The size parameter to MPI_Win_create should be the size in bytes, and the disp_unit parameter should be sizeofreal, not mpi_real. Rajeev On Apr 26, 2014, at 9:08 PM, Ted Sariyski <[email protected]> wrote:

Attached is a test program (mpi_alloc_mem is called from alloc.c). 'run' will compile tst.f90 and alloc.c, and run the code on two cpus. If line 99, "target_displacement=0", is commented out, code breaks.

/> mpif90 --version GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)

Thanks for the prompt response. --Ted

...

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

On 04/26/2014 11:03 AM, Ted Sariyski 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) ...

-- Ted Sariyski Senior Research Scientist Combustion Research & Flow Technology, Inc. (CRAFT Tech) 6210 Keller's Church Road, Pipersville, PA 18947-1020 Voice: (215) 766-1520 x14; Fax: (215) 766-1524 http://www.craft-tech.com

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