Setting Affinity in windows

[enzo matrix]

I'd like everyone's thoughts on purposely setting affinity of programs and virtual machines to specific core. I see no advantage as windows seems to do a very good job. I suspect it might even degrade performance in most cases.

Thoughts?

 

[king smp]

Depends on version of windows.
On XP it helped my performance with running DVD Flick (encoding/burning) and also with running a VM using VirtualBox.
It wasnt actually the performance of the programs it was the performance of the OS itself.
I did it with using SeeSaw (freeware) and also Task Manager.
I found SeeSaw more versatile.
With that said.with Windows 7 the thread ordering service is sooo much better that I dont see a reason to set affinities.
I also think it is more important when utilizing HyperThreading to set affinities to physical cores.
With DVD Flick the program allows you to set a amount of threads so when I am using the system while encoding I just set it to one thread and two when I am not using it.
I wish more programs let you set amount of threads.
I think Handbrake might let you do it also though I havent used it in awhile.