[Openmp-dev] offloading library

C Bergström cbergstrom at pathscale.com
Tue Jul 28 09:06:08 PDT 2015

btw - I disagree that this should live *inside* the OpenMP repo. I
think liboffload should be standalone and *outside*. This would make
it visable and useful to multiple projects. The infrastructure and
interface necessary for offloading at the end of the day have a lot of

On Tue, Jul 28, 2015 at 9:30 PM, Sergey Ostanevich <sergos.gnu at gmail.com> wrote:
> Chirs,
> Could you please comment my proposal of offload project organization at
> http://lists.cs.uiuc.edu/pipermail/openmp-dev/2015-June/000731.html
> Also having that big experience in different programming models, could you
> please review the RTL (low level) interface described in
> http://goo.gl/L1rnKJ - whether it is sufficient to implement support for all
> model you aware of?
> regards,
> Sergos
> On Tue, Jun 9, 2015 at 3:30 PM, C Bergström <cbergstrom at pathscale.com>
> wrote:
>> liboffload is not only useful for OMP alone. There's c++AMP, OpenCL
>> (potentially) and other programming models which are doing
>> "offloading". Gluing it to OMP reduces the visibility just as much the
>> reason as why you haven't heard about other offloading runtimes. (They
>> exist already)
>> Not to mention the build infrastructure reasons. Look at the whole
>> libunwind mess and how that eventually needed to get moved to an
>> independent repo.
>> I wish people (esp researchers) would look into the current state of
>> things a bit more before just proposing the thing which seems obvious,
>> but probably not the best long term plan.
>> New repo, new project - has 3 layers: top layer API is exposed and
>> meant for programming models to build on top of, middle is the
>> transition to the bottom and exposes hardware hooks and bottom layer
>> is hardware speicifc. I have this model today and it supports (PHI,
>> AMD dGPU/APU and NVIDIA) across multiple programming models -
>> including OMP4, OpenACC, C++AMP.. etc
>> _______________________________________________
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