papers/diskperf/appendix.ms

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

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 are met:
 1. Redistributions of source code must retain the above copyright
 notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
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 documentation and/or other materials provided with the distribution.
 3. All advertising materials mentioning features or use of this software
 must display the following acknowledgement:
 This product includes software developed by the University of
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 may be used to endorse or promote products derived from this software
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 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 @(#)appendix.ms 6.2 (Berkeley) 4/16/91

 .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);
}