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Subject: Re: [OMPI devel] Simplified: Misuse or bug with nested types?
From: Eric Chamberland (Eric.Chamberland_at_[hidden])
Date: 2013-04-23 09:55:59


Sorry,

here is the attachment...

Eric

On 04/23/2013 09:54 AM, Eric Chamberland wrote:
> Hi,
>
> I have sent a previous message showing something that I think is a bug
> (or maybe a misuse, but...).
>
> I worked on the example sent to have it simplified: now it is almost
> half of the lines of code and the structures are more simple... but
> still showing the wrong behaviour.
>
> Briefly, we construct different MPI_datatype and nests them into a final
> type which is a:
> {MPI_LONG,{{MPI_LONG,MPI_CHAR}*2}
>
> Here is the output from OpenMPI 1.6.3:
>
> Rank 0 send this:
> i: 0 => {{0},{{3,%},{7,5}}}
> i: 1 => {{1},{{3,%},{7,5}}}
> i: 2 => {{2},{{3,%},{7,5}}}
> i: 3 => {{3},{{3,%},{7,5}}}
> i: 4 => {{4},{{3,%},{7,5}}}
> i: 5 => {{5},{{3,%},{7,5}}}
> MPI_Recv returned success and everything in MPI_Status is correct after
> receive.
> Rank 1 received this:
> i: 0 => {{0},{{3,%},{-999,$}}} *** ERROR ****
> i: 1 => {{1},{{3,%},{-999,$}}} *** ERROR ****
> i: 2 => {{2},{{3,%},{-999,$}}} *** ERROR ****
> i: 3 => {{3},{{3,%},{-999,$}}} *** ERROR ****
> i: 4 => {{4},{{3,%},{-999,$}}} *** ERROR ****
> i: 5 => {{5},{{3,%},{-999,$}}} *** ERROR ****
>
> Here is the expected output, obtained with mpich-3.0.3:
>
> Rank 0 send this:
> i: 0 => {{0},{{3,%},{7,5}}}
> i: 1 => {{1},{{3,%},{7,5}}}
> i: 2 => {{2},{{3,%},{7,5}}}
> i: 3 => {{3},{{3,%},{7,5}}}
> i: 4 => {{4},{{3,%},{7,5}}}
> i: 5 => {{5},{{3,%},{7,5}}}
> MPI_Recv returned success and everything in MPI_Status is correct after
> receive.
> Rank 1 received this:
> i: 0 => {{0},{{3,%},{7,5}}} OK
> i: 1 => {{1},{{3,%},{7,5}}} OK
> i: 2 => {{2},{{3,%},{7,5}}} OK
> i: 3 => {{3},{{3,%},{7,5}}} OK
> i: 4 => {{4},{{3,%},{7,5}}} OK
> i: 5 => {{5},{{3,%},{7,5}}} OK
>
> Is it related to the bug reported here:
> http://www.open-mpi.org/community/lists/devel/2013/04/12267.php ?
>
> Thanks,
>
> Eric
>
>
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