starpu-devel - Re: [Starpu-devel] About concurrent parallel tasks and OpenMP

Objet : Developers list for StarPU

Archives de la liste

Re: [Starpu-devel] About concurrent parallel tasks and OpenMP

From: Samuel Thibault <samuel.thibault@inria.fr>
To: Mirko Myllykoski <mirkom@cs.umu.se>
Cc: Starpu Devel <starpu-devel@lists.gforge.inria.fr>
Subject: Re: [Starpu-devel] About concurrent parallel tasks and OpenMP
Date: Tue, 28 Aug 2018 11:37:33 +0200
List-archive: <http://lists.gforge.inria.fr/pipermail/starpu-devel/>
List-id: "Developers list. For discussion of new features, code changes, etc." <starpu-devel.lists.gforge.inria.fr>
Organization: I am not organized

Mirko Myllykoski, le mar. 28 août 2018 10:27:44 +0100, a ecrit:
> My interpretation is that a situation where two pthreads (StarPU worker
> threads) encounter parallel pragmas concurrently, then something goes wrong
> (thread safety? thread binding?).

Depending on the OpenMP implementation things can go wrong yes. I don't
know exactly which have the issue.

> My understanding that the “clustering” is a some type of solution
> to this problem. Is this correct?

Not really: as you have seen, clustering still does not use pragmas to
create threads, so the issues of OpenMP implementations remain.

Samuel

[Starpu-devel] About concurrent parallel tasks and OpenMP, Mirko Myllykoski, 28/08/2018
- Re: [Starpu-devel] About concurrent parallel tasks and OpenMP, Samuel Thibault, 28/08/2018
  - [Starpu-devel] question on CPU/GPU tasks distribution, philippe.helluy@unistra.fr, 31/08/2018
    - Re: [Starpu-devel] question on CPU/GPU tasks distribution, Samuel Thibault, 31/08/2018
      - Re: [Starpu-devel] question on CPU/GPU tasks distribution, philippe.helluy@unistra.fr, 31/08/2018
        
        Re: [Starpu-devel] question on CPU/GPU tasks distribution, Samuel Thibault, 31/08/2018

Archives gérées par MHonArc 2.6.19+.

Archives de la liste

Re: [Starpu-devel] About concurrent parallel tasks and OpenMP