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starpu-devel - Re: [Starpu-devel] A question regarding the STARPU_REDUX flag

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Re: [Starpu-devel] A question regarding the STARPU_REDUX flag


Chronologique Discussions 
  • From: Samuel Thibault <samuel.thibault@inria.fr>
  • To: Mirko Myllykoski <mirkom@cs.umu.se>
  • Cc: starpu-devel@lists.gforge.inria.fr
  • Subject: Re: [Starpu-devel] A question regarding the STARPU_REDUX flag
  • Date: Wed, 8 Apr 2020 11:30:02 +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 mer. 08 avril 2020 11:06:31 +0200, a ecrit:
> a) "StarPU provides a mode STARPU_REDUX, which permits to optimize this
> case: it will allocate a buffer on each memory node,

That's a typo, the REDUX and SCRATCH buffers are per-worker (as seen in
src/datawizard/coherency.c's get_replicate). Now fixed.

> Which one of these these statements is correct? I am getting results that
> seem to indicate that the statement (a) is correct.

How so?

Samuel




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