[gmx-users] segmentation fault from power6 kernel

Mark Abraham Mark.Abraham at anu.edu.au
Thu Nov 3 14:40:39 CET 2011

On 3/11/2011 7:59 PM, Fabio Affinito wrote:
> Thank you, Mark.
> Using GMX_NOOPTIMIZEDKERNELS=1 everything runs fine on power6.
> I also tried to run on a linux cluster and it went ok.

Sounds like a bug. Please file a report here http://redmine.gromacs.org 
<http://redmine.gromacs.org/> including your observations and a .tpr 
that will reproduce them.



> Fabio
>> The most likely issue is some normal "blowing up" scenario leading to a
>> table-lookup-overrun segfault in the 3xx series kernels. I don't know
>> why the usual error messages in such scenarios did not arise on this
>> platform. Try setting the environment variable GMX_NOOPTIMIZEDKERNELS to
>> 1 to see if this is a power6-specific kernel issue. Try running the .tpr
>> on another platform.
>> Mark

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