[Beowulf] Frontier Announcement

[Jeffrey Layton]

I was just pointing out that gcc has Open ACC capability on AMD GPUs.

I didn't realize you part of the OpenMP Nazis. Were you the one that
threatened me and my family because I wrote about OpenACC?



On Wed, May 8, 2019, 15:48 Richard Walsh <rbwcnslt at gmail.com> wrote:

>
> Jeffry/All,
>
> Yes ... but given the choice of using OpenACC or OpenMP (if you are not
> going to write CUDA-HIP code for that extra 10% of performance) which
> captures most (all?) of the features of OpenACC, is a standard likely to
> outlive OpenACC, and should run on any vendor’s  accelerators, including
> whatever Intel comes up with ... why would you write in OpenACC ... ??
>
> GNU supports OpenMP too ... in my view, PVM is to MPI as OpenACC is to
> OpenMP 4.5-5.0 ...
>
> Cheers!
>
> rbw
>
> Sent from my iPhone
>
> On May 8, 2019, at 2:36 PM, Jeffrey Layton <laytonjb at gmail.com> wrote:
>
> Don't forget that gcc supports both NV and AMD GPUs with OpenACC. That's
> one of the lead compilers listed on the Frontier specs.
>
> Jeff
>
>
> On Wed, May 8, 2019 at 3:29 PM Richard Walsh <rbwcnslt at gmail.com> wrote:
>
>>
>> All,
>>
>> Cray has deprecated support for in OpenACC in light of the OpenMP 4.5 and
>> 5.0 standards, and their target and data directives. NVIDIA’s PGI Compiler
>> group will keep OpenACC going for a while, but on AMD devices ... maybe
>> not.  That Cray will support only OpenMP on Frontier seems to be a logical
>> certainty.
>>
>> So if you or yours want to run at speed on Frontier you should bone up on
>> ROCm, HIP and OpenMP 4.5-5.0 ...
>>
>> :-)
>>
>> Cheers!
>>
>> rbw
>>
>> Sent from my iPhone
>>
>> > On May 8, 2019, at 12:47 PM, Jörg Saßmannshausen <
>> sassy-work at sassy.formativ.net> wrote:
>> >
>> > Dear all,
>> >
>> > I think the answer to the question lies here:
>> >
>> > https://en.wikipedia.org/wiki/OpenACC
>> >
>> > As I follow these things rather loosely, my understanding was that
>> OpenACC
>> > should run on both nVidia and other GPUs. So maybe that is the reason
>> why it
>> > is a 'pure' AMD cluster where both GPUs and CPUs are from the same
>> supplier?
>> > IF all of that is working out and if it is really true that you can
>> compile
>> > and run OpenACC code on both types of GPUs, it would a be big win for
>> AMD.
>> >
>> > Time will tell!
>> >
>> > All the best from my TARDIS!
>> >
>> > Jörg
>> >
>> > Am Dienstag, 7. Mai 2019, 16:59:48 BST schrieben Sie:
>> >>>  I think it is interesting that they are using AMD for
>> >>>
>> >>> both the CPUs and GPUs
>> >>
>> >> I agree. That means a LOT of codes will have to be ported from CUDA to
>> >> whatever AMD uses. I know AMD announced their HIP interface to convert
>> >> CUDA code into something that will run on AMD processors, but I don't
>> >> know how well that works in theory. Frankly, I haven't heard anything
>> >> about it since it was announced at SC a few years ago.
>> >>
>> >> I would not be surprised if AMD pursued this bid quite agressively,
>> >> possibly at a significant loss, for the opportunity to prove their GPUs
>> >> can compete with NVIDIA and demonstrate that codes can be successfully
>> >> converted from CUDA to something AMD GPUs can use to demonstrate GPU
>> >> users don't need to be locked in to a single vendor. If so, this could
>> >> be a costly gamble for the DOE and AMD, but if it pays off, I imagine
>> it
>> >> could change AMD's fortunes in HPC.
>> >>
>> >>  "Win on Sunday, sell on Monday" doesn't apply just to cars.
>> >>
>> >> Prentice
>> >>
>> >>> On 5/7/19 4:43 PM, Jörg Saßmannshausen wrote:
>> >>> Hi Prentice,
>> >>>
>> >>> that looks interesting and I hope it means I will finally get the
>> neutron
>> >>> structure which was measured last year there! :-)
>> >>>
>> >>> On a more serious note: I think it is interesting that they are using
>> AMD
>> >>> for both the CPUs and GPUs. It sounds at least very fast of what they
>> >>> want to build, lets hope their design will work as planned as well.
>> >>>
>> >>> All the best from London
>> >>>
>> >>> Jörg
>> >>>
>> >>> Am Dienstag, 7. Mai 2019, 10:32:42 BST schrieb Prentice Bisbal via
>> > Beowulf:
>> >>>> ORNL's Frontier System has been announced:
>> >>>>
>> >>>>
>> https://www.hpcwire.com/2019/05/07/cray-amd-exascale-frontier-at-oak-ridg
>> >>>> e/
>> >
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