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    SubjectRe: alienware hardware - memory problem?
    He hey - you're the boss!!!! 
    It helped - 'mem=512M' made the beast fast :-)

    Now we just will mangle with /proc/mtrr :-)



    On Fri, Jun 25, 2004 at 10:54:43AM +0200, Helge Hafting wrote:
    > Yaroslav Halchenko wrote:

    > >because slow down seems to be linked to memory: brk(0) takes on average
    > >0.5-1.5 second, I've decided to run silly memtest...
    > >I have around 1GB total on that beast, I turned off swap and did memtest
    > >1G

    > Memory. Could it be the good old MTRR problem?
    > Try "cat /proc/mtrr" and check that _all_ ordinary memory
    > is covered by a write-back mtrr.

    > Having most of the memory covered lacking a little at the top only
    > is not good enough - you'll see a major slowdown as linux tend to
    > use the topmost memory most and that will be very slow without
    > a MTRR.

    > If it indeed is a mtrr problem, confirm it by booting with mem=<low number>
    > and see that the machine is faster when not using the "slow" memory.
    > After that, get a bios upgrade or echo something useable
    > into /proc/mtrr

    > Helge Hafting

    Yaroslav Halchenko
    Research Assistant, Psychology Department, Rutgers
    Office (973) 353-5440 x263
    Ph.D. Student CS Dept. NJIT
    GPG fingerprint 3BB6 E124 0643 A615 6F00 6854 8D11 4563 75C0 24C8

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