[Mpi3-hybridpm] [Mpi3-rma] MPI_Win_Allocate_shared proposal draft

[Torsten Hoefler]

Thanks Rajeev!

All changes are in and attached to the ticket. 

https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/284

Torsten

On Mon, Aug 29, 2011 at 01:16:57PM -0500, Rajeev Thakur wrote:
> Looks good. Some comments:
> 
> 6:14 - baseptrs -> baseptr
> 
> 6:26 - DISP_UNIT -> SIZE
> 
> 6:30 - "among all processes" -> "among all processes in comm"
> 
> 6:31 - "returns" -> "and returns"
> 
> 6:32 - "be target" -> "be the target"
> 
> 6:33 - "accessed" -> "accesses"
> 
> 6:33 - change to "remote processes; the base pointers for other processes can be queried..."
> 
> 6:35 - Much of the sentence "The returned memory..." seems to be a repetition of what has been said before.
> 
> 6:39 - I would like the sentence to clearly say that it is the user's responsibility to pass a communicator whose processes can share memory. How about changing it to 
> 
> "It is the user's responsibility to ensure that the communicator comm represents a group of processes that can create a shared memory segment that can be accessed by all processes in the group."
> 
> Then we should say what happens if the communicator contains processes that cannot share memory.
> 
> 7:10 - "as info key" -> "as an info key"
> 
> 7:35 - MPI_WIN_FLAVOR_SHM is not defined in 11.2.6
> 
> 
> Since the default allocation is supposed to be contiguous, is the intended implementation method supposed to be something like the following:
>    * wait for everyone to call the function
>    * gather everyone's local size; add it up
>    * allocate single, large shared memory
>    * return local pointers everywhere
> 
> 
> On Aug 29, 2011, at 12:12 AM, Torsten Hoefler wrote:
> 
> > Hello all,
> > 
> > We just posted a new update to the proposal (thanks to Bill for the
> > comments!) to the ticket at
> > https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/ticket/284/
> > 
> > All the Best,
> >  Torsten
> > 
> > -- 
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> > Torsten Hoefler         | Performance Modeling and Simulation Lead
> > Blue Waters Directorate | University of Illinois (UIUC)
> > 1205 W Clark Street     | Urbana, IL, 61801
> > NCSA Building           | +01 (217) 244-7736
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-- 
 bash$ :(){ :|:&};: --------------------- http://www.unixer.de/ -----
Torsten Hoefler         | Performance Modeling and Simulation Lead
Blue Waters Directorate | University of Illinois (UIUC)
1205 W Clark Street     | Urbana, IL, 61801
NCSA Building           | +01 (217) 244-7736