Re: 1352 NUL bytes at the end of a page? (was Re: Assertion `s && s->tree' failed: The saga continues.)

From: Andrew Morton (akpm_at_osdl.org)
Date: 05/16/04

  • Next message: Christoph Hellwig: "Re: alpha fp-emu vs module refcounting" 
    Date:	Sun, 16 May 2004 03:01:36 -0700
To: Steven Cole <elenstev@mesatop.com>

    Steven Cole <elenstev@mesatop.com> wrote:
    >
    > The script only reported one
    > iteration finished, while I got it to do 36 iterations over several hours earlier
    > today (with a 2.6.3-4mdk vendor kernel), so I'm going to add some timing
    > tests to the script to see if things are really slowing down with current kernels,
    > or if it's just my worried imaginings.

    I did a bit of testing on a 256MB laptop with a fairly slow disk, ext3.
    Three iterations of the test took:

    2.6.6: 1055.53s user 327.14s system 32% cpu 1:10:06.71 total

    2.4.27-pre2: 1042.03s user 307.21s system 32% cpu 1:09:46.00 total

    2.6.3: 1053.23s user 326.16s system 27% cpu 1:22:07.24 total

    So there's nothing particularly wild there. It's possible I guess that the
    2.6 VM is very sucky but something else made up for it - possibly the
    anticipatory scheduler but more likely the Orlov allocator.

    You're using reiserfs, yes?

    Are you sure the IDE disks are in DMA mode?
    -
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  • Next message: Christoph Hellwig: "Re: alpha fp-emu vs module refcounting"

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