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SubjectRe: Fwd: VM testing with mtest, 2.4.12-ac3, 2.4.12-ac3+riel's patches, and 2.4.13aa1
On Oct 18, 2001  01:51 -0500, Josh McKinney wrote:
> This is a report of the mtest01 scripts posted by rwhron@earthlink.net
> a day orso ago.
>
> The numbers are rather interesting. While the latency of the ac kernels is
> definitely better, the song only dropped out for a second or two in the
> begining but that was it. The aa kernel drops out more frequently throughout
> the test, but the amount of memory allocated is almost twice as much as with
> the ac kernels.

-ac kernel:
> Averages for 10 mtest01 runs
> bytes allocated: 134427443.2
> User time (seconds): 2.546
> System time (seconds): 1.370
> Elapsed (wall clock) time: 4.798
> Percent of CPU this job got: 89.1%
> Major (requiring I/O) page faults: 103.8
> Minor (reclaiming a frame) faults: 32702

-ac kernel + Rik's patches:
> Averages for 10 mtest01 runs
> bytes allocated: 124885401.6
> User time (seconds): 2.380
> System time (seconds): 1.253
> Elapsed (wall clock) time: 4.401
> Percent of CPU this job got: 89.1%
> Major (requiring I/O) page faults: 100.2
> Minor (reclaiming a frame) faults: 30363.3

Linus kernel:
> Averages for 10 mtest01 runs
> bytes allocated: 288148684.8
> User time (seconds): 5.496
> System time (seconds): 3.003
> Elapsed (wall clock) time: 12.250
> Percent of CPU this job got: 68.9%
> Major (requiring I/O) page faults: 103.5
> Minor (reclaiming a frame) faults: 70380.6

Note that the Linus kernel has allocated twice as much memory. What does that
mean exactly? The user/system/wall time is also twice as high. Somehow I
don't think you are having an equal test.

Cheers, Andreas
--
Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto,
\ would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert

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