[gmx-users] DD load balancing is limited by minimum cell size in dimension Z
Mark.Abraham at anu.edu.au
Mon Apr 16 14:44:00 CEST 2012
On 16/04/2012 8:43 PM, Gavin Melaugh wrote:
> Hi all
> What does the following note mean in the log file
> DD load balancing is limited by minimum cell size in dimension Z
> Is is purely a performance related issue ?
Yes. See 3.17.2 for description of DLB. Various algorithms constrain
minimum cell sizes. Perhaps due to inhomogeneous particle distribution,
ideal load balance would require violation of the minimum size. So
GROMACS does the correct thing - compromises load balance (and thus
performance) and lets you know there's an issue.
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