Re: GPU offloading question

[Steve Kargl <sgk@troutmask.apl.washington.edu>]

On Sat, Feb 03, 2024 at 02:37:05PM +0100, Richard Biener wrote:
> 
> > Am 03.02.2024 um 01:22 schrieb Steve Kargl <sgk@troutmask.apl.washington.edu>:
> > 
> > All,
> > 
> > Suppose one is working in a funding-constrained environment
> > such as an academician with limited grant funding.  If one
> > wanted to dabble in GPU offloading with gcc/gfortran, what
> > recommendations would one have for minimum required hardware?
> > In addition, are there any vendor software layers that are
> > required (such as AMD ROCm with an AMD GPU)?
> 
> You need the HSA runtime for AMD which comes with ROCm and libcuda
> for NvIDIA which comes with CUDA.

Thanks.  I'll need to check the level of support for the above
in FreeBSD.  I suspect it's non-existent, so looks like I'll take
a plunge down the linux rabbit hole.

> I’ve had success getting both a very low end gtx1650 and a high
> end rx6900xt running with simple offloading.  The officially supported
> set of hardware is way bigger with CUDA when it comes to lower end cards.
> 
> I can’t say anything about performance with regard to how GCC handles both.
> 
> Note that double precision math performance is said to be severely
> constrained for consumer hardware.

Ah, good point.  I'll need to find a card I can afford that supports
double precision.


-- 
steve

> 
> Richard 
> 
> > 
> > --
> > Steve

-- 
Steve