ROCR_VISIBLE_DEVICES Is the closer analogy. GPU_DEVICE_ORDINAL is in principle more generic (though does have GPU in the name). OpenCL could in principle (can!) run on other devices which could/can have more exotic topology, but for the sake of simplicity are likely to be presented as a list of devices...
Gareth -----Original Message----- From: slurm-users <slurm-users-boun...@lists.schedmd.com> On Behalf Of Valerio Bellizzomi Sent: Thursday, 6 May 2021 6:35 PM To: slurm-users@lists.schedmd.com Subject: Re: [slurm-users] CUDA vs OpenCL On Thu, 2021-05-06 at 08:00 +0000, Williams, Gareth (IM&T, Black Mountain) wrote: > The post has me thinking so I did a little searching... AMD have an > offering that supports OpenCL and they are not NVIDIA. They use a > different approach: > https://rocmdocs.amd.com/en/latest/Programming_Guides/Opencl-programmi > ng-guide.html#masking-visible-devices Thank you for the pointer. It seems to me that they just name the variable differently (GPU_DEVICE_ORDINAL) but the approach is the same. > FWIW I did not yet see anything there about cgroups and enforced > device visibility/constraints vs playing nicely with environment > variables. Here documentation on device cgroups: https://rocmdocs.amd.com/en/latest/ROCm_System_Managment/ROCm-System-Managment.html?highlight=device%20cgroups#device-cgroup > For reference, I have no AMD affiliation and little to no direct > experience. > > It is pretty easy to also find what else supports OpenCL (Wikipedia?). > What environment to honor seems to me to mostly be a software choice > and most of the software is from vendors, albeit sometimes being open > source or using on or relying on open source components or layers. > > Gareth > > -----Original Message----- > From: slurm-users <slurm-users-boun...@lists.schedmd.com> On Behalf Of > Valerio Bellizzomi > Sent: Thursday, 6 May 2021 5:21 PM > To: slurm-users@lists.schedmd.com > Subject: Re: [slurm-users] CUDA vs OpenCL > > On Wed, 2021-04-28 at 10:56 +0200, Valerio Bellizzomi wrote: > > Greetings, > > I see here https://slurm.schedmd.com/gres.html#GPU_Management that > > CUDA_VISIBLE_DEVICES is available for NVIDIA GPUs, what about OpenCL > > GPUs? > > > > Is there an OPENCL_VISIBLE_DEVICES ? > > > > > > Lack of followup lets me conclude that there isn't an OpenCL > equivalent of CUDA_VISIBLE_DEVICES. It is unfortunate that this open > source software is committed to a single gpu supplier. >
