[petsc-dev] OpenCL 2.0 provisional

[Karl Rupp]

Hi guys,

A couple of days back the Khronos group released their OpenCL 2.0 preview:
http://www.khronos.org/registry/cl/

They pretty much extend their memory model, including shared virtual 
memory for APU-like processors sharing CPU and accelerator hardware on 
the same chip and also (try to) standardize an LLVM-like IR. As I was 
discussing with Matt that the OpenCL compilation on the CPU is 
completely messed up as-is, and considering that Jed played a bit with 
LLVM recently, it may be worth targeting such an IR for our basic kernels.

Of course this does not solve the memory problems of NUMA and dealing 
properly with the increasing number of memory channels...

Best regards,
Karli