Re: 2.6.0 performance problems

From: Linus Torvalds (torvalds_at_osdl.org)
Date: 12/31/03

  • Next message: John Cherry: "Re: 2.6.0-mm2 (compile stats)" 
    Date:	Tue, 30 Dec 2003 17:01:09 -0800 (PST)
To: Thomas Molina <tmolina@cablespeed.com>

    On Tue, 30 Dec 2003, Thomas Molina wrote:
    >
    > So you are telling me that I am paying the price for running development
    > kernels and enabling all the debugging. I enjoy running the development
    > stuff and testing new stuff. I enabled all the kernel hacking and
    > debugging options with the idea it might be useful for testing purposes.

    It's very useful, but some of the debugging options are literally _very_
    intrusive, and can change usage patterns a lot.

    > Disabling all the debugging stuff brings the numbers down, but things
    > still "feel" worse. It's subjective, but there you are. I'll continue to
    > test with whatever provides the most useful data.

    The VM in 2.6.0 is pretty stable, but it hasn't gotten as much "tweaking"
    as the 2.4.x code. Which tends to show as bad performance under some
    loads.

    The -mm code is likely to help a bit. I've been busy merging the stable
    parts as Andrew sends it today and yesterday.

                    Linus
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