Charm++ parallel programming system

[Phil Miller <mille121 AT illinois.edu>]

The first thing to try would be running with the option "+LBDebug 3" to get some visibility into what's happening in the LB infrastructure. Could you send us output from such a run?

Also, how many objects are you running with across the whole job?

On Tue, Jan 27, 2015 at 3:51 PM, Robert Steinke <rsteinke AT uwyo.edu> wrote:

I have a program that hangs when I run on lots of PEs and use the load balancer (I'm using MetisLB).  If I run on 512 or fewer processors it is fine.  If I try to run on 1024 processors it hangs shortly after I call CkStartLB (I'm using TurnManualLBOn).  Also, if I don't call CkStartLB(); it runs fine on 1024 processors.

Is this a problem that someone else has encountered before?

Is this something that I should try to dig into, or is there someone else more familiar with the load balancer than I am who is willing to look into it, in which case I will apply my effort to creating a minimal test case that reproduces the problem.

Thanks
Bob Steinke

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