Charm++ parallel programming system

[Phil Miller <mille121 AT illinois.edu>]

Hi Hrushit,

The first recommendation I would give is to use the current stable
release of Charm++, 6.6.1:
http://charm.cs.illinois.edu/distrib/charm-6.6.1.tar.gz

Numerous bug-fixes and improvements have been made since version 6.5.1
came out, and it's often unproductive to try to diagnose an error
that's already been fixed.

Thanks,

Phil Miller

On Sun, Feb 15, 2015 at 7:18 PM, Hrushit Parikh
<parikhhrushit AT hotmail.com>
 wrote:
> Hi,
> I am trying to get projections analysis on the UTS benchmark (Tree T1L) in
> charm++ using the "-tracemode projections" option. I use the workstealing
> seed balancer.
>
> I am using charm-6.5.1 version on the UT Austin Stampede cluster. The
> stampede cluster uses ibrun to launch the executable. I have compiled charm
> using ./build charm++ mpi-linux-x86_64   mpicxx  -j16.
>
> With 256 Processors, the T1L run takes only 0.3 seconds when I compile charm
> with the "--with-production" option (to disable traces). However, with
> traces enabled the execution time exceeds 15 minutes and I have to kill the
> program.
>
> I tried running NQueens with the same workstealing balancer on 256
> Processors with traces enabled. For queens upto 19 (grainsize=3) it runs
> fine and projections data is generated, but with 20 queens it takes forever.
>
> Any ideas why UTS takes forever with traces enabled or am I missing
> something?
>
> Thank you,
> Hrushit
>
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