Jari Maki wrote:

> I´m trying to use Intel G33 chipset (Intel BLKDG33FBC motherboard) with
> intel quad-core, 8 GB RAM and RAID1 with two sata-disks.
>
> My problem is: the Debian Linux is running extreamly slow.
> This problem seems to be G33 chipset-based, the same installation is
> running very fast with other motherboards.
>
> Any ideas how to improve G33 chipset´s performance with Linux?

I don't know that chipset, but if you are sure that it is indeed the chipset
that's slowing your system with this particular installation, I would
recommend trying a more recent kernel, or building one of your own.

Although this may not be related to your specific problem - I don't even
know what kernel you're running - there appears to be a patch to the SLUB
allocator in the 2.6.24.x generation of kernels which greatly slows down
multi-CPU machines. The patch has been reverted for the experimental
2.6.15-rc2 kernel, so chances are that the slightly older 2.6.23.x kernel
or an eventual upcoming 2.6.24.3 will have this fixed as well.

On the other hand, if you decide to build your own kernel from scratch using
the current 2.6.24.2 vanilla kernel, then you could opt for SLAB instead of
SLUB. SLAB is older and perhaps a little less memory-efficient - not that
this should be a problem on a 64-bit machine with 8 GB of RAM - but in this
particular case it would give you better performance.

Hope this was helpful... ;-)
--
Aragorn
(registered GNU/Linux user #223157)

Aragorn wrote:

> [...]
>
> Although this may not be related to your specific problem - I don't even
> know what kernel you're running - there appears to be a patch to the SLUB
> allocator in the 2.6.24.x generation of kernels which greatly slows down
> multi-CPU machines. The patch has been reverted for the experimental
> 2.6.15-rc2 kernel, so chances are that the slightly older 2.6.23.x kernel
> or an eventual upcoming 2.6.24.3 will have this fixed as well.

Oops, the experimental kernel mentioned there would of course be 2.6.25-rc2.
Typo, my mistake. ;-)

--
Aragorn
(registered GNU/Linux user #223157)