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Re: [Starpu-devel] Performance profiling of tile low rank cholesky (HiCMA) with StarPU on distributed memory systems
Chronologique Discussions
- From: Samuel Thibault <samuel.thibault@inria.fr>
- To: Aniello Esposito <esposito@cray.com>
- Cc: Kadir Akbudak <kadir.akbudak@kaust.edu.sa>, "starpu-devel@lists.gforge.inria.fr" <starpu-devel@lists.gforge.inria.fr>, Hatem Ltaief <hatem.ltaief@kaust.edu.sa>, "Sameh M. Abdulah" <sameh.abdulah@kaust.edu.sa>, Aleksandr Mikhalev <aleksandr.mikhalev@kaust.edu.sa>
- Subject: Re: [Starpu-devel] Performance profiling of tile low rank cholesky (HiCMA) with StarPU on distributed memory systems
- Date: Wed, 2 May 2018 19:30:13 +0200
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Aniello Esposito, le mer. 02 mai 2018 17:08:48 +0000, a ecrit:
> As Hatem already emphasized, the main point here is the behavior of threads
> in the presence of not enough work. We would have expected no real
> difference if even
> too many threads are used.
Sure, but that's precisely where a centralized scheduler like prio would
suffer from all the idle threads trying to pick up work from the central
place, tasks getting executed randomly on various CPUs, etc.
Samuel
- Re: [Starpu-devel] Performance profiling of tile low rank cholesky (HiCMA) with StarPU on distributed memory systems, Aniello Esposito, 02/05/2018
- Re: [Starpu-devel] Performance profiling of tile low rank cholesky (HiCMA) with StarPU on distributed memory systems, Samuel Thibault, 02/05/2018
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