[gmx-developers] Seg fault in mdrun with AltiVec and LZM/PME

Charlie Peck charliep at cs.earlham.edu
Tue Jan 13 11:25:56 CET 2004

We're trying to run the LZM molecule (with the PME configuration)
from the gmxbench 3.0 package with GROMACS 3.1.5_pre1 under
OSX 10.3.2.  When mdrun is compiled with AltiVec support it
seg faults (see below).  With AltiVec support disabled it works
fine (albeit slowly).  We have also tried it under Linux/PPC with
similar results.

Core was generated by `/usr/local/gromacs/powerpc-apple-darwin7.2.0/bin/mdrun'.
#0  0x00196df8 in inl3100_altivec ()
(gdb) where
#0  0x00196df8 in inl3100_altivec ()
#1  0x000dd9e8 in do_fnbf ()
#2  0x000dd9e8 in do_fnbf ()
#3  0x00041040 in force ()
#4  0x0001e808 in do_force ()
#5  0x000159e4 in do_md ()
#6  0x000176c0 in mdrunner ()
#7  0x00017cec in main ()
#8  0x00002838 in _start (argc=10, argv=0xbffffc28, envp=0xbffffc54) 
at /SourceCache/Csu/Csu-46/crt.c:267
#9  0x000026ac in start ()

Any suggestions?

charlie peck

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