What is exact double precision performance for Mali T628 MP6 (Arndale Octa Board) ?

Hi Piotr,

I've updated my original reply with some updated numbers, as it's actually 5 FP64 FLOPS not 8.5, the simple half was a bit too naive So slightly less than 1/3, but not as bad as 1/24. So it becomes $5.60/GFLOPS.

As for utilization, we usually suggest 70% as being pretty optimal usage for a real application, but this number will change for different applications. Beyond that point the ALU is rarely a bottleneck, and you have to look a lot closer at cache utilization and the memory system feeding the GPU, eliminating CPU/GPU sync points to improve the pipelining of work to the GPU etc.

Hope this helps,

Chris

Hi Piotr,

I've updated my original reply with some updated numbers, as it's actually 5 FP64 FLOPS not 8.5, the simple half was a bit too naive So slightly less than 1/3, but not as bad as 1/24. So it becomes $5.60/GFLOPS.

As for utilization, we usually suggest 70% as being pretty optimal usage for a real application, but this number will change for different applications. Beyond that point the ALU is rarely a bottleneck, and you have to look a lot closer at cache utilization and the memory system feeding the GPU, eliminating CPU/GPU sync points to improve the pipelining of work to the GPU etc.

Hope this helps,

Chris