Charm++ parallel programming system

[Alexander Frolov <alexndr.frolov AT gmail.com>]

Hi!

I am profiling my application with projections and found out that usage profile is terribly low (~45%) for the cases when 2 and more cores are used (at the moment I am investigating scalability inside of single smp node). For single pe the usage profile is about 65% (does not look good as well).

I would suppose that something wrong with mpi environment (for eg. mpi-process are continuously switched between cores). But maybe the problem in charm++ configuration?

Has anybody met with similar behavior of charm++ applications? That is there is no scalability when it is expected... 

Any suggestions would be very appreciated! :-)

Hardware:

x2 Intel(R) Xeon(R) CPU E5-2690 with 65868940 kB of memory

System software:

icpc version 14.0.1, impi/4.1.0.030

Charm++ runtime:

./build charm++ mpi-linux-x86_64 mpicxx -verbose 2>&1

ps. I checked with --with-production option but it does not improved the situation significantly.

Best,

   Alex