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supported architectures of ROCm

Hi Cordell,

I have a quick question about rocm.
Does it aim to support amd64 only?

>From the usage of x86intrin.h, we can see that the support for
non-x86 architectures is not yet considered in the code.

If not, then there maybe something to fix.

On Sun, 2022-02-13 at 13:30 -0700, Cordell Bloor wrote:
> Hey there folks,
> I'm not sure if this would work for Debian, but I thought it was
> worth 
> mentioning that Amazon EC2 now has g4ad instances with AMD Radeon Pro
> V520 GPUs [1]. These are Navi 12 GPUs (gfx1011) and are not
> officially 
> supported by ROCm, but there has been unofficial support in the lower
> parts of the stack for a while [2] and support in the math libraries
> is 
> a work-in-progress [3].
> I'm not very familiar with EC2 yet, but I think you'd need to build
> your 
> own Amazon Machine Images (AMIs) to test with the Debian Sid kernel. 
> Still, all the userland packaging components could be tested on a 
> run-of-the-mill g4ad instance in a docker container. When choosing an
> instance size, the main concern is the amount or RAM available. A 
> g4ad.4xlarge (64GiB of RAM) is sufficient to run all tests, but I 
> suspect most components can probably be tested with just a
> g4ad.xlarge 
> (16 GiB of RAM).
> It's perhaps worth noting that you can't just spin up one of these 
> instances. The default vCPU limit for "Running On-Demand G and VT 
> instances" is 0, I had to request a limit increase. It may just be 
> because my account was brand new, but my request was initially denied
> and I had to escalate the issue by contacting their sales team.If
> you're 
> running batch jobs for these tests, you may prefer Spot Instances,
> which 
> appears to be a separate limit.
> Sincerely,
> Cory Bloor
> [1]: https://aws.amazon.com/ec2/instance-types/g4/
> [2]: https://threedots.ovh/blog/2021/11/what-is-amd-rocm/
> [3]: https://github.com/ROCmSoftwarePlatform/rocSOLVER/pull/374

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