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Subject: Re: [OMPI devel] "Open MPI"-based MPI library used by K computer
From: Ralph Castain (rhc_at_[hidden])
Date: 2011-06-27 22:10:51


Thank you for the info! Congratulations on a tremendous achievement

I look forward to hearing more about the system and its performance as disclosure permits. Anything you can share is most welcome as we always welcome the opportunity to learn how to improve OMPI.

Meantime, good wishes on your continued efforts towards the 10Pflop!

Best regards
Ralph

On Jun 27, 2011, at 7:58 PM, Takahiro Kawashima wrote:

> Dear Open MPI community,
>
> I'm a member of MPI library development team in Fujitsu. Shinji
> Sumimoto, whose name appears in Jeff's blog, is one of our bosses.
>
> As Rayson and Jeff noted, K computer, world's most powerful HPC system
> developed by RIKEN and Fujitsu, utilizes Open MPI as a base of its MPI
> library. We, Fujitsu, are pleased to announce that, and also have special
> thanks to Open MPI community.
> We are sorry to be late announce!
>
> Our MPI library is based on Open MPI 1.4 series, and has a new point-
> to-point component (BTL) and new topology-aware collective communication
> algorithms (COLL). Also, it is adapted to our runtime environment (ESS,
> PLM, GRPCOMM etc).
>
> K computer connects 68,544 nodes by our custom interconnect.
> Its runtime environment is our proprietary one. So we don't use orted.
> We cannot tell start-up time yet because of disclosure restriction, sorry.
>
> We are surprised by the extensibility of Open MPI, and have proved that
> Open MPI is scalable to 68,000 processes level! We feel pleasure to
> utilize such a great open-source software.
>
> We cannot tell detail of our technology yet because of our contract
> with RIKEN AICS, however, we will plan to feedback of our improvements
> and bug fixes. We can contribute some bug fixes soon, however, for
> contribution of our improvements will be next year with Open MPI
> agreement.
>
> Best regards,
>
> MPI development team,
> Fujitsu
>
>
>> I got more information:
>>
>> http://blogs.cisco.com/performance/open-mpi-powers-8-petaflops/
>>
>> Short version: yes, Open MPI is used on K and was used to power the 8PF runs.
>>
>> w00t!
>>
>>
>>
>> On Jun 24, 2011, at 7:16 PM, Jeff Squyres wrote:
>>
>>> w00t!
>>>
>>> OMPI powers 8 petaflops!
>>> (at least I'm guessing that -- does anyone know if that's true?)
>>>
>>>
>>> On Jun 24, 2011, at 7:03 PM, Rayson Ho wrote:
>>>
>>>> Interesting... page 11:
>>>>
>>>> http://www.fujitsu.com/downloads/TC/sc10/programming-on-k-computer.pdf
>>>>
>>>> Open MPI based:
>>>>
>>>> * Open Standard, Open Source, Multi-Platform including PC Cluster.
>>>> * Adding extension to Open MPI for "Tofu" interconnect
>>>>
>>>> Rayson
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