[mpich-discuss] MPI I/O spilt collective implementation: MPI_File_write_all_begin blocking or non-blocking?
Rob Latham
robl at mcs.anl.gov
Mon Feb 8 20:51:06 CST 2016
On 02/08/2016 06:04 PM, pramod kumbhar wrote:
> thanks! MPI_File_iwrite_all working as expected.
I'm always glad to see folks looking at the MPI-IO routines. Let us
know how your research progresses.
==rob
>
> -Pramod
>
> On Tue, Feb 9, 2016 at 12:52 AM, Balaji, Pavan <balaji at anl.gov
> <mailto:balaji at anl.gov>> wrote:
>
>
> I believe it is valid to do that in split collectives. If you want
> truly nonblocking nature, the standard way to do it would be to use
> nonblocking collective I/O, i.e., MPI_File_iwrite_all. This is
> guaranteed to not block during the MPI_File_iwrite_all call.
>
> -- Pavan
>
> > On Feb 8, 2016, at 5:48 PM, pramod kumbhar
> <pramod.s.kumbhar at gmail.com <mailto:pramod.s.kumbhar at gmail.com>> wrote:
> >
> > Hello All,
> >
> > I am testing MPI_FIle_write_all_begin/_end and it seems like
> > MPI_File_write_all_begin waits for i/o completion.
> >
> > Could someone confirm the implementation of these routines?
> >
> > Thanks,
> > Pramod
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