[Mpi3-hybridpm] Reminder for telecon tomorrow

[Dieter an Mey]

I am wondering how the ideas scetched in the attachment which was just distributed map to any OpenMP coding style.
Spawning helper threads for a "random period of time"? How would this work in OpenMP?
OpenMP is not specified to work well with additional native threads (yet), allthough some current implementations do to some degree.

Dieter

----- Original Message -----
From: Douglas Miller <dougmill at us.ibm.com>
Date: Tuesday, February 16, 2010 2:51 pm
Subject: Re: [Mpi3-hybridpm] Reminder for telecon tomorrow
To: mpi3-hybridpm at lists.mpi-forum.org


> I am definitely thinking about OpenMP and how best to use it, but of course
>  we can't depend on it being used in all cases so we have to have solutions
>  that work with pthreads or other mechanisms for parallelism.
>  
>  
>  _______________________________________________
>  Douglas Miller                  BlueGene Messaging Development
>  IBM Corp., Rochester, MN USA                     Bldg 030-2 A410
>  dougmill at us.ibm.com               Douglas Miller/Rochester/IBM
>  
>  
>                                                                        
>      
>               "an Mey, Dieter"                                         
>      
>               <anmey at rz.rwth-aa                                        
>      
>               chen.de>                                                 
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> "mpi3-hybridpm at lists.mpi-forum.org" 
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> Subject 
>                                         Re: [Mpi3-hybridpm] Reminder 
> for    
>               02/16/2010 05:08          telecon tomorrow               
>      
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>  
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>  
>  
>  Dear all,
>  
>  I subscribed to this list only recently in order to get an impression 
> on
>  how MPI is evolving concerning hybrid parallelization.
>  I am participating in the OpenMP Language Committee and I am 
> wondering in
>  how far OpenMP is of any concern.
>  
>  Best regards,
>  Dieter
>  
>  --
>  Dipl.-Math. Dieter an Mey, HPC Team Lead
>  RWTH Aachen University, Center for Computing and Communication
>  Rechen- und Kommunikationszentrum der RWTH Aachen
>  Seffenter Weg 23, D 52074 Aachen (Germany)
>  Phone: + 49 241 80 24377 - Fax/UMS: + 49 241 80 624377
>  http://www.rz.rwth-aachen.de
>  
>  
>  > -----Original Message-----
>  > From: mpi3-hybridpm-bounces at lists.mpi-forum.org [mailto:mpi3-hybridpm-
>  > bounces at lists.mpi-forum.org] On Behalf Of Pavan Balaji
>  > Sent: Tuesday, February 16, 2010 1:25 AM
>  > To: mpi3-hybridpm at lists.mpi-forum.org
>  > Subject: Re: [Mpi3-hybridpm] Reminder for telecon tomorrow
>  >
>  >
>  > On 02/15/2010 02:51 PM, Douglas Miller wrote:
>  > > Here is the document for starting a discussion on additional
>  > parallelism
>  > > models.
>  >
>  > Thanks Doug. I think the biggest issue here is the lack of a concrete
>  > API and semantics. This (at least for me) was the cause of the most
>  > confusion. That is, can a user provide a helper thread to the MPI
>  > implementation for a random period of time? How does the thread detach
>  > (does some other thread detach or does the MPI implementation "let 
> go"
>  > of the thread when it's done)?
>  >
>  > If you can add some notes about these, that'll be great. Either ways,
>  > we
>  > can discuss these issues during tomorrow's call.
>  >
>  >  -- Pavan
>  >
>  > --
>  > Pavan Balaji
>  > http://www.mcs.anl.gov/~balaji
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