What is CPU Affinity?

[Koosharem]

You guessed it -- I'm a (brand) newbee!!  Just downloaded Process Lasso 3-4 days ago and still feeling my way around.  For the most part everything I have read that was downloaded with the program has been very helpful.  But I didn't find anything on this "Affinity" thing.

Also,  I couldn't find the customary FAQ department here on the Forum -- I suspect my question might be answered there . . .

I think I've found a great process manager for Windows and, I'm eager to learn how to understand & use it! 

[Jeremy Collake]

Welcome . CPU Affinity is simply the core(s) that the process is allowed to use. The documentation is lacking in places, and does make assumptions at times about prior technical knowledge.

[gamesturbator]

Just to give an example. A lot of games seem to improperly utilize multi-core CPUs. I was having an issue with Shattered Horizon where things just SLOWED down and my frames per second dropped like a stone, resulting in horrible stuttering in my gameplay. Futuremark told me to disable core 0 and sure enough it fixed the problem (no idea why). Some games are better off being assigned a single core  (Bitsum could probably explain why better than I can), especially games that predate quad cores systems.  So say you are using a quad core cpu, with Lasso you can just right-click the game's process and select to have it run off any number of the 4 cores. Hope this helps.

[Koosharem]

My thanks to both gamesturbator & bitsum.support.  Your posts made it all very clear.  I'm still in the "stone age" with a single-core Pentium4! 

[Keefa]

As I recall, the Pentium 4 has Hyper-Threading, so you're not completely safe from assigning affinities, either.