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- From: Mirko Myllykoski <mirkom@cs.umu.se>
- To: Mirko Myllykoski <mirkom@cs.umu.se>
- Cc: Starpu Devel <starpu-devel@lists.gforge.inria.fr>
- Subject: Re: [Starpu-devel] CPU core binding mask and worker creation.
- Date: Wed, 24 Oct 2018 11:04:35 +0200
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Hi
On 2018-10-24 10:55, Samuel Thibault wrote:
Mirko Myllykoski, le mer. 24 oct. 2018 10:50:09 +0200, a ecrit:
The current approach can lead to odd behavior if the binding mask is set to
something else that all available PUs. It seems that multiple workers end up
running on a same PU and StarPU does not even warn about that. I think that
the library should at least warn that this is happening.
? I believe there are such warnings in place already.
It seems that I get a warning when set STARPU_NCPU or STARPU_WORKERS_CPUID incorrectly.
However, hwloc-bind 0x00000001 ./my_application ... does not print any warnings. I get four workers (quad core CPU) and all workers seems to be bind to a single core (core #0 in this case). The execution time is also about four time longer than with hwloc-bind 0x0000000f ./my_application ....
- Mirko
- [Starpu-devel] CPU core binding mask and worker creation., Mirko Myllykoski, 24/10/2018
- Re: [Starpu-devel] CPU core binding mask and worker creation., Samuel Thibault, 24/10/2018
- Re: [Starpu-devel] CPU core binding mask and worker creation., Mirko Myllykoski, 24/10/2018
- Re: [Starpu-devel] CPU core binding mask and worker creation., Samuel Thibault, 24/10/2018
- Re: [Starpu-devel] CPU core binding mask and worker creation., Mirko Myllykoski, 24/10/2018
- Re: [Starpu-devel] CPU core binding mask and worker creation., Samuel Thibault, 24/10/2018
- Re: [Starpu-devel] CPU core binding mask and worker creation., Mirko Myllykoski, 24/10/2018
- Re: [Starpu-devel] CPU core binding mask and worker creation., Samuel Thibault, 24/10/2018
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