[Beignet] [PATCH] Doc: add OpenCL 2.0 section to readme.

[Yang, Rong R]

Thanks, refine and pushed.

> -----Original Message-----
> From: Song, Ruiling
> Sent: Friday, January 20, 2017 16:33
> To: Yang, Rong R <rong.r.yang at intel.com>; beignet at lists.freedesktop.org
> Cc: Yang, Rong R <rong.r.yang at intel.com>
> Subject: RE: [Beignet] [PATCH] Doc: add OpenCL 2.0 section to readme.
> 
> 
> Basically looks good, But some typos.
> 
> > -----Original Message-----
> > From: Beignet [mailto:beignet-bounces at lists.freedesktop.org] On Behalf
> > Of Yang Rong
> > Sent: Friday, January 20, 2017 5:34 PM
> > To: beignet at lists.freedesktop.org
> > Cc: Yang, Rong R <rong.r.yang at intel.com>
> > Subject: [Beignet] [PATCH] Doc: add OpenCL 2.0 section to readme.
> >
> > Signed-off-by: Yang Rong <rong.r.yang at intel.com>
> > ---
> >  docs/Beignet.mdwn | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> >
> > diff --git a/docs/Beignet.mdwn b/docs/Beignet.mdwn index
> > 64d33dc..b0fea71 100644
> > --- a/docs/Beignet.mdwn
> > +++ b/docs/Beignet.mdwn
> > @@ -158,6 +158,18 @@ Supported Targets
> >   * 6th Generation Intel Core Processors "Skylake" and "Kabylake".
> >   * 5th Generation Intel Atom Processors "Broxten" or "Apollolake".
> >
> > +OpenCL 2.0
> > +----------
> > +From release v1.3.0, beignet support OpenCL 2.0. By default, OpenCL
> > +2.0
> > support is disabled, you can enable it when cmake with option
> > +-DENABLE_OPENCL_20=1. Please remember that to enable OpenCL 2.0,
> > +there
> > are some dependencies. First, OpenCL 2.0 only support the targets
> > +from Skylake, include Skylake, Kabylake and Apollolake. Then, only
> > +clang
>                                                                                                 "clang only" is more proper
> here? I am not sure:)
> > support all OpenCL 2.0 feature from 3.9. So to enable OpenCL 2.0,
> > +you must update LLVM/clang to 3.9 or later. And also requeired libdrm
> > +at least
>                                                                                                        "requires"
> > 2.4.66.
> > +After enable OpenCL 2.0, beignet complies with OpenCL 2.0 spec, but
> > +some
> > OpenCL 2.0 features is simulated by software, there is no performance
>                                          "are"
> > +gain, such as pipe and device queues, especially device queues.
> > +If you build beignet with enable OpenCL 2.0 and your kernel don't use
> > +the
> 		           "with OpenCL 2.0 enabled"
> > OpenCL 2.0 features, please pass a build option -cl-std=CL1.2 for
> > +performance, the OpenCL 2.0 uses more registers and has lots of long
>                                                   "has lots of int64 operations" may be more clear
> > operations, which may hurt performance, and beignet will continue to
> > improve
> > +OpenCL 2.0 performance.
> > +
> >  Known Issues
> >  ------------
> >
> > --
> > 2.1.4
> >
> > _______________________________________________
> > Beignet mailing list
> > Beignet at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/beignet