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HeikoAnkenbrand
Champion
Champion

VSX Affinity Question?

I have tested a lot in the lab with vsx and affinity over the last days. Now a question has come up which I cannot explain 100%.

Way 1:
When I search the internet, they all say that the CoreXL instances must be assigned to the Core's. Typical assignment:
fw ctl affinity -s -d -vsid 0 -cpu 1
fw ctl affinity -s -d -vsid 1 -cpu 1
fw ctl affinity -s -d -vsid 2 -cpu 2
fw ctl affinity -s -d -vsid 3 -cpu 3

After that my affinity looks like this:
vsx2.JPG

Way 2:
From my point of view, it would be better to distribute the fwk process to the cores as well. For this purpose I have set the following:
fw ctl affinity -s -d -pname fwk -vsid 0 -cpu 1
fw ctl affinity -s -d -pname fwk -vsid 1 -cpu 1
fw ctl affinity -s -d -pname fwk -vsid 2 -cpu 2
fw ctl affinity -s -d -pname fwk -vsid 3 -cpu 3

Here the affinity looks as follows:
vsx3.JPG

Now the question arises for me, which of the two ways is the better one?


PS:
Top shows the fwkX processes:
vsx4.JPG

A small calculation sample for the utilization of process fwkX:

vsx5.JPG

- fwk0_X -> fw instance thread that takes care for the packet processing
- fwk0_dev_X -> the thread that takes care for communication between fw instances and other CP daemons
- fwk0_kissd -> legacy Kernel Infrastructure (obsolete)
- fwk0_hp -> (high priority) cluster thread

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