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

/*
 *
 * 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 "../util/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 <sys/poll.h>
#include <limits.h>

#define DATASIZE 100

static bool use_pipes = false;
static unsigned int 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 barf(const char *msg)
{
	fprintf(stderr, "%s (error: %s)\n", msg, strerror(errno));
	exit(1);
}

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;
	}

	barf(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)
		barf("CLIENT: ready write");

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

/* Sender sprays 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 < 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)
				barf("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)
			barf("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 err;

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

		return (pthread_t)0;
	}

	if (pthread_attr_init(&attr) != 0)
		barf("pthread_attr_init:");

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

	err = pthread_create(&childid, &attr, func, ctx);
	if (err != 0) {
		fprintf(stderr, "pthread_create failed: %s (%d)\n",
			strerror(err), err);
		exit(-1);
	}
	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)
		barf("malloc()");

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

		if (!ctx)
			barf("malloc()");


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

		ctx->num_packets = num_fds * 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', "loop", &loops, "Specify number of loops"),
	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,
		    const char *prefix __maybe_unused)
{
	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)
		barf("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)
			barf("Reading for readyfds");

	gettimeofday(&start, NULL);

	/* Kick them off */
	if (write(wakefds[1], &dummy, 1) != 1)
		barf("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/1000));
		break;
	case BENCH_FORMAT_SIMPLE:
		printf("%lu.%03lu\n", diff.tv_sec,
		       (unsigned long) (diff.tv_usec/1000));
		break;
	default:
		/* reaching here is something disaster */
		fprintf(stderr, "Unknown format:%d\n", bench_format);
		exit(1);
		break;
	}

	return 0;
}
Commit	Line	Data
e27454cc HM	1	/*
e27454cc HM	2	*
2044279d	3	* sched-messaging.c
e27454cc HM	4	*
	5	* messaging: Benchmark for scheduler and IPC mechanisms
	6	*
	7	* Based on hackbench by Rusty Russell <rusty@rustcorp.com.au>
	8	* Ported to perf by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
	9	*
	10	*/
	11
	12	#include "../perf.h"
	13	#include "../util/util.h"
	14	#include "../util/parse-options.h"
	15	#include "../builtin.h"
	16	#include "bench.h"
	17
	18	/* Test groups of 20 processes spraying to 20 receivers */
	19	#include <pthread.h>
	20	#include <stdio.h>
	21	#include <stdlib.h>
	22	#include <string.h>
	23	#include <errno.h>
	24	#include <unistd.h>
	25	#include <sys/types.h>
	26	#include <sys/socket.h>
	27	#include <sys/wait.h>
	28	#include <sys/time.h>
	29	#include <sys/poll.h>
	30	#include <limits.h>
	31
	32	#define DATASIZE 100
	33
c0555642	34	static bool use_pipes = false;
e27454cc	35	static unsigned int loops = 100;
c0555642	36	static bool thread_mode = false;
e27454cc	37	static unsigned int num_groups = 10;
e27454cc HM	38
	39	struct sender_context {
	40	unsigned int num_fds;
	41	int ready_out;
	42	int wakefd;
	43	int out_fds[0];
	44	};
	45
	46	struct receiver_context {
	47	unsigned int num_packets;
	48	int in_fds[2];
	49	int ready_out;
	50	int wakefd;
	51	};
	52
	53	static void barf(const char *msg)
	54	{
	55	fprintf(stderr, "%s (error: %s)\n", msg, strerror(errno));
	56	exit(1);
	57	}
	58
	59	static void fdpair(int fds[2])
	60	{
	61	if (use_pipes) {
	62	if (pipe(fds) == 0)
	63	return;
	64	} else {
	65	if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0)
	66	return;
	67	}
	68
	69	barf(use_pipes ? "pipe()" : "socketpair()");
	70	}
	71
	72	/* Block until we're ready to go */
	73	static void ready(int ready_out, int wakefd)
	74	{
	75	char dummy;
	76	struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
	77
	78	/* Tell them we're ready. */
	79	if (write(ready_out, &dummy, 1) != 1)
	80	barf("CLIENT: ready write");
	81
	82	/* Wait for "GO" signal */
	83	if (poll(&pollfd, 1, -1) != 1)
	84	barf("poll");
	85	}
	86
	87	/* Sender sprays loops messages down each file descriptor */
	88	static void sender(struct sender_context ctx)
	89	{
	90	char data[DATASIZE];
	91	unsigned int i, j;
	92
	93	ready(ctx->ready_out, ctx->wakefd);
	94
	95	/* Now pump to every receiver. */
	96	for (i = 0; i < loops; i++) {
	97	for (j = 0; j < ctx->num_fds; j++) {
	98	int ret, done = 0;
	99
	100	again:
	101	ret = write(ctx->out_fds[j], data + done,
102	sizeof(data)-done);
103	if (ret < 0)
104	barf("SENDER: write");
105	done += ret;
106	if (done < DATASIZE)
107	goto again;
108	}
109	}
110
111	return NULL;
112	}
113
114
115	/* One receiver per fd */
116	static void receiver(struct receiver_context ctx)
117	{
118	unsigned int i;
119
120	if (!thread_mode)
121	close(ctx->in_fds[1]);
122
123	/* Wait for start... */
124	ready(ctx->ready_out, ctx->wakefd);
125
126	/* Receive them all */
127	for (i = 0; i < ctx->num_packets; i++) {
128	char data[DATASIZE];
129	int ret, done = 0;
130
131	again:
132	ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
133	if (ret < 0)
134	barf("SERVER: read");
135	done += ret;
136	if (done < DATASIZE)
137	goto again;
138	}
139
140	return NULL;
141	}
142
143	static pthread_t create_worker(void ctx, void (func)(void ))
144	{
145	pthread_attr_t attr;
146	pthread_t childid;
147	int err;
148
149	if (!thread_mode) {
150	/* process mode */
151	/* Fork the receiver. */
152	switch (fork()) {
153	case -1:
154	barf("fork()");
155	break;
156	case 0:
157	(*func) (ctx);
158	exit(0);
159	break;
160	default:
161	break;
162	}
163
164	return (pthread_t)0;
165	}
166
167	if (pthread_attr_init(&attr) != 0)
168	barf("pthread_attr_init:");
169
170	#ifndef __ia64__
171	if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
172	barf("pthread_attr_setstacksize");
173	#endif
174
175	err = pthread_create(&childid, &attr, func, ctx);
176	if (err != 0) {
177	fprintf(stderr, "pthread_create failed: %s (%d)\n",
178	strerror(err), err);
179	exit(-1);
180	}
181	return childid;
182	}
183
184	static void reap_worker(pthread_t id)
185	{
186	int proc_status;
187	void *thread_status;
188
189	if (!thread_mode) {
190	/* process mode */
191	wait(&proc_status);
192	if (!WIFEXITED(proc_status))
193	exit(1);
194	} else {
195	pthread_join(id, &thread_status);
196	}
197	}
198
199	/* One group of senders and receivers */
200	static unsigned int group(pthread_t *pth,
201	unsigned int num_fds,
202	int ready_out,
203	int wakefd)
204	{
205	unsigned int i;
206	struct sender_context *snd_ctx = malloc(sizeof(struct sender_context)
207	+ num_fds * sizeof(int));
208
209	if (!snd_ctx)
210	barf("malloc()");
211
212	for (i = 0; i < num_fds; i++) {
213	int fds[2];
214	struct receiver_context ctx = malloc(sizeof(ctx));
215
216	if (!ctx)
217	barf("malloc()");
218
219
220	/* Create the pipe between client and server */
221	fdpair(fds);
222
223	ctx->num_packets = num_fds * loops;
224	ctx->in_fds[0] = fds[0];
225	ctx->in_fds[1] = fds[1];
226	ctx->ready_out = ready_out;
227	ctx->wakefd = wakefd;
228
229	pth[i] = create_worker(ctx, (void *)receiver);
230
231	snd_ctx->out_fds[i] = fds[1];
232	if (!thread_mode)
233	close(fds[0]);
234	}
235
236	/* Now we have all the fds, fork the senders */
237	for (i = 0; i < num_fds; i++) {
238	snd_ctx->ready_out = ready_out;
239	snd_ctx->wakefd = wakefd;
240	snd_ctx->num_fds = num_fds;
241
242	pth[num_fds+i] = create_worker(snd_ctx, (void *)sender);
243	}
244
245	/* Close the fds we have left */
246	if (!thread_mode)
247	for (i = 0; i < num_fds; i++)
248	close(snd_ctx->out_fds[i]);
249
250	/* Return number of children to reap */
251	return num_fds * 2;
252	}
253
254	static const struct option options[] = {
255	OPT_BOOLEAN('p', "pipe", &use_pipes,
256	"Use pipe() instead of socketpair()"),
257	OPT_BOOLEAN('t', "thread", &thread_mode,
258	"Be multi thread instead of multi process"),
1967936d ACM	259	OPT_UINTEGER('g', "group", &num_groups, "Specify number of groups"),
1967936d ACM	260	OPT_UINTEGER('l', "loop", &loops, "Specify number of loops"),
e27454cc HM	261	OPT_END()
	262	};
	263
	264	static const char * const bench_sched_message_usage[] = {
	265	"perf bench sched messaging <options>",
	266	NULL
	267	};
	268
	269	int bench_sched_messaging(int argc, const char **argv,
1d037ca1	270	const char *prefix __maybe_unused)
e27454cc HM	271	{
	272	unsigned int i, total_children;
	273	struct timeval start, stop, diff;
	274	unsigned int num_fds = 20;
	275	int readyfds[2], wakefds[2];
	276	char dummy;
	277	pthread_t *pth_tab;
	278
	279	argc = parse_options(argc, argv, options,
	280	bench_sched_message_usage, 0);
	281
	282	pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
	283	if (!pth_tab)
	284	barf("main:malloc()");
	285
	286	fdpair(readyfds);
	287	fdpair(wakefds);
	288
	289	total_children = 0;
	290	for (i = 0; i < num_groups; i++)
	291	total_children += group(pth_tab+total_children, num_fds,
	292	readyfds[1], wakefds[0]);
	293
	294	/* Wait for everyone to be ready */
	295	for (i = 0; i < total_children; i++)
	296	if (read(readyfds[0], &dummy, 1) != 1)
	297	barf("Reading for readyfds");
	298
	299	gettimeofday(&start, NULL);
	300
	301	/* Kick them off */
	302	if (write(wakefds[1], &dummy, 1) != 1)
	303	barf("Writing to start them");
	304
	305	/* Reap them all */
	306	for (i = 0; i < total_children; i++)
	307	reap_worker(pth_tab[i]);
	308
	309	gettimeofday(&stop, NULL);
	310
	311	timersub(&stop, &start, &diff);
	312
cced06c6 HM	313	switch (bench_format) {
cced06c6 HM	314	case BENCH_FORMAT_DEFAULT:
c5659b74	315	printf("# %d sender and receiver %s per group\n",
e27454cc	316	num_fds, thread_mode ? "threads" : "processes");
c5659b74	317	printf("# %d groups == %d %s run\n\n",
e27454cc HM	318	num_groups, num_groups * 2 * num_fds,
e27454cc HM	319	thread_mode ? "threads" : "processes");
c5659b74	320	printf(" %14s: %lu.%03lu [sec]\n", "Total time",
2cd9046c DM	321	diff.tv_sec,
2cd9046c DM	322	(unsigned long) (diff.tv_usec/1000));
cced06c6 HM	323	break;
cced06c6 HM	324	case BENCH_FORMAT_SIMPLE:
2cd9046c DM	325	printf("%lu.%03lu\n", diff.tv_sec,
2cd9046c DM	326	(unsigned long) (diff.tv_usec/1000));
cced06c6 HM	327	break;
	328	default:
	329	/* reaching here is something disaster */
	330	fprintf(stderr, "Unknown format:%d\n", bench_format);
	331	exit(1);
	332	break;
e27454cc HM	333	}
	334
	335	return 0;
	336	}