[mpich-discuss] Faster MPI_Attr_get?

Jed Brown jedbrown at mcs.anl.gov
Fri May 11 13:38:30 CDT 2012


Yes, well, presumably the implementation is the same. We use the old name
in PETSc because we are somehow obliged to work on systems that don't have
an MPI-2 implementation.
On May 11, 2012 1:32 PM, "Jeff Hammond" <jhammond at alcf.anl.gov> wrote:

> MPI_Attr_get "is deprecated and is supersded by MPI_COMM_GET_ATTRin
> MPI-2.0," according to the MPI 2.2 standard page 463.  Hence, Jed's
> question should be requeued with s/MPI_Attr_get/MPI_Comm_get_attr/g".
>
> Jeff
>
> On Fri, May 11, 2012 at 1:24 PM, Jeff Squyres <jsquyres at cisco.com> wrote:
> > Just curious -- what's your use case for this?
> >
> > I think the prevailing assumption in the forum was that attributes
> weren't used much, and attribute set/get performance definitely didn't
> matter.
> >
> >
> > On May 11, 2012, at 2:17 PM, Jed Brown wrote:
> >
> >> Can you make this fast, like ~100 clocks for the common case?
> >>
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> > --
> > Jeff Squyres
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>
> --
> Jeff Hammond
> Argonne Leadership Computing Facility
> University of Chicago Computation Institute
> jhammond at alcf.anl.gov / (630) 252-5381
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