[Beignet] Intel haswell core i7-4770K Max compute unit question

Zhigang Gong zhigang.gong at linux.intel.com
Fri May 8 01:28:52 PDT 2015


EU means execution unit in GPU. You can find some further information at:
http://en.wikipedia.org/wiki/Intel_HD_and_Iris_Graphics

And you can find the corresponding information for your machine:

"HD Graphics 4200, 4400, 4600, P4600, P4700 – GT2, 20 execution units, up to 432 GFLOPS at 1350 MHz"

On Fri, May 08, 2015 at 12:27:30PM +0300, Nikita Orlov wrote:
> Hi!
> 
> What is 1 EU?
> 
> 08.05.2015, 12:24, "Zhigang Gong" <zhigang.gong at linux.intel.com>:
> > The previous (0.8.0) count of compute units is incorrect. This issue has been fixed
> > since 0.9.0. Actually, now the unit of compute unit is 1 EU.
> >
> > Thanks,
> > Zhigang Gong.
> >
> > On Wed, May 06, 2015 at 06:52:58PM +0300, Nikita Orlov wrote:
> >>  Hello!
> >>
> >>  I have strange situation.
> >>  Before, when I was using clinfo, it shows me
> >>>>>      Platform Name: Experiment Intel Gen OCL Driver Number of devices: 1
> >>>>>      Device Type: CL_DEVICE_TYPE_GPU
> >>>>>      Device ID: 1042
> >>>>>      Max compute units: 64
> >>>>>      Max work items dimensions: 3
> >>>>>        Max work items[0]: 512
> >>  (you can see here http://lists.freedesktop.org/archives/beignet/2014-June/003317.html)
> >>
> >>  now, with beignet 1.0.0 it shows me
> >>  Intel Gen OCL Driver and 20 max compute units.
> >>
> >>  Why so? Was 64, now only 20.
> >>
> >>  --
> >>  Nikita Orlov
> >>  Skype: nik_stet
> >>  QQ: 2717846083
> >>  _______________________________________________
> >>  Beignet mailing list
> >>  Beignet at lists.freedesktop.org
> >>  http://lists.freedesktop.org/mailman/listinfo/beignet
> 
> -- 
> Nikita Orlov
> Skype: nik_stet
> QQ: 2717846083


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