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Re: [Starpu-devel] Performance issue of StarPU on Intel self-hosted KNL


Chronologique Discussions 
    < Chronologique >      < Discussions >
  • From: Olivier Aumage <olivier.aumage@inria.fr>
  • To: Samuel Thibault <samuel.thibault@inria.fr>
  • Cc: Negin Bagherpour <negin.bagherpour@manchester.ac.uk>, "starpu-devel@lists.gforge.inria.fr" <starpu-devel@lists.gforge.inria.fr>, Mawussi Zounon <mawussi.zounon@manchester.ac.uk>, Jakub Sistek <jakub.sistek@manchester.ac.uk>
  • Subject: Re: [Starpu-devel] Performance issue of StarPU on Intel self-hosted KNL
  • Date: Wed, 20 Sep 2017 22:01:26 +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>

> Le 20 sept. 2017 à 18:27, Samuel Thibault <samuel.thibault@inria.fr> a
> écrit :
>
> Mawussi Zounon, on mer. 20 sept. 2017 09:13:17 +0000, wrote:
>> Knowing that DGEMM, that does not require any priority,
>
> I don't agree with this :)
>
> DGEMMs which are close to the diagonal should be prioritized, to make
> sure that parallelism gets unlocked early enough.
>

Hi,

Mawussi's remark is about the implementation of the task-based DGEMM kernel
in itself, not about the DGEMMs tasks of the task-based POTRF kernel.
--
Olivier



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