[Beowulf] Frontier Announcement

Prentice Bisbal pbisbal at pppl.gov
Thu May 9 13:51:04 PDT 2019


> An now back to your regularly scheduled discussion where Carol Merrill 
> is standing.

For the millenials (like Ryan) that won't get that reference. Hell, I 
didn't get that reference, either, and I'm Gen X. That means Jeff is 
(does the math) really old.

https://en.wikipedia.org/wiki/Carol_Merrill


Prentice

On 5/9/19 8:49 AM, Jeffrey Layton wrote:
> Very serious. Someone does need help - and culture needs changing 
> (i.e. OpenMP). But apologies for posting this here. I've been watching 
> for OpenMP-Nazis and it looks like I found one.
>
> Again - apologies for posting about this to the list.
>
> An now back to your regularly scheduled discussion where Carol Merrill 
> is standing.
>
> Jeff
>
>
> On Thu, May 9, 2019 at 2:16 AM John Hearns via Beowulf 
> <beowulf at beowulf.org <mailto:beowulf at beowulf.org>> wrote:
>
>     Seriously? Wha.. what? Someone needs to get help.
>     And it wasn't me. I am a member of the People's Front of Julia.
>
>     (contrived Python reference intentional)
>
>     On Wed, 8 May 2019 at 22:57, Jeffrey Layton <laytonjb at gmail.com
>     <mailto:laytonjb at gmail.com>> wrote:
>
>         I wrote some OpenACC articles for HPC Admin Magazine. A number
>         of pro-OpenMP people attacked me on twitter (you know, OpenACC
>         sucks, OpenMP is great). I received a private email
>         threatening to kill me and my family if I didn't stop writing
>         about OpenACC. Given your pro-OpenMP, anti-OpenACC stance,
>         using the same tone as the threatening email, I wondered if
>         that email came from you.
>
>
>
>         On Wed, May 8, 2019, 17:48 Richard Walsh <rbwcnslt at gmail.com
>         <mailto:rbwcnslt at gmail.com>> wrote:
>
>
>             Huh ... ??  Weird, scary ...
>
>             Just MHO. Dropping off this thread now ...
>
>             rbw
>
>             Sent from my iPhone
>
>             On May 8, 2019, at 4:29 PM, Jeffrey Layton
>             <laytonjb at gmail.com <mailto:laytonjb at gmail.com>> wrote:
>
>>             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 <mailto: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 <mailto: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 <mailto: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
>>>                     <mailto: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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