Messages in this thread | | | Date | Wed, 27 Sep 2000 16:10:38 +1000 | From | Robert Cohen <> | Subject | Re: [Demo program]: Poor elevator performance in 2.4.0-test9pre6 |
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html> <br>lists@frednet.dyndns.org wrote <p><u>I doubt this has any relevance whatsoever, but when I try this on a 2.2.16</u> <br><u>kernel running on top of a Pentium Pro 200 w/96megs of mem w/ a SCSI 2</u> <br><u>disk, I get some funny numbers:</u> <p><u>matt@zeus:~/cwork/personal$ ./elv_test 8 30</u> <br><u>files created, 240 megs written at 4.32 megs/sec</u> <br><u>finished writing 240 megs written at 1794.23 megs per sec</u> <br><u>finished reading, 240 megs read at 1675.813817 megs/sec</u> <p><u>Any ideas why I would be getting these numbers?</u> <br><u>-</u><u></u> <p>That will teach me to play fast and loose with checking error returns from system calls. I wasnt specifying a mode when creating the files. <br>So they were being created without user write permission.. <br>I dont know why it worked under 2.4.0. Maybe a kernel bug :-). <p>Anyway, a new version is available now at <A HREF="http://tltsu.anu.edu.au/~robert/elv_test.c">http://tltsu.anu.edu.au/~robert/elv_test.c</A> <p>Robert Cohen <br>TLTSU, Unix support <br>Australian National University</html>
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