[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>

#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 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 l)
{
	while(l-- != 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)
{
	cpu_set_t mask;
	int cpu;
	int ret;

	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 unsigned long long __thread nr_writes;
static unsigned long long __thread 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", 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);
		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 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", 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 (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);
		nr_writes++;
		if (unlikely(!test_duration_write()))
			break;
		if (unlikely(wdelay))
			loop_sleep(wdelay);
	}

	rcu_defer_unregister_thread();

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