[gmx-users] Re: Re: loab imbalance
zhao0139 at ntu.edu.sg
Tue Apr 6 14:54:31 CEST 2010
> lina wrote:
> >> On 6/04/2010 5:39 PM, lina wrote:
> >>> Hi everyone,
> >>> Here is the result of the mdrun which was performed on 16cpus. I am not
> >>> clear about it, was it due to using MPI reason? or some other reasons.
> >>> Writing final coordinates.
> >>> Average load imbalance: 1500.0 %
> >>> Part of the total run time spent waiting due to load imbalance: 187.5 %
> >>> Steps where the load balancing was limited by -rdd, -rcon and/or -dds:
> >>> X 0 % Y 0 %
> >>> NOTE: 187.5 % performance was lost due to load imbalance
> >>> in the domain decomposition.
> >> You ran an inefficient but otherwise valid computation. Check out the
> >> manual section on domain decomposition to learn why it was inefficient,
> >> and whether you can do better.
> >> Mark
> > I search the "decomposition" keyword on Gromacs manual, no match found.
> > Are you positive about that? Thanks any way, but can you make it more
> The title of section 3.17 is "Domain Decomposition" and discusses the algorithm
> and mdrun parameters relevant to controlling performance.
There must be another bible manual I do not know. I checked the one
GROMACS Groningen Machine for Chemical Simulations USER MANUAL
Version 3.3 and 3.2. Can you tell me which manual was the one you
mentioned (better provide the links that I can download if easy for
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