Helper Thread Affinity

TObject · 2012-07-20, 00:37

How to manually assign CPU affinity to helper threads in Prime95?

The “Worker Windows” dialog allows setting CPU affinity to a worker; but how does one set affinity when a worker uses more than one thread?

Thank you

Dubslow · 2012-07-20, 06:11

Prime95 should be able to do it fairly intelligently.

If not, Ctrl+F "AffinityScramble2" in undoc.txt.

TObject · 2012-07-20, 19:07

I want to prevent Prime95 from affecting my mfaktc performance by landing on hyper threaded cores that share physical cores with the hyper threaded cores used by mfaktc.

I know I can turn off hyper threading, but I use this computer for daily tasks, and with hyper threading enabled the PC is much more responsive.

TObject · 2012-07-20, 19:21

So, if I have 8 logical cores, and I want the two threaded worker thread one use CPU4 and CPU5, then I can set:

AffinityScramble2=45672301

Pretty clever; thank you.

2012-07-20, 00:37	#1
TObject Feb 2012 405₁₀ Posts	Helper Thread Affinity How to manually assign CPU affinity to helper threads in Prime95? The “Worker Windows” dialog allows setting CPU affinity to a worker; but how does one set affinity when a worker uses more than one thread? Thank you

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2012-07-20, 06:11	#2
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 3·29·83 Posts	Prime95 should be able to do it fairly intelligently. If not, Ctrl+F "AffinityScramble2" in undoc.txt.

2012-07-20, 19:07	#3
TObject Feb 2012 3⁴·5 Posts	I want to prevent Prime95 from affecting my mfaktc performance by landing on hyper threaded cores that share physical cores with the hyper threaded cores used by mfaktc. I know I can turn off hyper threading, but I use this computer for daily tasks, and with hyper threading enabled the PC is much more responsive.

2012-07-20, 19:21	#4
TObject Feb 2012 625₈ Posts	So, if I have 8 logical cores, and I want the two threaded worker thread one use CPU4 and CPU5, then I can set: AffinityScramble2=45672301 Pretty clever; thank you.