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Scheduling of EU hardware threads to a subslice is "fair"

allanmac1
Beginner
‎08-03-2016 03:28 PM
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I was curious to see how a local work group was distributed across a subslice.

My assumption was that a cooperative group of SIMDxx hardware threads would be assigned to the least occupied EU.

That seems to be the case.

Here is a plot showing a SIMD8 kernel being launched with local work groups of size: 224, 128, 64, 32, 16, 8:

subslice_assignment.png

 

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