[mpich-discuss] MPICH2's predefined reduce operation can not support quadruple precision

[Pavan Balaji]

The ticket you point out in your test program 
(https://trac.mcs.anl.gov/projects/mpich2/ticket/1028) has been fixed in 
r6426 as mentioned on the ticket. Did you try the nightly snapshots 
(http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/nightly/trunk)? 
If not, can you try them out and see if you are still seeing this problem?

Thanks,

  -- Pavan

On 05/11/2010 08:24 PM, Jilong Yin wrote:
> 
>     Hello,
> 
> 
>       MPICH2's  predefined reduce operation  seems it can not support
>     quadruple precision.
> 
> 
>       I used the attached  program to test this. And got the following
>     error message,
> 
> Fatal error in PMPI_Reduce: Invalid MPI_Op, error stack:
> PMPI_Reduce(1198).......: MPI_Reduce(sbuf=0012FF00, rbuf=0012FF10, 
> count=1, dtyp
> e=0x4c00102b, MPI_SUM, root=0, MPI_COMM_WORLD) failed
> MPIR_SUM_check_dtype(97): MPI_Op MPI_SUM operation not defined for this 
> datatype
> 
> 
>       If so, is there any plan to support this ?
> 
> 
>      Thank you.
> 
> 
> 
>     YIN
> 
> 
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji