Re: Linux on AMD K6

Tuomas Heino (
Fri, 11 Jul 1997 17:23:22 +0200 (MET DST)

> What I would like to know is:
> What patches are available for maximizing performance and
> compatibility of AMD K6 cpus with Linux 2.0 and 2.1?

Don't know. If your BIOS enables the "write allocate" feature, everything
should be as fast as possible.

> Is there anything else I should be aware of when using a K6
> linux?

Yes :
1) It flies. It is a lot faster than those Win* benchmarks will admit.
2) If you plan to crunch numbers, try the K6 before you buy : the K6 is a lot
faster than a PPro on some floating point operations, and quite slower on
3) You may have problems with more than 32 Mb of RAM. I've tested two K6, and
both were not very stable with 64 Mb (Expect a message describing this problem
on the list soon). On the other hand, my K6/200 work perfectly at 225 MHz
(3x75) when it only uses 32 Mb.

> Are there are GCC options which will help produce K6 optimzed
> executables?

I have done small benchmarks with the pgcc from,
and found that compiling for the K5 works well, but it is not a lot better
than simply compiling for a 486. Optimizing for pentium does not work well
on a K6.

-- Benoit Poulot-Cazajous