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Re: [Starpu-devel] Combined workers and OpenMP code


Chronologique Discussions 
  • From: Samuel Thibault <samuel.thibault@ens-lyon.org>
  • To: Keisuke Fukuda <fukuda@matsulab.is.titech.ac.jp>
  • Cc: starpu-devel@lists.gforge.inria.fr
  • Subject: Re: [Starpu-devel] Combined workers and OpenMP code
  • Date: Thu, 26 Apr 2012 13:11:37 +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>

Keisuke Fukuda, le Thu 26 Apr 2012 20:09:21 +0900, a écrit :
> But mine and vector_scal still use only upto 4 cores. I investigated a
> little and found that
> StarPU only recognized 4 cores.
>
> Here's a result from starpu_machine_display :
> $ starpu_machine_display
> StarPU has found :
> 4 CPU cores
> CPU 0
> CPU 1
> CPU 2
> CPU 3
> 2 CUDA devices
> CUDA 0 (Tesla C2050 2.6 GiB 01:00.0)
> CUDA 1 (Tesla C2050 2.6 GiB 02:00.0)
> 0 OpenCL devices
> (snip)
>
> I checked "lstopo" command and made sure that hwloc recognizes 6 cores.
> Why StarPU doesn't recognize the other 2 cores?

It actually does. But it takes two of them for driving GPUs.

Samuel





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