I ran the command from the compute node. I also set the number of the threads to 1. mahmood@compute-0-1:tran-bt-o-40$ ulimit -c unlimited mahmood@compute-0-1:tran-bt-o-40$ gdb --args /share/apps/siesta/openmpi-2.0.0/bin/mpirun -hostfile hosts.txt -np sc.sh GNU gdb (GDB) Red Hat Enterprise Linux (7.2-56.el6) Reading symbols from /share/apps/siesta/openmpi-2.0.0/bin/mpirun...done. (gdb) run ... ... [Thread 0x2aaaab447700 (LWP 32506) exited] [Thread 0x2aaaab246700 (LWP 32505) exited] Program exited with code 0204. Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.80.el6_3.6.x86_64 libibverbs-1.1.6-4.el6.x86_64 ibudev-147-2.42.el6.x86_64 (gdb) disas No frame selected. (gdb) x/i $pc No registers. (gdb) q mahmood@compute-0-1:tran-bt-o-40$ ls -l core* -rw------- 1 mahmood nfsnobody 2342809600 Sep 20 23:12 core.5767 >If you can get a core file, then run >$ gdb <binary> <core-file> So, please see the output mahmood@compute-0-1:tran-bt-o-40$ gdb /share/apps/siesta/openmpi-2.0.0/bin/mpirun core.5767 GNU gdb (GDB) Red Hat Enterprise Linux (7.2-56.el6) Reading symbols from /share/apps/siesta/openmpi-2.0.0/bin/mpirun...done. warning: core file may not match specified executable file. [New Thread 5767] .. [New Thread 5784] Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Core was generated by `/share/apps/siesta/siesta-4.0/tpar/transiesta'. Program terminated with signal 4, Illegal instruction. #0 0x00000000008d3a58 in ?? () Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.80.el6_3.6.x86_64 (gdb) disas No function contains program counter for selected frame. (gdb) mahmood@compute-0-1:tran-bt-o-40$ ls -l core* Undefined command: "mahmood". Try "help". (gdb) x/i $pc => 0x8d3a58: Cannot access memory at address 0x8d3a58 (gdb) Do you have any idea? Still I am not able to see the illegal instruction Regards, Mahmood
