Messages in this thread | | | Date | Fri, 25 Jun 2004 12:20:16 -0400 | From | Yaroslav Halchenko <> | Subject | Re: alienware hardware - memory problem? |
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He hey - you're the boss!!!! It helped - 'mem=512M' made the beast fast :-)
Now we just will mangle with /proc/mtrr :-)
THANX AGAIN!
Sincerely Yarik
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 Key http://www.onerussian.com/gpg-yoh.asc GPG fingerprint 3BB6 E124 0643 A615 6F00 6854 8D11 4563 75C0 24C8
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