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starpu-devel - Re: [Starpu-devel] Performance issues when specifying const and __attribute__ ((output))

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Re: [Starpu-devel] Performance issues when specifying const and __attribute__ ((output))


Chronologique Discussions 
  • From: Samuel Thibault <samuel.thibault@ens-lyon.org>
  • To: Mehdi AMINI <mehdi.amini@silkan.com>
  • Cc: starpu-devel@lists.gforge.inria.fr
  • Subject: Re: [Starpu-devel] Performance issues when specifying const and __attribute__ ((output))
  • Date: Mon, 2 Jul 2012 08:52:23 -0300
  • 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>

Mehdi AMINI, le Mon 02 Jul 2012 12:10:19 +0200, a écrit :
> $ STARPU_NCUDA=1 STARPU_NCPUS=0 ./bicg_starpu_naive
> 192.2
> $ STARPU_NCUDA=1 STARPU_NCPUS=0 ./bicg_starpu
> 746.5

Ouch!

Could you dump traces so we have an idea of what is happening?

Samuel





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