papers/diskperf/appendix.ms

         Copyright (c) 1983 The Regents of the University of California.
 All rights reserved.

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 .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);
}