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Forum: Multithreading
Re: Question Multithreading with Visual Studio (Joel Long)
Date: 25 May, 2012
From: Ben Morgan <Ben Morgan>

Hi Joel,

On Wed, 23 May 2012 21:15:17 GMT, Joel Long wrote:
> Hello everyone,
> 
> I am a long time user of MPI for multithreading in Geant4, but when I
> updated from geant4.9.4.p01 to geant4.9.5.p01, I discovered that the MPI
> support (built via one of the examples) was not ported to the new build
> system, which I had used to configure Geant4 natively for Visual Studio.
> 
> On further study, I learned that ParGeant4 was the new intended method
> for implementing parallalism - and it looks like it will fix a lot of
> the inconveniences of using MPI directly - but I cannot find a way to
> build TOP-C to work with VC++. The readme for ParGeant4 as well as for
> TOP-C basically indicates that nothing has been done with it on Windows,
> but I do not have the priveleges to put linux on my machine.
> 
> Can anyone offer any suggestions?

I understand that TOP-C is currently not supported on Windows, though I'm told it could be ported if needed.

For MPI, apologies that the relevant examples weren't ported - there was a huge amount to do and this slipped under. There shouldn't be a problem to build in CMake (which supplies modules to find MPI), so we will look at this for the next release later this year.

Sorry I cant be more help,

Ben.

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