Cycles AMD HIP device feedback

[Alaska]

@B4rr3l

Very nice, finally working on Linux, only funny thing is that CPU won´t add any performance on the rendering despite being used at 99% most of the render time

@Funnybob

I’m now running GPU on my iMac Pro Vega 64. I see there’s an option to render with GPU or GPU and CPU in the metal prefs. I though adding the CPU would make a big difference but for render time it’s negligible. But for the memory, If I look at the peak, GPU only took twice as much memory. I don’t understand why.

Funnybob, the information found below is still relevant for you. However, for future reference feedback on Metal should go the Metal feedback thread. Cycles Apple Metal device feedback - #340 by S.I

Cycles-X in it’s current form less than ideally schedules work between multiple devices of varying performance in scenes with varying complexity across the frame. As such, enabling CPU + GPU usually doesn’t give people the performance increase they expect.

Investigation is underway to fix this. But until that fix is implemented, that is how Cycles-X works at the moment.