Setting Affinity for VSX

Discovered this cool thing while setting affinities for CoreXL in VSX. I have not seen this documented anywhere and it is so critical to setting the affinities correctly. Not sure why they don’t document this so.

When setting affinties for VSX, there is a specific hierarchy:

  1. (V)s – is the king
  2. (P)rocess – is the queen
  3. (I)instance – is the jack


When you set affinity for the the VS, you are setting affinity for ALL!!! the threads of the VS in user space including the helper threads (FWD,CPD,VPD):


When you set affinity for the fwk INSIDE of a VS, you are setting the (P) process affinity for ALL of the instances of that (P)process which is the fwk:

v and I affinity

And finally when you set the affinity for the fwk instance or as I call it the VSi instance, you are setting the affinity for a specific thread of the fwk (above). NOTE: you have to be in the VS environment to set the instance affinity.

You can see the results in the output below.  Each of the affinities indicate what command set its affinity:


and guess where this information is stored???


Cool huh???

And if you really are a Linux affinity geek you’d know what this is all about:


VSX over and OUT!

You’d see a lot more of this if you took my class!


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Life Stories from Dreez

These are stories from my travels. Generally I like to write stories about local people that I meet and also brag about living the retirement dream with my #1 wife Gaby. She is also my only wife.

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