[mvapich-discuss] NBP Data Traffic Verification Fail

[Hoang-Vu Dang]

The benchmark is DT MPI version inside this tarball

http://www.nas.nasa.gov/assets/npb/NPB3.3.1.tar.gz

It's make with mvapich2 2.1 (gcc/4.9.1) on Stampede cluster with:

cd ~/NPB3.3.1/NPB3.3-MPI/DT
make CLASS=A

Run wit problem SH for example:

MV2_USE_SHARED_MEM=0 ibrun -np 80 ./dt SH

Sometimes it give correct results:

 DT_SH.A L2 Norm = 610856482.000000
 Deviation = 0.000000

Sometimes it gives wrong:

 DT_SH.A L2 Norm = 571204151.000000
 The correct verification value = 610856482.000000
 Got value = 571204151.000000

Is there anything I can do to debug ? Is it reproducible ?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cse.ohio-state.edu/pipermail/mvapich-discuss/attachments/20160429/79d0b262/attachment.html>