Quoting Kasiviswanathan, Harish (2018-11-26 22:59:30)

Thanks Tejun,Eric and Christian for your replies.

We want GPUs resource management to work seamlessly with containers and container orchestration. With the Intel / bpf based approach this is not possible. 

From your response we gather the following. GPU resources need to be abstracted. We will send a new proposal in same vein. Our current thinking is to start with a single abstracted resource and build a framework that can be expanded to include additional resources. We plan to start with “GPU cores”. We believe all GPUs have some concept of cores or compute unit.

I think a more abstract property "% of GPU (processing power)" might
be a more universal approach. One can then implement that through
subdividing the resources or timeslicing them, depending on the GPU
topology.

Leasing 1/8th, 1/4th or 1/2 of the GPU would probably be the most
applicable to cloud provider usecases, too. At least that's what I
see done for the CPUs today.

That combined with the "GPU memory usable" property should be a good
starting point to start subdividing the GPU resources for multiple
users.

Regards, Joonas

Your feedback is highly appreciated.

Best Regards,
Harish



From: amd-gfx <redacted> on behalf of Tejun Heo <tj@kernel.org>
Sent: Tuesday, November 20, 2018 5:30 PM
To: Ho, Kenny
Cc: cgroups@vger.kernel.org; intel-gfx@lists.freedesktop.org; y2kenny@gmail.com; amd-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org
Subject: Re: [PATCH RFC 2/5] cgroup: Add mechanism to register vendor specific DRM devices
  

Hello,

On Tue, Nov 20, 2018 at 10:21:14PM +0000, Ho, Kenny wrote:

quoted

By this reply, are you suggesting that vendor specific resources
will never be acceptable to be managed under cgroup?  Let say a user

I wouldn't say never but whatever which gets included as a cgroup
controller should have clearly defined resource abstractions and the
control schemes around them including support for delegation.  AFAICS,
gpu side still seems to have a long way to go (and it's not clear
whether that's somewhere it will or needs to end up).

quoted

want to have similar functionality as what cgroup is offering but to
manage vendor specific resources, what would you suggest as a
solution?  When you say keeping vendor specific resource regulation
inside drm or specific drivers, do you mean we should replicate the
cgroup infrastructure there or do you mean either drm or specific
driver should query existing hierarchy (such as device or perhaps
cpu) for the process organization information?

To put the questions in more concrete terms, let say a user wants to
expose certain part of a gpu to a particular cgroup similar to the
way selective cpu cores are exposed to a cgroup via cpuset, how
should we go about enabling such functionality?

Do what the intel driver or bpf is doing?  It's not difficult to hook
into cgroup for identification purposes.

Thanks.

-- 
tejun
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