[Mpi3-rma] notes from 5pm Tuesday meeting @ July 2012 Forum

[Jeff Hammond]

Are we going to force implementers to support 8-byte atomics when the
load-store granularity is 4-bytes?  I guess it doesn't matter so much
but I thought it prudent to ask.  I guess this was addressed already.

Jeff

On Tue, Jul 17, 2012 at 6:26 PM, Jeff Hammond <jhammond at alcf.anl.gov> wrote:
> I don't know that floating-point compare is well-defined.  You really
> have ask "if abs(x-y)<tolerance" and not "if x==y".
>
> I think only fixed-point types should be valid for CAS.
>
> Jeff
>
> On Tue, Jul 17, 2012 at 6:14 PM, Dave Goodell <goodell at mcs.anl.gov> wrote:
>> Discussed the complex types in COMPARE_AND_SWAP issue.  "Fortran Integer" category is permitted, but "Complex" category is not, primarily because of width.  Since "Fortran Integer" contains wide types, shouldn't we just permit "Complex" and "Floating point" as well?  Consensus was to stick with the existing text which permits only "C integer, Fortran integer, Logical, Multi-language types, or Byte".
>>
>> Group review (esp. Jim & Sreeram): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/187
>>
>> incorporate Jim suggested change (Torsten): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/271
>>
>> we think we are unaffected, but need a second check (Jim): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/278
>>
>> Double-check that C++ is not referenced in the RMA chapter (Pavan): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/281
>>
>> Needs review (Dave): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/300
>>
>> Think unaffected, but slim chance of Rput/Rget being affected (Pavan): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/317
>>
>> Need to check implementation of various (4?) "flush is non-local" changes (Dave): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/270
>>
>> Need to check disp_unit change (Jim & Sreeram): https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/284
>>
>> After the above items have all been dealt with, all chapter committee members should re-read the whole chapter in the *clean* document (the one _without_ the changebars and colored text) to look for obvious typos and inconsistencies.
>>
>> -Dave
>>
>>
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>
>
>
> --
> Jeff Hammond
> Argonne Leadership Computing Facility
> University of Chicago Computation Institute
> jhammond at alcf.anl.gov / (630) 252-5381
> http://www.linkedin.com/in/jeffhammond
> https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond



-- 
Jeff Hammond
Argonne Leadership Computing Facility
University of Chicago Computation Institute
jhammond at alcf.anl.gov / (630) 252-5381
http://www.linkedin.com/in/jeffhammond
https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond