Hi,

In my program I am calling MPI_Barrier(MPI_COMM_WORLD), but it seems to cause an error on one node.  The node changes depending on how many total nodes I have (it could be 4 or 2).  I’m thinking it’s MPI_Barrier because I put print statements around it and that’s where the program terminates.  This is the error message that I get:

Signal:11 info.si_errno:0(Success) si_code:1(SEGV_MAPERR)

Failing at addr:0xc900000002

[0] func:/opt/openmpi/st/lib/libopal.so.0 [0x2aaaab04dbc8]

[1] func:/lib64/libpthread.so.0 [0x3be4f0c530]

[2] func:/opt/openmpi/st/lib/openmpi/mca_pml_ob1.so(mca_pml_ob1_recv+0x2a3) [0x2aaaacf26f33]

[3] func:/opt/openmpi/st/lib/openmpi/mca_coll_tuned.so(ompi_coll_tuned_barrier_intra_recursivedoubling+0x14a) [0x2aaaad8699ba]

[4] func:/opt/openmpi/st/lib/libmpi.so.0(PMPI_Barrier+0xa4) [0x2aaaaad87294]

[5] func:Debug/BioRiskAssessmentMpiLibTest(_ZN2BL14CMpiTestRunner11SynchronizeEv+0xe) [0x490846]

[6] func:Debug/BioRiskAssessmentMpiLibTest(_ZN2BL8CMpiTest12FinishedTestEi+0x3c) [0x490884]

[7] func:Debug/BioRiskAssessmentMpiLibTest(_ZN15CMpiProcessTest8RunTestsEv+0x269) [0x490297]

[8] func:Debug/BioRiskAssessmentMpiLibTest(_ZN29CMpiConsequenceCalculatorTest3RunEP19ompi_communicator_t+0xdf) [0x45a8e7]

[9] func:Debug/BioRiskAssessmentMpiLibTest(_ZN2BL14CMpiTestRunner3RunEv+0x60) [0x4909ba]

[10] func:Debug/BioRiskAssessmentMpiLibTest(main+0x42) [0x44558a]

[11] func:/lib64/libc.so.6(__libc_start_main+0xef) [0x3be481c40f]

[12] func:Debug/BioRiskAssessmentMpiLibTest(__gxx_personality_v0+0x99) [0x4454b9]

*** End of error message ***

I’m using version 1.1.2.  Not sure if it matters, but before I call the MPI_Barrier I create a comm subset (which in this case happens to be all of the same processes that are in MPI_COMM_WORLD).

Does anybody have an idea what might be my problem?  Or what I should do to get more information?

Thanks!

Matt

______________________________
Matt Cupp
Battelle Memorial Institute
Statistics and Information Analysis