Guest@Hack02 examples]$ mpicxx cpi.c -o cpi [Guest@Hack02 examples]$ gdb cpi GNU gdb Fedora (6.8-29.fc10) Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i386-redhat-linux-gnu"... (no debugging symbols found) (gdb) r Starting program: /home/Guest/Download/mpich2-1.1/examples/cpi (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) [Thread debugging using libthread_db enabled] (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) [New Thread 0xb7fe96d0 (LWP 31328)] Program received signal SIGILL, Illegal instruction. 0x080b315f in MPIDI_CH3I_Seg_commit () Missing separate debuginfos, use: debuginfo-install glibc-2.9-2.i686 libgcc-4.3.2-7.i386 libstdc++-4.3.2-7.i386 (gdb) [Guest@Hack02 examples]$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 10 model name : AMD Athlon(tm) XP 2800+ stepping : 0 cpu MHz : 2079.505 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow up bogomips : 4159.01 clflush size : 32 power management: ts [Guest@Hack02 examples]$ uname -a Linux Hack02.domain.org 2.6.27.5-117.fc10.i686 #1 SMP Tue Nov 18 12:19:59 EST 2008 i686 athlon i386 GNU/Linux [Guest@Hack02 examples]$ [Guest@Hack02 examples]$ mpich2version MPICH2 Version: 1.1 MPICH2 Release date: Unknown, built on Fri Jun 19 14:54:02 EDT 2009 MPICH2 Device: ch3:nemesis MPICH2 configure: -prefix=/opt/mpich2-install MPICH2 CC: gcc -O2 MPICH2 CXX: c++ -O2 MPICH2 F77: gfortran -O2 MPICH2 F90: f95 -O2 [Guest@Hack02 examples]$