Messages in this thread |  | | Date | Thu, 15 Nov 2001 19:37:17 +0000 | From | "Stephen C. Tweedie" <> | Subject | Re: Athlon SMP blues - kernels 2.4.[9 13 15-pre4] |
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Hi,
On Wed, Nov 14, 2001 at 03:08:25PM +0000, Matt Bernstein wrote:
> I hope they do; I've just set up a very similar beast (looks like the same > mobo and same CPUs). Is the RAM "registered" ECC? Are your CPUs the same > stepping? One problem we were bitten by was the Radeon DRI, so we disabled > it (in XF86Config-4) and it now seems to at least boot into X.
There are known problems in AMD760+Radeon setups, and a workaround is to avoid asserting RADEON_SOFT_RESET_HBP during init. The latest kernels have that fix in the radeon drm. Using that in conjunction with an X server containing the same fix, I've finally got a stable 761+radeon setup here.
I think the X server fix went in on the 4.1.99 branch, but I know that at least the Red Hat XFree86-4.1 rpms have got the patch back-ported.
> it's not any faster than a dual PIII (1GHz) at the task it's meant to > perform :( both CPUs report 75% usage, and vmstat 1 doesn't show the IO > systems being slugged. Very strange. We're wondering if we've hit memory > bandwidth as the tasks involve some hard sums with big matrices.
If the CPUs were bottlenecked on memory then they would still be pegged at 100% according to the OS. They'd just get less work done in a given interval.
Cheers, Stephen - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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