[mvapich-discuss] RMA data corruption in 2.0, 2.1a

[Hajime Fujita]

Dear MVAPICH2 team,

We found a potential bug in MVAPICH2 2.0 and 2.1a regarding RMA.

When we run the attached program on two nodes (1 process/node), it
produces the wrong result. This setting means inter-process
communications goes over InfiniBand.

  # Requesting interactive job with 2 nodes
  $ sinteractive -N 2
  $ mpiexec ./rma_putget_test # launches 2 proc
  loc_buff[1024]=-1 != 1024

If it works correctly, there would be no output.

If we run this on a single machine with multiple processes, it runs
correctly.
If I'm using MPI RMA functions in some incorrect way please let me know.


Hardware platform:
  UChicago RCC Midway
  http://rcc.uchicago.edu/resources/midway_specs.html

MVAPICH versions and configurations:

[hfujita at midway-login1 ~]$ mpichversion
MVAPICH2 Version:     	2.1a
MVAPICH2 Release date:	Sun Sep 21 12:00:00 EDT 2014
MVAPICH2 Device:      	ch3:mrail
MVAPICH2 configure:
--prefix=/project/aachien/local/mvapich2-2.1a-gcc-4.8 --enable-shared
MVAPICH2 CC:  	gcc    -DNDEBUG -DNVALGRIND -O2
MVAPICH2 CXX: 	g++   -DNDEBUG -DNVALGRIND -O2
MVAPICH2 F77: 	gfortran -L/lib -L/lib   -O2
MVAPICH2 FC:  	gfortran   -O2

[hfujita at midway-login1 ~]$ mpichversion
MVAPICH2 Version:     	2.0
MVAPICH2 Release date:	Fri Jun 20 20:00:00 EDT 2014
MVAPICH2 Device:      	ch3:mrail
MVAPICH2 configure:   	--prefix=/software/mvapich2-2.0-el6-x86_64
--enable-shared
MVAPICH2 CC:  	gcc    -DNDEBUG -DNVALGRIND -O2
MVAPICH2 CXX: 	g++   -DNDEBUG -DNVALGRIND
MVAPICH2 F77: 	gfortran -L/lib -L/lib   -O2
MVAPICH2 FC:  	gfortran


Thank you,
Hajime

-- 
Hajime Fujita
Postdoctoral Scholar, Large-Scale Systems Group
Department of Computer Science, The University of Chicago
http://www.cs.uchicago.edu/people/hfujita
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