[gmx-developers] thread problem on AMD 12 core chips?

Berk Hess hess at kth.se
Thu Jan 12 11:17:07 CET 2012

Which compiler is this?
We get lots of warnings with gcc4.6, but we run regularly on 32 and 64 
core nodes.


On 01/12/2012 11:04 AM, David van der Spoel wrote:
> Hi,
> I'm trying to compile and install gromacs release-4-5-patches on a new 
> cluster with four 12-core AMD chips (abisko in Umea, Sweden). However 
> the threaded code bails out with the following message:
> Reading file topol.tpr, VERSION 4.5.5-dev-20120111-9181e (double 
> precision)
> Starting 32 threads
> tMPI error: tMPI Initialization error (in valid comm)
> First, I'm a bit confused why the code detects only 32 cores, second 
> it shows above error and quits.
> Any clues?

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