rcuja: add basic test

[urcu.git] / tests / test_urcu_ja.c

/*
 * test_urcu_ja.c
 *
 * Userspace RCU library - test program
 *
 * Copyright 2009-2012 - 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 "test_urcu_ja.h"

DEFINE_URCU_TLS(unsigned int, rand_lookup);
DEFINE_URCU_TLS(unsigned long, nr_add);
DEFINE_URCU_TLS(unsigned long, nr_addexist);
DEFINE_URCU_TLS(unsigned long, nr_del);
DEFINE_URCU_TLS(unsigned long, nr_delnoent);
DEFINE_URCU_TLS(unsigned long, lookup_fail);
DEFINE_URCU_TLS(unsigned long, lookup_ok);

struct cds_ja *test_ja;

volatile int test_go, test_stop;

unsigned long wdelay;

unsigned long duration;

/* read-side C.S. duration, in loops */
unsigned long rduration;

unsigned long init_populate;
int add_only;

unsigned long init_pool_offset, lookup_pool_offset, write_pool_offset;
unsigned long init_pool_size = DEFAULT_RAND_POOL,
	lookup_pool_size = DEFAULT_RAND_POOL,
	write_pool_size = DEFAULT_RAND_POOL;
int validate_lookup;

int count_pipe[2];

int verbose_mode;

unsigned int cpu_affinities[NR_CPUS];
unsigned int next_aff = 0;
int use_affinity = 0;

pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;

DEFINE_URCU_TLS(unsigned long long, nr_writes);
DEFINE_URCU_TLS(unsigned long long, nr_reads);

unsigned int nr_readers;
unsigned int nr_writers;

static pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;

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 */
}

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);
	}
}

#if 0
void free_node_cb(struct rcu_head *head)
{
	struct ja_test_node *node =
		caa_container_of(head, struct ja_test_node, head);
	free(node);
}

static
void test_delete_all_nodes(struct cds_lfht *ht)
{
	struct cds_lfht_iter iter;
	struct lfht_test_node *node;
	unsigned long count = 0;

	cds_lfht_for_each_entry(ht, &iter, node, node) {
		int ret;

		ret = cds_lfht_del(test_ht, cds_lfht_iter_get_node(&iter));
		assert(!ret);
		call_rcu(&node->head, free_node_cb);
		count++;
	}
	printf("deleted %lu nodes.\n", count);
}
#endif

void show_usage(int argc, char **argv)
{
	printf("Usage : %s nr_readers nr_writers duration (s)\n", argv[0]);
#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("        [-v] (verbose output)\n");
	printf("        [-a cpu#] [-a cpu#]... (affinity)\n");
printf("        [not -u nor -s] Add entries (supports redundant keys).\n");
	printf("        [-i] Add only (no removal).\n");
	printf("        [-k nr_nodes] Number of nodes to insert initially.\n");
	printf("        [-R offset] Lookup pool offset.\n");
	printf("        [-S offset] Write pool offset.\n");
	printf("        [-T offset] Init pool offset.\n");
	printf("        [-M size] Lookup pool size.\n");
	printf("        [-N size] Write pool size.\n");
	printf("        [-O size] Init pool size.\n");
	printf("        [-V] Validate lookups of init values (use with filled init pool, same lookup range, with different write range).\n");
	printf("\n\n");
}

int main(int argc, char **argv)
{
	int err;
	pthread_t *tid_reader, *tid_writer;
	void *tret;
	unsigned long long *count_reader;
	struct wr_count *count_writer;
	unsigned long long tot_reads = 0, tot_writes = 0,
		tot_add = 0, tot_add_exist = 0, tot_remove = 0;
	int i, a, ret;
	unsigned int remain;

	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 'v':
			verbose_mode = 1;
			break;
		case 'i':
			add_only = 1;
			break;
		case 'k':
			init_populate = atol(argv[++i]);
			break;
		case 'R':
			lookup_pool_offset = atol(argv[++i]);
			break;
		case 'S':
			write_pool_offset = atol(argv[++i]);
			break;
		case 'T':
			init_pool_offset = atol(argv[++i]);
			break;
		case 'M':
			lookup_pool_size = atol(argv[++i]);
			break;
		case 'N':
			write_pool_size = atol(argv[++i]);
			break;
		case 'O':
			init_pool_size = atol(argv[++i]);
			break;
		case 'V':
			validate_lookup = 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("Mode:%s.\n",
		add_only ? " add only" : " add/delete");
	printf_verbose("Init pool size offset %lu size %lu.\n",
		init_pool_offset, init_pool_size);
	printf_verbose("Lookup pool size offset %lu size %lu.\n",
		lookup_pool_offset, lookup_pool_size);
	printf_verbose("Update pool size offset %lu size %lu.\n",
		write_pool_offset, write_pool_size);
	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);
	count_writer = malloc(sizeof(*count_writer) * nr_writers);

	err = create_all_cpu_call_rcu_data(0);
	if (err) {
		printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
	}

	/* Test with 8-bit key */
	test_ja = cds_ja_new(8);
	if (!test_ja) {
		printf("Error allocating judy array.\n");
		return -1;
	}

	/* Add keys */
	for (i = 0; i < 200; i++) {
		struct ja_test_node *node =
			calloc(sizeof(*node), 1);

		ja_test_node_init(node, i);
		ret = cds_ja_add(test_ja, i, &node->node);
		if (ret) {
			printf("Error adding node (%d)\n", ret);
			return -1;
		}
	}

	ret = cds_ja_destroy(test_ja);
	if (ret) {
		printf("Error destroying judy array\n");
		return -1;
	}
	printf("Test end.\n");
	return 0;

#if 0
	/*
	 * Hash Population needs to be seen as a RCU reader
	 * thread from the point of view of resize.
	 */
	rcu_register_thread();
      	ret = (get_populate_hash_cb())();
	assert(!ret);

	rcu_thread_offline();

	next_aff = 0;

	for (i = 0; i < nr_readers; i++) {
		err = pthread_create(&tid_reader[i],
				     NULL, get_thr_reader_cb(),
				     &count_reader[i]);
		if (err != 0)
			exit(1);
	}
	for (i = 0; i < nr_writers; i++) {
		err = pthread_create(&tid_writer[i],
				     NULL, get_thr_writer_cb(),
				     &count_writer[i]);
		if (err != 0)
			exit(1);
	}

	cmm_smp_mb();

	test_go = 1;

	remain = duration;
	do {
		remain = sleep(remain);
	} while (remain > 0);

	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 += count_writer[i].update_ops;
		tot_add += count_writer[i].add;
		tot_add_exist += count_writer[i].add_exist;
		tot_remove += count_writer[i].remove;
	}

	/* teardown counter thread */
	act.sa_handler = SIG_IGN;
	act.sa_flags = SA_RESTART;
	ret = sigaction(SIGUSR2, &act, NULL);
	if (ret == -1) {
		perror("sigaction");
		return -1;
	}
	{
		char msg[1] = { 0x42 };
		ssize_t ret;

		do {
			ret = write(count_pipe[1], msg, 1);	/* wakeup thread */
		} while (ret == -1L && errno == EINTR);
	}

	fflush(stdout);
	rcu_thread_online();
	rcu_read_lock();
	printf("Counting nodes... ");
	cds_lfht_count_nodes(test_ht, &approx_before, &count, &approx_after);
	printf("done.\n");
	test_delete_all_nodes(test_ht);
	rcu_read_unlock();
	rcu_thread_offline();
	if (count) {
		printf("Approximation before node accounting: %ld nodes.\n",
			approx_before);
		printf("Nodes deleted from hash table before destroy: "
			"%lu nodes.\n",
			count);
		printf("Approximation after node accounting: %ld nodes.\n",
			approx_after);
	}
	ret = cds_lfht_destroy(test_ht, NULL);
	if (ret)
		printf_verbose("final delete aborted\n");
	else
		printf_verbose("final delete success\n");
	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 "
		"nr_add %12llu nr_add_fail %12llu nr_remove %12llu nr_leaked %12lld\n",
		argv[0], duration, nr_readers, rduration,
		nr_writers, wdelay, tot_reads, tot_writes,
		tot_reads + tot_writes, tot_add, tot_add_exist, tot_remove,
		(long long) tot_add + init_populate - tot_remove - count);
	rcu_unregister_thread();
	free_all_cpu_call_rcu_data();
	free(tid_reader);
	free(tid_writer);
	free(count_reader);
	free(count_writer);
#endif
	return 0;
}