[mpich-discuss] mpi_put works only with target_displacement=0

[Rajeev Thakur]

Can you send a small test program that can be compiled and run?

Rajeev

On Apr 26, 2014, at 10:03 AM, Ted Sariyski <tsariysk at craft-tech.com> wrote:

> HI,
> I am trying to apply RMA so that each process evaluates its segment of data and PUTs it at process 0. Here is what I do (see attachment):
> 
>    1. Process 0 creates a window win0 with size=GLOBAL_SIZE of the array
>    2. Rest of processes create NULL() win0 with size 0.
>    3. Eeach  process evaluates it portion dat with size myCount
>    4. All create mpi_shared_lock on 0 (dat on different process are strictly non-overlapping)
>    5. Put dat on 0 with appropriate offset (myOffset)
> 
> Code works on two cpus ONLY when target_displacement=0. If target_displacement=myOffset, I get:
> 
> > rank 0 in job 383  craft28.craft-tech.com_57409   caused collective abort of all ranks
> > exit status of rank 0: killed by signal 11
> 
> What do I miss here?
> 
> Any help will be highly appreciated. Thank in advance,
> --Ted
> 
> P.S. Mixed  C and  fortran90 with  mpich2.1.5 on Linux/x86_64 (CentOS 6.5)
> 
> 
> ...
>   integer(mpi_address_kind) :: size=0,target_displacement=0
>   if ( myid == 0 ) then
>        call mpi_win_create(mdat,size,mpi_realsize,info,comm,win0,ierr)
>    else
>        call mpi_win_create(NULL(),0,1,info,comm,win0,ierr)
>    end if
>    ...
>    target_rank=0
>    call mpi_win_lock(mpi_lock_shared,target_rank,mpi_mode_nocheck,win0,ierr)
>    ...
>    origin_count=myCount
>    target_count=myCount
>    target_displacement=myOffset
>    ...
>    call mpi_put(ldat,origin_count,mpi_real,target_rank,target_displacement,target_count,mpi_real,win0,ierr)
>    ...
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