freebsd-dev/share/doc/papers/diskperf/appendix.ms

.\" Copyright (c) 1983 The Regents of the University of California.
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.\"	@(#)appendix.ms	6.2 (Berkeley) 4/16/91
.\"
.\" .nr H2 1
.ds RH Appendix A
.NH
\s+2Appendix A\s0
.NH 2
read_8192
.PP
.DS
#define	BUFSIZ 8192
main( argc, argv)
char **argv;
{
	char buf[BUFSIZ];
	int i, j;

	j = open(argv[1], 0);
	for (i = 0; i < 1024; i++)
		read(j, buf, BUFSIZ);
}
.DE
.NH 2
write_4096
.PP
.DS
#define	BUFSIZ 4096
main( argc, argv)
char **argv;
{
	char buf[BUFSIZ];
	int i, j;

	j = creat(argv[1], 0666);
	for (i = 0; i < 2048; i++)
		write(j, buf, BUFSIZ);
}
.DE
.NH 2
write_8192
.PP
.DS
#define	BUFSIZ 8192
main( argc, argv)
char **argv;
{
	char buf[BUFSIZ];
	int i, j;

	j = creat(argv[1], 0666);
	for (i = 0; i < 1024; i++)
		write(j, buf, BUFSIZ);
}
.DE
.bp
.NH 2
rewrite_8192
.PP
.DS
#define	BUFSIZ 8192
main( argc, argv)
char **argv;
{
	char buf[BUFSIZ];
	int i, j;

	j = open(argv[1], 2);
	for (i = 0; i < 1024; i++)
		write(j, buf, BUFSIZ);
}
.DE