tools/perf/bench/sched-messaging.c - linux - Git at Google

 // 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 <subcmd/parse-options.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/list.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;
 static unsigned int total_children = 0;
 static struct list_head sender_contexts = LIST_HEAD_INIT(sender_contexts);
 static struct list_head receiver_contexts = LIST_HEAD_INIT(receiver_contexts);

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

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

 union messaging_worker {
 	pthread_t thread;
 	pid_t pid;
 };

 static union messaging_worker *worker_tab;

 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)
 {
 	struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };

 	/* Tell them we're ready. */
 	if (write(ready_out, "R", 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);
 	memset(data, 'S', sizeof(data));

 	/* 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 void create_thread_worker(union messaging_worker *worker,
 				 void *ctx, void *(*func)(void *))
 {
 	pthread_attr_t attr;
 	int ret;

 	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(&worker->thread, &attr, func, ctx);
 	if (ret != 0)
 		err(EXIT_FAILURE, "pthread_create failed");

 	pthread_attr_destroy(&attr);
 }

 static void create_process_worker(union messaging_worker *worker,
 				  void *ctx, void *(*func)(void *))
 {
 	/* Fork the receiver. */
 	worker->pid = fork();

 	if (worker->pid == -1) {
 		err(EXIT_FAILURE, "fork()");
 	} else if (worker->pid == 0) {
 		(*func) (ctx);
 		exit(0);
 	}
 }

 static void create_worker(union messaging_worker *worker,
 			  void *ctx, void *(*func)(void *))
 {
 	if (!thread_mode)
 		return create_process_worker(worker, ctx, func);
 	else
 		return create_thread_worker(worker, ctx, func);
 }

 static void reap_worker(union messaging_worker *worker)
 {
 	int proc_status;
 	void *thread_status;

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

 /* One group of senders and receivers */
 static unsigned int group(union messaging_worker *worker,
 		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()");

 	list_add(&snd_ctx->list, &sender_contexts);
 	for (i = 0; i < num_fds; i++) {
 		int fds[2];
 		struct receiver_context *ctx = malloc(sizeof(*ctx));

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

 		list_add(&ctx->list, &receiver_contexts);

 		/* 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;

 		create_worker(worker + i, 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;

 		create_worker(worker + num_fds + i, 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 void sig_handler(int sig __maybe_unused)
 {
 	unsigned int i;

 	/*
 	 * When exit abnormally, kill all forked child processes.
 	 */
 	for (i = 0; i < total_children; i++)
 		kill(worker_tab[i].pid, SIGKILL);
 }

 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;
 	struct timeval start, stop, diff;
 	unsigned int num_fds = 20;
 	int readyfds[2], wakefds[2];
 	char dummy;
 	struct sender_context *pos, *n;

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

 	worker_tab = malloc(num_fds * 2 * num_groups * sizeof(union messaging_worker));
 	if (!worker_tab)
 		err(EXIT_FAILURE, "main:malloc()");

 	fdpair(readyfds);
 	fdpair(wakefds);

 	if (!thread_mode) {
 		signal(SIGINT, sig_handler);
 		signal(SIGTERM, sig_handler);
 	}

 	for (i = 0; i < num_groups; i++)
 		total_children += group(worker_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(worker_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",
 		       (unsigned long) diff.tv_sec,
 		       (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
 		break;
 	case BENCH_FORMAT_SIMPLE:
 		printf("%lu.%03lu\n", (unsigned long) 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(worker_tab);
 	list_for_each_entry_safe(pos, n, &sender_contexts, list) {
 		list_del_init(&pos->list);
 		free(pos);
 	}
 	list_for_each_entry_safe(pos, n, &receiver_contexts, list) {
 		list_del_init(&pos->list);
 		free(pos);
 	}
 	return 0;
 }
	// 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 <subcmd/parse-options.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/list.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;
	static unsigned int total_children = 0;
	static struct list_head sender_contexts = LIST_HEAD_INIT(sender_contexts);
	static struct list_head receiver_contexts = LIST_HEAD_INIT(receiver_contexts);

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

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

	union messaging_worker {
	pthread_t thread;
	pid_t pid;
	};

	static union messaging_worker *worker_tab;

	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)
	{
	struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };

	/* Tell them we're ready. */
	if (write(ready_out, "R", 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);
	memset(data, 'S', sizeof(data));

	/* 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 void create_thread_worker(union messaging_worker *worker,
	void ctx, void (func)(void ))
	{
	pthread_attr_t attr;
	int ret;

	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(&worker->thread, &attr, func, ctx);
	if (ret != 0)
	err(EXIT_FAILURE, "pthread_create failed");

	pthread_attr_destroy(&attr);
	}

	static void create_process_worker(union messaging_worker *worker,
	void ctx, void (func)(void ))
	{
	/* Fork the receiver. */
	worker->pid = fork();

	if (worker->pid == -1) {
	err(EXIT_FAILURE, "fork()");
	} else if (worker->pid == 0) {
	(*func) (ctx);
	exit(0);
	}
	}

	static void create_worker(union messaging_worker *worker,
	void ctx, void (func)(void ))
	{
	if (!thread_mode)
	return create_process_worker(worker, ctx, func);
	else
	return create_thread_worker(worker, ctx, func);
	}

	static void reap_worker(union messaging_worker *worker)
	{
	int proc_status;
	void *thread_status;

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

	/* One group of senders and receivers */
	static unsigned int group(union messaging_worker *worker,
	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()");

	list_add(&snd_ctx->list, &sender_contexts);
	for (i = 0; i < num_fds; i++) {
	int fds[2];
	struct receiver_context ctx = malloc(sizeof(ctx));

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

	list_add(&ctx->list, &receiver_contexts);

	/* 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;

	create_worker(worker + i, 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;

	create_worker(worker + num_fds + i, 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 void sig_handler(int sig __maybe_unused)
	{
	unsigned int i;

	/*
	* When exit abnormally, kill all forked child processes.
	*/
	for (i = 0; i < total_children; i++)
	kill(worker_tab[i].pid, SIGKILL);
	}

	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;
	struct timeval start, stop, diff;
	unsigned int num_fds = 20;
	int readyfds[2], wakefds[2];
	char dummy;
	struct sender_context pos, n;

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

	worker_tab = malloc(num_fds * 2 * num_groups * sizeof(union messaging_worker));
	if (!worker_tab)
	err(EXIT_FAILURE, "main:malloc()");

	fdpair(readyfds);
	fdpair(wakefds);

	if (!thread_mode) {
	signal(SIGINT, sig_handler);
	signal(SIGTERM, sig_handler);
	}

	for (i = 0; i < num_groups; i++)
	total_children += group(worker_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(worker_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",
	(unsigned long) diff.tv_sec,
	(unsigned long) (diff.tv_usec / USEC_PER_MSEC));
	break;
	case BENCH_FORMAT_SIMPLE:
	printf("%lu.%03lu\n", (unsigned long) 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(worker_tab);
	list_for_each_entry_safe(pos, n, &sender_contexts, list) {
	list_del_init(&pos->list);
	free(pos);
	}
	list_for_each_entry_safe(pos, n, &receiver_contexts, list) {
	list_del_init(&pos->list);
	free(pos);
	}
	return 0;
	}