[linux-2.6-block.git] / tools / perf / bench / sched-messaging.c

// SPDX-License-Identifier: GPL-2.0
/*
 *
 * sched-messaging.c
 *
 * messaging: Benchmark for scheduler and IPC mechanisms
 *
 * Based on hackbench by Rusty Russell <rusty@rustcorp.com.au>
 * Ported to perf by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
 *
 */

#include "../perf.h"
#include "../util/util.h"
#include <subcmd/parse-options.h>
#include "../builtin.h"
#include "bench.h"

/* Test groups of 20 processes spraying to 20 receivers */
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <poll.h>
#include <limits.h>
#include <err.h>
#include <linux/time64.h>

#define DATASIZE 100

static bool use_pipes = false;
static unsigned int nr_loops = 100;
static bool thread_mode = false;
static unsigned int num_groups = 10;

struct sender_context {
	unsigned int num_fds;
	int ready_out;
	int wakefd;
	int out_fds[0];
};

struct receiver_context {
	unsigned int num_packets;
	int in_fds[2];
	int ready_out;
	int wakefd;
};

static void fdpair(int fds[2])
{
	if (use_pipes) {
		if (pipe(fds) == 0)
			return;
	} else {
		if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
			return;
	}

	err(EXIT_FAILURE, use_pipes ? "pipe()" : "socketpair()");
}

/* Block until we're ready to go */
static void ready(int ready_out, int wakefd)
{
	char dummy;
	struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };

	/* Tell them we're ready. */
	if (write(ready_out, &dummy, 1) != 1)
		err(EXIT_FAILURE, "CLIENT: ready write");

	/* Wait for "GO" signal */
	if (poll(&pollfd, 1, -1) != 1)
		err(EXIT_FAILURE, "poll");
}

/* Sender sprays nr_loops messages down each file descriptor */
static void *sender(struct sender_context *ctx)
{
	char data[DATASIZE];
	unsigned int i, j;

	ready(ctx->ready_out, ctx->wakefd);

	/* Now pump to every receiver. */
	for (i = 0; i < nr_loops; i++) {
		for (j = 0; j < ctx->num_fds; j++) {
			int ret, done = 0;

again:
			ret = write(ctx->out_fds[j], data + done,
				    sizeof(data)-done);
			if (ret < 0)
				err(EXIT_FAILURE, "SENDER: write");
			done += ret;
			if (done < DATASIZE)
				goto again;
		}
	}

	return NULL;
}


/* One receiver per fd */
static void *receiver(struct receiver_context* ctx)
{
	unsigned int i;

	if (!thread_mode)
		close(ctx->in_fds[1]);

	/* Wait for start... */
	ready(ctx->ready_out, ctx->wakefd);

	/* Receive them all */
	for (i = 0; i < ctx->num_packets; i++) {
		char data[DATASIZE];
		int ret, done = 0;

again:
		ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
		if (ret < 0)
			err(EXIT_FAILURE, "SERVER: read");
		done += ret;
		if (done < DATASIZE)
			goto again;
	}

	return NULL;
}

static pthread_t create_worker(void *ctx, void *(*func)(void *))
{
	pthread_attr_t attr;
	pthread_t childid;
	int ret;

	if (!thread_mode) {
		/* process mode */
		/* Fork the receiver. */
		switch (fork()) {
		case -1:
			err(EXIT_FAILURE, "fork()");
			break;
		case 0:
			(*func) (ctx);
			exit(0);
			break;
		default:
			break;
		}

		return (pthread_t)0;
	}

	if (pthread_attr_init(&attr) != 0)
		err(EXIT_FAILURE, "pthread_attr_init:");

#ifndef __ia64__
	if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
		err(EXIT_FAILURE, "pthread_attr_setstacksize");
#endif

	ret = pthread_create(&childid, &attr, func, ctx);
	if (ret != 0)
		err(EXIT_FAILURE, "pthread_create failed");

	return childid;
}

static void reap_worker(pthread_t id)
{
	int proc_status;
	void *thread_status;

	if (!thread_mode) {
		/* process mode */
		wait(&proc_status);
		if (!WIFEXITED(proc_status))
			exit(1);
	} else {
		pthread_join(id, &thread_status);
	}
}

/* One group of senders and receivers */
static unsigned int group(pthread_t *pth,
		unsigned int num_fds,
		int ready_out,
		int wakefd)
{
	unsigned int i;
	struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
			+ num_fds * sizeof(int));

	if (!snd_ctx)
		err(EXIT_FAILURE, "malloc()");

	for (i = 0; i < num_fds; i++) {
		int fds[2];
		struct receiver_context *ctx = malloc(sizeof(*ctx));

		if (!ctx)
			err(EXIT_FAILURE, "malloc()");


		/* Create the pipe between client and server */
		fdpair(fds);

		ctx->num_packets = num_fds * nr_loops;
		ctx->in_fds[0] = fds[0];
		ctx->in_fds[1] = fds[1];
		ctx->ready_out = ready_out;
		ctx->wakefd = wakefd;

		pth[i] = create_worker(ctx, (void *)receiver);

		snd_ctx->out_fds[i] = fds[1];
		if (!thread_mode)
			close(fds[0]);
	}

	/* Now we have all the fds, fork the senders */
	for (i = 0; i < num_fds; i++) {
		snd_ctx->ready_out = ready_out;
		snd_ctx->wakefd = wakefd;
		snd_ctx->num_fds = num_fds;

		pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
	}

	/* Close the fds we have left */
	if (!thread_mode)
		for (i = 0; i < num_fds; i++)
			close(snd_ctx->out_fds[i]);

	/* Return number of children to reap */
	return num_fds * 2;
}

static const struct option options[] = {
	OPT_BOOLEAN('p', "pipe", &use_pipes,
		    "Use pipe() instead of socketpair()"),
	OPT_BOOLEAN('t', "thread", &thread_mode,
		    "Be multi thread instead of multi process"),
	OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
	OPT_UINTEGER('l', "nr_loops", &nr_loops, "Specify the number of loops to run (default: 100)"),
	OPT_END()
};

static const char * const bench_sched_message_usage[] = {
	"perf bench sched messaging <options>",
	NULL
};

int bench_sched_messaging(int argc, const char **argv)
{
	unsigned int i, total_children;
	struct timeval start, stop, diff;
	unsigned int num_fds = 20;
	int readyfds[2], wakefds[2];
	char dummy;
	pthread_t *pth_tab;

	argc = parse_options(argc, argv, options,
			     bench_sched_message_usage, 0);

	pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
	if (!pth_tab)
		err(EXIT_FAILURE, "main:malloc()");

	fdpair(readyfds);
	fdpair(wakefds);

	total_children = 0;
	for (i = 0; i < num_groups; i++)
		total_children += group(pth_tab+total_children, num_fds,
					readyfds[1], wakefds[0]);

	/* Wait for everyone to be ready */
	for (i = 0; i < total_children; i++)
		if (read(readyfds[0], &dummy, 1) != 1)
			err(EXIT_FAILURE, "Reading for readyfds");

	gettimeofday(&start, NULL);

	/* Kick them off */
	if (write(wakefds[1], &dummy, 1) != 1)
		err(EXIT_FAILURE, "Writing to start them");

	/* Reap them all */
	for (i = 0; i < total_children; i++)
		reap_worker(pth_tab[i]);

	gettimeofday(&stop, NULL);

	timersub(&stop, &start, &diff);

	switch (bench_format) {
	case BENCH_FORMAT_DEFAULT:
		printf("# %d sender and receiver %s per group\n",
		       num_fds, thread_mode ? "threads" : "processes");
		printf("# %d groups == %d %s run\n\n",
		       num_groups, num_groups * 2 * num_fds,
		       thread_mode ? "threads" : "processes");
		printf(" %14s: %lu.%03lu [sec]\n", "Total time",
		       diff.tv_sec,
		       (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
		break;
	case BENCH_FORMAT_SIMPLE:
		printf("%lu.%03lu\n", diff.tv_sec,
		       (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
		break;
	default:
		/* reaching here is something disaster */
		fprintf(stderr, "Unknown format:%d\n", bench_format);
		exit(1);
		break;
	}

	free(pth_tab);

	return 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
e27454cc HM	2	/*
e27454cc HM	3	*
2044279d	4	* sched-messaging.c
e27454cc HM	5	*
	6	* messaging: Benchmark for scheduler and IPC mechanisms
	7	*
	8	* Based on hackbench by Rusty Russell <rusty@rustcorp.com.au>
	9	* Ported to perf by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
	10	*
	11	*/
	12
	13	#include "../perf.h"
	14	#include "../util/util.h"
4b6ab94e	15	#include <subcmd/parse-options.h>
e27454cc HM	16	#include "../builtin.h"
	17	#include "bench.h"
	18
	19	/* Test groups of 20 processes spraying to 20 receivers */
	20	#include <pthread.h>
	21	#include <stdio.h>
	22	#include <stdlib.h>
	23	#include <string.h>
	24	#include <errno.h>
	25	#include <unistd.h>
	26	#include <sys/types.h>
	27	#include <sys/socket.h>
	28	#include <sys/wait.h>
	29	#include <sys/time.h>
a8fa4960	30	#include <poll.h>
e27454cc	31	#include <limits.h>
ecdac968	32	#include <err.h>
af15e67e	33	#include <linux/time64.h>
e27454cc HM	34
	35	#define DATASIZE 100
	36
c0555642	37	static bool use_pipes = false;
b0d22e52	38	static unsigned int nr_loops = 100;
c0555642	39	static bool thread_mode = false;
e27454cc	40	static unsigned int num_groups = 10;
e27454cc HM	41
	42	struct sender_context {
	43	unsigned int num_fds;
	44	int ready_out;
	45	int wakefd;
	46	int out_fds[0];
	47	};
	48
	49	struct receiver_context {
	50	unsigned int num_packets;
	51	int in_fds[2];
	52	int ready_out;
	53	int wakefd;
	54	};
	55
e27454cc HM	56	static void fdpair(int fds[2])
	57	{
	58	if (use_pipes) {
	59	if (pipe(fds) == 0)
	60	return;
	61	} else {
	62	if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
	63	return;
	64	}
	65
ecdac968	66	err(EXIT_FAILURE, use_pipes ? "pipe()" : "socketpair()");
e27454cc HM	67	}
	68
	69	/* Block until we're ready to go */
	70	static void ready(int ready_out, int wakefd)
	71	{
	72	char dummy;
	73	struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
	74
	75	/* Tell them we're ready. */
	76	if (write(ready_out, &dummy, 1) != 1)
ecdac968	77	err(EXIT_FAILURE, "CLIENT: ready write");
e27454cc HM	78
	79	/* Wait for "GO" signal */
	80	if (poll(&pollfd, 1, -1) != 1)
ecdac968	81	err(EXIT_FAILURE, "poll");
e27454cc HM	82	}
e27454cc HM	83
b0d22e52	84	/* Sender sprays nr_loops messages down each file descriptor */
e27454cc HM	85	static void sender(struct sender_context ctx)
	86	{
	87	char data[DATASIZE];
	88	unsigned int i, j;
	89
	90	ready(ctx->ready_out, ctx->wakefd);
	91
	92	/* Now pump to every receiver. */
b0d22e52	93	for (i = 0; i < nr_loops; i++) {
e27454cc HM	94	for (j = 0; j < ctx->num_fds; j++) {
	95	int ret, done = 0;
	96
	97	again:
	98	ret = write(ctx->out_fds[j], data + done,
	99	sizeof(data)-done);
	100	if (ret < 0)
ecdac968	101	err(EXIT_FAILURE, "SENDER: write");
e27454cc HM	102	done += ret;
	103	if (done < DATASIZE)
	104	goto again;
	105	}
	106	}
	107
	108	return NULL;
	109	}
	110
	111
	112	/* One receiver per fd */
	113	static void receiver(struct receiver_context ctx)
	114	{
	115	unsigned int i;
	116
	117	if (!thread_mode)
	118	close(ctx->in_fds[1]);
	119
	120	/* Wait for start... */
	121	ready(ctx->ready_out, ctx->wakefd);
	122
	123	/* Receive them all */
	124	for (i = 0; i < ctx->num_packets; i++) {
	125	char data[DATASIZE];
	126	int ret, done = 0;
	127
	128	again:
	129	ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
	130	if (ret < 0)
ecdac968	131	err(EXIT_FAILURE, "SERVER: read");
e27454cc HM	132	done += ret;
	133	if (done < DATASIZE)
	134	goto again;
	135	}
	136
	137	return NULL;
	138	}
	139
	140	static pthread_t create_worker(void ctx, void (func)(void ))
	141	{
	142	pthread_attr_t attr;
	143	pthread_t childid;
ecdac968	144	int ret;
e27454cc HM	145
	146	if (!thread_mode) {
	147	/* process mode */
	148	/* Fork the receiver. */
	149	switch (fork()) {
	150	case -1:
ecdac968	151	err(EXIT_FAILURE, "fork()");
e27454cc HM	152	break;
	153	case 0:
	154	(*func) (ctx);
	155	exit(0);
	156	break;
	157	default:
	158	break;
	159	}
	160
	161	return (pthread_t)0;
	162	}
	163
	164	if (pthread_attr_init(&attr) != 0)
ecdac968	165	err(EXIT_FAILURE, "pthread_attr_init:");
e27454cc HM	166
	167	#ifndef __ia64__
	168	if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
ecdac968	169	err(EXIT_FAILURE, "pthread_attr_setstacksize");
e27454cc HM	170	#endif
e27454cc HM	171
ecdac968 DB	172	ret = pthread_create(&childid, &attr, func, ctx);
	173	if (ret != 0)
	174	err(EXIT_FAILURE, "pthread_create failed");
	175
e27454cc HM	176	return childid;
	177	}
	178
	179	static void reap_worker(pthread_t id)
	180	{
	181	int proc_status;
	182	void *thread_status;
	183
	184	if (!thread_mode) {
	185	/* process mode */
	186	wait(&proc_status);
	187	if (!WIFEXITED(proc_status))
	188	exit(1);
	189	} else {
	190	pthread_join(id, &thread_status);
	191	}
	192	}
	193
	194	/* One group of senders and receivers */
	195	static unsigned int group(pthread_t *pth,
	196	unsigned int num_fds,
	197	int ready_out,
	198	int wakefd)
	199	{
	200	unsigned int i;
	201	struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
	202	+ num_fds * sizeof(int));
	203
	204	if (!snd_ctx)
ecdac968	205	err(EXIT_FAILURE, "malloc()");
e27454cc HM	206
	207	for (i = 0; i < num_fds; i++) {
	208	int fds[2];
	209	struct receiver_context ctx = malloc(sizeof(ctx));
	210
	211	if (!ctx)
ecdac968	212	err(EXIT_FAILURE, "malloc()");
e27454cc HM	213
	214
	215	/* Create the pipe between client and server */
	216	fdpair(fds);
	217
b0d22e52	218	ctx->num_packets = num_fds * nr_loops;
e27454cc HM	219	ctx->in_fds[0] = fds[0];
	220	ctx->in_fds[1] = fds[1];
	221	ctx->ready_out = ready_out;
	222	ctx->wakefd = wakefd;
	223
	224	pth[i] = create_worker(ctx, (void *)receiver);
	225
	226	snd_ctx->out_fds[i] = fds[1];
	227	if (!thread_mode)
	228	close(fds[0]);
	229	}
	230
	231	/* Now we have all the fds, fork the senders */
	232	for (i = 0; i < num_fds; i++) {
	233	snd_ctx->ready_out = ready_out;
	234	snd_ctx->wakefd = wakefd;
	235	snd_ctx->num_fds = num_fds;
	236
	237	pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
	238	}
	239
	240	/* Close the fds we have left */
	241	if (!thread_mode)
	242	for (i = 0; i < num_fds; i++)
	243	close(snd_ctx->out_fds[i]);
	244
	245	/* Return number of children to reap */
	246	return num_fds * 2;
	247	}
	248
	249	static const struct option options[] = {
	250	OPT_BOOLEAN('p', "pipe", &use_pipes,
	251	"Use pipe() instead of socketpair()"),
	252	OPT_BOOLEAN('t', "thread", &thread_mode,
	253	"Be multi thread instead of multi process"),
1967936d	254	OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
b0d22e52	255	OPT_UINTEGER('l', "nr_loops", &nr_loops, "Specify the number of loops to run (default: 100)"),
e27454cc HM	256	OPT_END()
	257	};
	258
	259	static const char * const bench_sched_message_usage[] = {
	260	"perf bench sched messaging <options>",
	261	NULL
	262	};
	263
b0ad8ea6	264	int bench_sched_messaging(int argc, const char **argv)
e27454cc HM	265	{
	266	unsigned int i, total_children;
	267	struct timeval start, stop, diff;
	268	unsigned int num_fds = 20;
	269	int readyfds[2], wakefds[2];
	270	char dummy;
	271	pthread_t *pth_tab;
	272
	273	argc = parse_options(argc, argv, options,
	274	bench_sched_message_usage, 0);
	275
	276	pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
	277	if (!pth_tab)
ecdac968	278	err(EXIT_FAILURE, "main:malloc()");
e27454cc HM	279
	280	fdpair(readyfds);
	281	fdpair(wakefds);
	282
	283	total_children = 0;
	284	for (i = 0; i < num_groups; i++)
	285	total_children += group(pth_tab+total_children, num_fds,
	286	readyfds[1], wakefds[0]);
	287
	288	/* Wait for everyone to be ready */
	289	for (i = 0; i < total_children; i++)
	290	if (read(readyfds[0], &dummy, 1) != 1)
ecdac968	291	err(EXIT_FAILURE, "Reading for readyfds");
e27454cc HM	292
	293	gettimeofday(&start, NULL);
	294
	295	/* Kick them off */
	296	if (write(wakefds[1], &dummy, 1) != 1)
ecdac968	297	err(EXIT_FAILURE, "Writing to start them");
e27454cc HM	298
	299	/* Reap them all */
	300	for (i = 0; i < total_children; i++)
	301	reap_worker(pth_tab[i]);
	302
	303	gettimeofday(&stop, NULL);
	304
	305	timersub(&stop, &start, &diff);
	306
cced06c6 HM	307	switch (bench_format) {
cced06c6 HM	308	case BENCH_FORMAT_DEFAULT:
c5659b74	309	printf("# %d sender and receiver %s per group\n",
e27454cc	310	num_fds, thread_mode ? "threads" : "processes");
c5659b74	311	printf("# %d groups == %d %s run\n\n",
e27454cc HM	312	num_groups, num_groups * 2 * num_fds,
e27454cc HM	313	thread_mode ? "threads" : "processes");
c5659b74	314	printf(" %14s: %lu.%03lu [sec]\n", "Total time",
2cd9046c	315	diff.tv_sec,
af15e67e	316	(unsigned long) (diff.tv_usec / USEC_PER_MSEC));
cced06c6 HM	317	break;
cced06c6 HM	318	case BENCH_FORMAT_SIMPLE:
2cd9046c	319	printf("%lu.%03lu\n", diff.tv_sec,
af15e67e	320	(unsigned long) (diff.tv_usec / USEC_PER_MSEC));
cced06c6 HM	321	break;
	322	default:
	323	/* reaching here is something disaster */
	324	fprintf(stderr, "Unknown format:%d\n", bench_format);
	325	exit(1);
	326	break;
e27454cc HM	327	}
e27454cc HM	328
b094c99e DB	329	free(pth_tab);
b094c99e DB	330
e27454cc HM	331	return 0;
e27454cc HM	332	}