Charm++ parallel programming system

["Bennion, Brian" <Bennion1 AT llnl.gov>]

My build of namd2.6 in Oct 2007.

Brian


________________________________________
From: Jim Phillips 
[jim AT ks.uiuc.edu]
Sent: Thursday, September 08, 2011 10:25 AM
To: Bennion, Brian
Cc: 
charm AT cs.uiuc.edu
Subject: Re: [ppl] [charm] current results on LLNL cluster

A 25% speedup compared to what?  -Jim

On Thu, 8 Sep 2011, Bennion, Brian wrote:

>
>
>
> Hello,
>
> Compilation of all the suggested versions of charm++ have been completed.
> They were:
> mpi-linux-x86_64
> mpi-linux-x86_64 smp
> net-linux-x86_64 ivberbs
> net-linux-x86_64 ibverbs smp
>
> It appears that the first charmm build is the best for namd2.8.  I saw a
> 25% speedup on my regular jobs using the same processor counts.  No
> extra tricks were employed in compiling charm++ or namd2.8.
>
> The ibverbs version did compile for charm++ and namd2.8 and was even
> able to start.  however, sockets closed prematurely on some node and the
> whole things burns to the ground.
>
> Two quick thoughts here.  First, looking at the charm.XXXXX files that
> are created, they look for some /tmp/charm.XXXX directories that are not
> going to be available.  The tmp filesystem goes by username it
> /tmp/bennion1/XXXXX Second, I will check with our admins to see if using
> ib layer is even permissible.
>
> Brian
>
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