[mvapich-discuss] Problem with MVAPICH and Intel compilers on Glenn and BALE

[James Giuliani]

I have finally been able to reproduce a memory problem that occurs with MVAPICH and the Intel compilers.

I have been able to reproduce the problem down to a series of F90 allocates and deallocates in the attached f90 code.

To summarize the behavior, with the following environment:

mvapich (0.9.9 or 1.1)
Intel compilers (v10)

the attached program will hang after 70,520 loop iterations.  If you set the loop logic to exit after 500 iterations, MPI_FINALIZE dies with a segmentation violation.

mpiexec -n 1 ./test
going back in loop         1
going back in loop         2
..
..
going back in loop         499
going back in loop         500
forrtl: severe (174): SIGSEGV, segmentation fault occurred
Image              PC                Routine            Line        Source             
libpthread.so.0    00002AC8C53FFE70  Unknown               Unknown  Unknown
libmpich.so.1.0    00002AC8C4D0AB91  Unknown               Unknown  Unknown
libmpich.so.1.0    00002AC8C4D0940D  Unknown               Unknown  Unknown
libmpich.so.1.0    00002AC8C4D22A91  Unknown               Unknown  Unknown
libmpich.so.1.0    00002AC8C4CE0BBB  Unknown               Unknown  Unknown
libmpich.so.1.0    00002AC8C4CE0912  Unknown               Unknown  Unknown
test               0000000000405A17  Unknown               Unknown  Unknown
test               0000000000403D42  Unknown               Unknown  Unknown
libc.so.6          00002AC8C5AB68B4  Unknown               Unknown  Unknown
test               0000000000403C69  Unknown               Unknown  Unknown

This problem does not appear if:

1) You compile with Portland group compiler
2) You move the MPI_INIT until after the loop

Is anyone aware why this may be a problem?

-------------- next part --------------
A non-text attachment was scrubbed...
Name: test.f90
Type: application/octet-stream
Size: 2833 bytes
Desc: not available
Url : http://mail.cse.ohio-state.edu/pipermail/mvapich-discuss/attachments/20090616/bc38aa29/test.obj