Re: K7/Athlon optimizations and Sacrifices to the Great Ones.

[Heinz Deinhart]

On Thu, 6 Sep 2001, Dan Hollis wrote:

> Anyone yet verified if burnMMX2 causes the same failures the
> athlon-optimized kernel does?

several versions of Robert's burnMMX2 run on by problematic athlons
without failing for several hours.

I did some trial and error modifications to mmx.c and found out
that this one makes my athlons happy (but must admin i have
no clue why). it seems to run stable now.

--- linux-2.4.9/arch/i386/lib/mmx.c	Tue May 22 19:23:16 2001
+++ linux-2.4.9-ac6-hack/arch/i386/lib/mmx.c	Sat Sep  8 00:51:33 2001
@@ -194,6 +194,9 @@
 		: : "r" (from), "r" (to) : "memory");
 		from+=64;
 		to+=64;
+	__asm__ __volatile__ (
+		"  sfence \n" : :
+	);
 	}
 	for(i=(4096-320)/64; i<4096/64; i++)
 	{

maybe someone with more knowledge can take a look..

ciao,
heinz

-- 
Heinz Deinhart <[e-mail]>
[phone]
Technische Universitaet Wien, Dept. E183/1