Re: Fwd: VM testing with mtest, 2.4.12-ac3, 2.4.12-ac3+riel's patches, and 2.4.13aa1

Andreas Dilger (adilger@turbolabs.com)
Thu, 18 Oct 2001 09:06:46 -0600


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

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/