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[charm] Program hang when using load balancing and lots of PEs

From: Robert Steinke <rsteinke AT uwyo.edu>
To: Charm Mailing List <charm AT cs.illinois.edu>
Subject: [charm] Program hang when using load balancing and lots of PEs
Date: Tue, 27 Jan 2015 14:51:22 -0700
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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

[charm] Program hang when using load balancing and lots of PEs, Robert Steinke, 01/27/2015
- Re: [charm] Program hang when using load balancing and lots of PEs, Phil Miller, 01/27/2015
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    - Re: [charm] Program hang when using load balancing and lots of PEs, Phil Miller, 01/27/2015