With last night's master tarball (openmpi-dev-845-ga3275aa) on a Linux/x86-64 system, I am seeing a crash (below) from ring_c run on a login node. Other than CC/CXX/FC settings I've configured with only --prefix=... --enable-debug --with-tm=...
This is occurring with at least the Gnu, Intel, PathScale and Open64 compilers (PGI has other issues). Only the Intel build gave me a usable backtrace, which is given below along with the command line and output. A fresh build of 1.8.4 on the same system with the same configure args does NOT have this problem. -Paul $ mpirun -mca btl sm,self -np 2 examples/ring_c' libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs2 libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs1 libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs2 libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs1 libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs2 libibverbs: Warning: no userspace device-specific driver found for /sys/class/infiniband_verbs/uverbs1 Process 1 exiting Process 0 sending 10 to 1, tag 201 (2 processes in ring) Process 0 sent to 1 Process 0 decremented value: 9 Process 0 decremented value: 8 Process 0 decremented value: 7 Process 0 decremented value: 6 Process 0 decremented value: 5 Process 0 decremented value: 4 Process 0 decremented value: 3 Process 0 decremented value: 2 Process 0 decremented value: 1 Process 0 decremented value: 0 Process 0 exiting [cvrsvc04:26446] *** Process received signal *** [cvrsvc04:26446] Signal: Segmentation fault (11) [cvrsvc04:26446] Signal code: Address not mapped (1) [cvrsvc04:26446] Failing at address: 0x7fc828289aaf [cvrsvc04:26446] [ 0] /lib64/libpthread.so.0[0x7fc8f943db10] [cvrsvc04:26446] [ 1] /usr/lib64/libmlx4-m-rdmav2.so[0x7fc8f6491091] [cvrsvc04:26446] [ 2] /usr/lib64/libmlx4-m-rdmav2.so(__mlx4_cq_clean+0x69)[0x7fc8f64912b9] [cvrsvc04:26446] [ 3] /usr/lib64/libmlx4-m-rdmav2.so(mlx4_cq_clean+0x3e)[0x7fc8f649146e] [cvrsvc04:26446] [ 4] /usr/lib64/libmlx4-m-rdmav2.so(mlx4_modify_qp+0xb7)[0x7fc8f6494a87] [cvrsvc04:26446] [ 5] /usr/lib64/libibverbs.so.1(ibv_modify_qp+0x24)[0x7fc8f6abbae4] [cvrsvc04:26446] [ 6] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/lib/openmpi/mca_oob_ud.so(mca_oob_ud_qp_to_reset+0xc8)[0x7fc8f6cca228] [cvrsvc04:26446] [ 7] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/lib/openmpi/mca_oob_ud.so(mca_oob_ud_event_stop_monitor+0x92)[0x7fc8f6cc8d32] [cvrsvc04:26446] [ 8] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/lib/openmpi/mca_oob_ud.so[0x7fc8f6cc5baf] [cvrsvc04:26446] [ 9] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/lib/libopen-rte.so.0[0x7fc8fa4c3db0] [cvrsvc04:26446] [10] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/lib/libopen-pal.so.0(mca_base_framework_close+0x6e)[0x7fc8fa15ed6e] [cvrsvc04:26446] [11] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/lib/openmpi/mca_ess_hnp.so[0x7fc8f7f1987a] [cvrsvc04:26446] [12] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/lib/libopen-rte.so.0(orte_finalize+0x5d)[0x7fc8fa46812d] [cvrsvc04:26446] [13] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/bin/mpirun(orterun+0x1c5f)[0x4071ed] [cvrsvc04:26446] [14] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/bin/mpirun(main+0x20)[0x404d68] [cvrsvc04:26446] [15] /lib64/libc.so.6(__libc_start_main+0xf4)[0x7fc8f90f5994] [cvrsvc04:26446] [16] /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-master-linux-x86_64-icc-11.1/INST/bin/mpirun(orte_daemon_recv+0x2f9)[0x404c99] [cvrsvc04:26446] *** End of error message *** -- Paul H. Hargrove phhargr...@lbl.gov Computer Languages & Systems Software (CLaSS) Group Computer Science Department Tel: +1-510-495-2352 Lawrence Berkeley National Laboratory Fax: +1-510-486-6900