Charm++ parallel programming system

[Hrushit Parikh <parikhhrushit AT hotmail.com>]

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