[unix-history] / usr / src / sys / tests / benchmarks / pipediscard.c

/*
 * IPC benchmarkl,
 * write and discard using pipes.
 */

main(argc, argv)
	char *argv[];
{
	char buf[512];
	int fd[2], msgsize;
	register int i, iter;

	if (argc < 3) {
		printf("usage: %s iterations message-size\n", argv[0]);
		exit(1);
	}
	argc--, argv++;
	iter = atoi(*argv);
	argc--, argv++;
	msgsize = atoi(*argv);
	if (msgsize > sizeof (buf) || msgsize <= 0) {
		printf("%s: Bad message size.\n", *argv);
		exit(2);
	}
	if (pipe(fd) < 0) {
		perror("pipe");
		exit(3);
	}
	if (fork() == 0)
		for (i = 0; i < iter; i++)
			read(fd[0], buf, msgsize);
	else
		for (i = 0; i < iter; i++)
			write(fd[1], buf, msgsize);
}
Commit	Line	Data
3c1f50a7 C	1	/*
	2	* IPC benchmarkl,
	3	* write and discard using pipes.
	4	*/
	5
	6	main(argc, argv)
	7	char *argv[];
	8	{
	9	char buf[512];
	10	int fd[2], msgsize;
	11	register int i, iter;
	12
	13	if (argc < 3) {
	14	printf("usage: %s iterations message-size\n", argv[0]);
	15	exit(1);
	16	}
	17	argc--, argv++;
	18	iter = atoi(*argv);
	19	argc--, argv++;
	20	msgsize = atoi(*argv);
	21	if (msgsize > sizeof (buf) \|\| msgsize <= 0) {
	22	printf("%s: Bad message size.\n", *argv);
	23	exit(2);
	24	}
	25	if (pipe(fd) < 0) {
	26	perror("pipe");
	27	exit(3);
	28	}
	29	if (fork() == 0)
	30	for (i = 0; i < iter; i++)
	31	read(fd[0], buf, msgsize);
	32	else
	33	for (i = 0; i < iter; i++)
	34	write(fd[1], buf, msgsize);
	35	}