topic I have updated to Intel MPI in Intel® MPI Library

IRECV/SSEND crashes for Intel MPI Library 2019

John_Young — Mon, 07 Jan 2019 19:29:42 GMT

Hi,

I noticed that one of our MPI codes begin crashing after installing Intel Parallel Studio XE 2019 (Intel MPI Library 2019 Update 1) on Windows. I tracked down the issue to a combination of SSEND/IRECV when the transferred data reaches a certain size. Test code exhibiting the crash is attached. The code does not crash when using Intel Parallel Studio XE 2018 (Intel MPI Library Update 3).

In particular, the 2019 library exhibits a crash when the double precision (square) matrix being transferred has a dimension of around 360-365 in the vicinity of 135K total elements. The crash occurs for both the 4-byte and 8-byte MPI interfaces. My compile and dispatch commands are

mpiifort -fpp -DMPI_MPI_INTEGER_TYPE=4 -DMPI_SYS_INTEGER_TYPE=4 test.F90
mpiexec -n 2 ./test.exe

for the 4-byte interface and

mpiifort -ilp64 -i8 -fpp -DMPI_MPI_INTEGER_TYPE=8 -DMPI_SYS_INTEGER_TYPE=8 test.F90
mpiexec -n 2 ./test.exe

for the 8-byte interface.

Any help or suggested workaround is much appreciated.

Thanks,

John

There is a fix for this

James_T_Intel — Thu, 10 Jan 2019 14:27:10 GMT

There is a fix for this implemented in Intel® MPI Library 2019 Update 2. Until this is released, you can run with I_MPI_FABRICS=ofi to work around this issue.

Great. Thanks for letting us

John_Young — Fri, 11 Jan 2019 13:49:39 GMT

Great. Thanks for letting us know.

John

I have updated to Intel MPI

John_Young — Tue, 26 Feb 2019 17:18:44 GMT

I have updated to Intel MPI Library 2019 Update 2 on MS Windows and the bug still occurs. The originally attached program still crashes at the same place unless I_MPI_FABRICS is set to ofi.

Is there any ETA on when this bug will be fixed?

Thanks,
John

We had an unexpected change

James_T_Intel — Wed, 27 Feb 2019 13:18:57 GMT

We had an unexpected change regarding Update 2, so fixes planned for Update 2 were moved to Update 3. I apologize for the delays, the fix should be available soon.