On 12/20/06, Mark Abraham <[EMAIL PROTECTED]> wrote:

Seaclear Theory wrote:
> Hi! All,
>
> I have a linux server with 4 CPUs. How can I run gromacs on all CPUs?
> The gromacs manual has very limit information. And it does not works.

So which part of the manual section entitled "Running GROMACS in
parallel" doesn't work?


What I want is to  run  gromacs  on a signle  machine with multiple
processors.

In "A.5 Running GROMACS in parallel"
"If you have a single machine with multiple processors you don't have to use
the mpirun command,
but you can do with an extra option to mdrun:
% mdrun -np 8 -s topol -v -N 8
In this example MPI reads the first option from the command line. Since
mdrun also wants to
know the number of processes you have to type it twice."



I installed Lam/mpi and compile gromacs with mpi. Thanks lot!

Have you read the man pages for grompp and mdrun closely?

Mark
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