papers/diskperf/appendix.ms

         Copyright (c) 1983 Regents of the University of California.
 All rights reserved. The Berkeley software License Agreement
 specifies the terms and conditions for redistribution.

 @(#)appendix.ms 6.1 (Berkeley) 04/20/86

.nr H2 1
\s+2Appendix A\s0
read_8192

#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);
}

write_4096

#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);
}

write_8192

#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);
}

.bp
rewrite_8192

#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);
}