94df6318 MD	210	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	211	"reader", urcu_get_thread_id());
a813abf8 MD	212	return ((void*)1);
	213
	214	}
	215
53091fe5	216	static void rcu_gc_clear_queue(unsigned long wtidx)
a813abf8 MD	217	{
	218	void **p;
	219
53091fe5	220	/* Wait for Q.S and empty queue */
a813abf8 MD	221	synchronize_rcu();
	222
	223	for (p = pending_reclaims[wtidx].queue;
	224	p < pending_reclaims[wtidx].head; p++) {
	225	/* poison */
	226	if (*p)
	227	((struct test_array )p)->a = 0;
	228	free(*p);
	229	}
	230	pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue;
	231	}
	232
53091fe5 MD	233	/* Using per-thread queue */
53091fe5 MD	234	static void rcu_gc_reclaim(unsigned long wtidx, void *old)
a813abf8	235	{
53091fe5 MD	236	/* Queue pointer */
	237	*pending_reclaims[wtidx].head = old;
	238	pending_reclaims[wtidx].head++;
a813abf8	239
a0b7f7ea	240	if (caa_likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue
53091fe5 MD	241	< reclaim_batch))
53091fe5 MD	242	return;
a813abf8	243
53091fe5	244	rcu_gc_clear_queue(wtidx);
a813abf8 MD	245	}
	246
	247	void thr_writer(void data)
	248	{
	249	unsigned long wtidx = (unsigned long)data;
321e29d9 MD	250	#ifdef TEST_LOCAL_GC
	251	struct test_array *old = NULL;
	252	#else
a813abf8	253	struct test_array new, old;
321e29d9	254	#endif
a813abf8	255
94df6318 MD	256	printf_verbose("thread_begin %s, tid %lu\n",
94df6318 MD	257	"writer", urcu_get_thread_id());
a813abf8	258
2a7ac59d MD	259	set_affinity();
2a7ac59d MD	260
a813abf8 MD	261	while (!test_go)
	262	{
	263	}
5481ddb3	264	cmm_smp_mb();
a813abf8 MD	265
a813abf8 MD	266	for (;;) {
321e29d9	267	#ifndef TEST_LOCAL_GC
a813abf8	268	new = malloc(sizeof(*new));
a813abf8 MD	269	new->a = 8;
a813abf8 MD	270	old = rcu_xchg_pointer(&test_rcu_pointer, new);
321e29d9	271	#endif
a0b7f7ea	272	if (caa_unlikely(wduration))
31b598e0	273	loop_sleep(wduration);
a813abf8	274	rcu_gc_reclaim(wtidx, old);
bd252a04	275	URCU_TLS(nr_writes)++;
a0b7f7ea	276	if (caa_unlikely(!test_duration_write()))
a813abf8	277	break;
a0b7f7ea	278	if (caa_unlikely(wdelay))
a813abf8 MD	279	loop_sleep(wdelay);
	280	}
	281
94df6318 MD	282	printf_verbose("thread_end %s, tid %lu\n",
94df6318 MD	283	"writer", urcu_get_thread_id());
bd252a04	284	tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
a813abf8 MD	285	return ((void*)2);
	286	}
	287
	288	void show_usage(int argc, char **argv)
	289	{
06637138 MD	290	printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
	291	argv[0]);
	292	printf("OPTIONS:\n");
a813abf8	293	#ifdef DEBUG_YIELD
06637138	294	printf(" [-r] [-w] (yield reader and/or writer)\n");
a813abf8	295	#endif
06637138 MD	296	printf(" [-d delay] (writer period (us))\n");
	297	printf(" [-c duration] (reader C.S. duration (in loops))\n");
	298	printf(" [-e duration] (writer C.S. duration (in loops))\n");
	299	printf(" [-v] (verbose output)\n");
	300	printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
a813abf8 MD	301	printf("\n");
	302	}
	303
a813abf8 MD	304	int main(int argc, char **argv)
	305	{
	306	int err;
	307	pthread_t tid_reader, tid_writer;
	308	void *tret;
	309	unsigned long long *count_reader;
	310	unsigned long long tot_reads = 0, tot_writes = 0;
	311	int i, a;
a813abf8 MD	312
	313	if (argc < 4) {
	314	show_usage(argc, argv);
	315	return -1;
	316	}
	317
	318	err = sscanf(argv[1], "%u", &nr_readers);
	319	if (err != 1) {
	320	show_usage(argc, argv);
	321	return -1;
	322	}
	323
	324	err = sscanf(argv[2], "%u", &nr_writers);
	325	if (err != 1) {
	326	show_usage(argc, argv);
	327	return -1;
	328	}
	329
	330	err = sscanf(argv[3], "%lu", &duration);
	331	if (err != 1) {
	332	show_usage(argc, argv);
	333	return -1;
	334	}
	335
a813abf8 MD	336	for (i = 4; i < argc; i++) {
	337	if (argv[i][0] != '-')
	338	continue;
	339	switch (argv[i][1]) {
	340	#ifdef DEBUG_YIELD
	341	case 'r':
1de4df4b	342	rcu_yield_active \|= RCU_YIELD_READ;
a813abf8 MD	343	break;
a813abf8 MD	344	case 'w':
1de4df4b	345	rcu_yield_active \|= RCU_YIELD_WRITE;
a813abf8 MD	346	break;
	347	#endif
	348	case 'a':
	349	if (argc < i + 2) {
	350	show_usage(argc, argv);
	351	return -1;
	352	}
	353	a = atoi(argv[++i]);
2a7ac59d	354	cpu_affinities[next_aff++] = a;
a813abf8 MD	355	use_affinity = 1;
	356	printf_verbose("Adding CPU %d affinity\n", a);
	357	break;
	358	case 'b':
	359	if (argc < i + 2) {
	360	show_usage(argc, argv);
	361	return -1;
	362	}
	363	reclaim_batch = atol(argv[++i]);
	364	break;
	365	case 'c':
	366	if (argc < i + 2) {
	367	show_usage(argc, argv);
	368	return -1;
	369	}
	370	rduration = atol(argv[++i]);
	371	break;
	372	case 'd':
	373	if (argc < i + 2) {
	374	show_usage(argc, argv);
	375	return -1;
	376	}
	377	wdelay = atol(argv[++i]);
	378	break;
31b598e0 MD	379	case 'e':
	380	if (argc < i + 2) {
	381	show_usage(argc, argv);
	382	return -1;
	383	}
	384	wduration = atol(argv[++i]);
	385	break;
a813abf8 MD	386	case 'v':
	387	verbose_mode = 1;
	388	break;
	389	}
	390	}
	391
	392	printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
	393	duration, nr_readers, nr_writers);
	394	printf_verbose("Writer delay : %lu loops.\n", wdelay);
	395	printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318 MD	396	printf_verbose("thread %-6s, tid %lu\n",
94df6318 MD	397	"main", urcu_get_thread_id());
a813abf8	398
9aa14175 MD	399	tid_reader = calloc(nr_readers, sizeof(*tid_reader));
	400	tid_writer = calloc(nr_writers, sizeof(*tid_writer));
	401	count_reader = calloc(nr_readers, sizeof(*count_reader));
	402	tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
	403	pending_reclaims = calloc(nr_writers, sizeof(*pending_reclaims));
a813abf8	404	if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
06f22bdb	405	< CAA_CACHE_LINE_SIZE)
a813abf8	406	for (i = 0; i < nr_writers; i++)
06f22bdb	407	pending_reclaims[i].queue = calloc(1, CAA_CACHE_LINE_SIZE);
a813abf8 MD	408	else
	409	for (i = 0; i < nr_writers; i++)
	410	pending_reclaims[i].queue = calloc(reclaim_batch,
	411	sizeof(*pending_reclaims[i].queue));
	412	for (i = 0; i < nr_writers; i++)
	413	pending_reclaims[i].head = pending_reclaims[i].queue;
	414
2a7ac59d MD	415	next_aff = 0;
2a7ac59d MD	416
a813abf8 MD	417	for (i = 0; i < nr_readers; i++) {
	418	err = pthread_create(&tid_reader[i], NULL, thr_reader,
	419	&count_reader[i]);
	420	if (err != 0)
	421	exit(1);
	422	}
	423	for (i = 0; i < nr_writers; i++) {
	424	err = pthread_create(&tid_writer[i], NULL, thr_writer,
	425	(void *)(long)i);
	426	if (err != 0)
	427	exit(1);
	428	}
	429
5481ddb3	430	cmm_smp_mb();
a813abf8 MD	431
	432	test_go = 1;
	433
	434	sleep(duration);
	435
	436	test_stop = 1;
	437
	438	for (i = 0; i < nr_readers; i++) {
	439	err = pthread_join(tid_reader[i], &tret);
	440	if (err != 0)
	441	exit(1);
	442	tot_reads += count_reader[i];
	443	}
	444	for (i = 0; i < nr_writers; i++) {
	445	err = pthread_join(tid_writer[i], &tret);
	446	if (err != 0)
	447	exit(1);
	448	tot_writes += tot_nr_writes[i];
53091fe5	449	rcu_gc_clear_queue(i);
a813abf8 MD	450	}
	451
	452	printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
	453	tot_writes);
a50a7b43	454	printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
a813abf8	455	"nr_writers %3u "
4a3e0004 MD	456	"wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
4a3e0004 MD	457	"batch %u\n",
a50a7b43	458	argv[0], duration, nr_readers, rduration, wduration,
a813abf8	459	nr_writers, wdelay, tot_reads, tot_writes,
4a3e0004	460	tot_reads + tot_writes, reclaim_batch);
a813abf8 MD	461	free(tid_reader);
	462	free(tid_writer);
	463	free(count_reader);
	464	free(tot_nr_writes);
	465	for (i = 0; i < nr_writers; i++)
	466	free(pending_reclaims[i].queue);
	467	free(pending_reclaims);
	468
	469	return 0;
	470	}