Ok guys,

I got both fixes to work now, using this batch (and extending it until CPU 16)

Quote Originally Posted by mibo
>cpu 1
>wrmsr 0xc0010015 0 0x01000010
>wrmsr 0xc0011023 0 0x00200020
>cpu 2
>wrmsr 0xc0010015 0 0x01000010
>wrmsr 0xc0011023 0 0x00200020
>cpu 3
>wrmsr 0xc0010015 0 0x01000010
>wrmsr 0xc0011023 0 0x00200020
>cpu 4
>wrmsr 0xc0010015 0 0x01000010
>wrmsr 0xc0011023 0 0x00200020
>rwexit
To give you an idea of what changed - first up, stock (well not really stock ) Quad Opteron 8347HE:



Yeah, it sucks. Big time.

Next up: Changing the 0xC0010015 register from 0x01000018 to 0x01000010 on all cores:




Yay! Latency still sucks, but overall a big improvement.

And, one step further: Changing 0xC0011023 register from 0x00A00022 to 0x00200020 (not sure if I should change the A in there? oh well it works)



Now that's even better. Note how it improves the L3 cache latency.


Some real world number improvements:

1. Winrar: No fix: 270KB/s - Fix 1: 1630KB/s - Fix 2: 1660KB/s
2. Cinebench: No fix: 14600 xCPU - Fix 2 - 19000 xCPU

Will try more

A HUGE thank you goes out to mreuter80 for being spot-on with his analysis and pointing me in the right direction!