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[Raistmer]

There are discrepance still between what CodeXL thinks about Loveland and what clInfo reports:

CodeXL: Wavefront size: 64

clInfo under 14.12 Omega drivers:  Kernel Preferred work group size multiple:     32

Who to trust?

I asked same question many months ago. Answer was if I recall correctly - 64. But 14.12 Omega is newer... and still 32. So, have to ask again...

[dipak]

I've asked someone from CodeXL team about this discrepancy. Will get back to you shortly.

[amitbm · Accepted solution]

The Wavefront size for Loveland is 64.

[Raistmer]

Please  explain why :

Kernel Preferred work group size multiple:     32

What parameter inside this APU makes workgroup multiple of 32 preferable over wavefront size of 64 ?