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Re: [Starpu-devel] Performance profiling of tile low rank cholesky (HiCMA) with StarPU on distributed memory systems
Chronologique Discussions
- From: Hatem Ltaief <hatem.ltaief@kaust.edu.sa>
- To: Samuel Thibault <samuel.thibault@inria.fr>
- Cc: Kadir Akbudak <kadir.akbudak@kaust.edu.sa>, Aniello Esposito <esposito@cray.com>, "starpu-devel@lists.gforge.inria.fr" <starpu-devel@lists.gforge.inria.fr>, Aleksandr Mikhalev <aleksandr.mikhalev@kaust.edu.sa>, "Sameh M. Abdulah" <sameh.abdulah@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 18:44:22 +0000
- Accept-language: en-GB, en-US
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Kadir should update soon on switching to ws or lws, in situations where cores
don’t have enough work (i.e., in strong scaling mode of operations).
Thx,
H
> On May 2, 2018, at 8:30 PM, Samuel Thibault <samuel.thibault@inria.fr>
> wrote:
>
> 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
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- 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
- Re: [Starpu-devel] Performance profiling of tile low rank cholesky (HiCMA) with StarPU on distributed memory systems, Hatem Ltaief, 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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