Charm++ parallel programming system

[Laércio Lima Pilla <laercio.pilla AT ufsc.br>]

Dear Chris,

I believe you could get some application start and end time estimations by logging them during LB construction and destruction (just make it sure you are doing that in a "if (CkMyPe() == 0){...}").

Now for the application name, unless something changed recently, I believe you may not be able to get that directly in the LB framework. Perhaps a simple workaround would be 'echo'ing the name of the application directly to the log file before the application starts, or 'echo'ing it to a standard file to be read by your LB.

Best regards,

Em 2017-05-25 17:46, Chris Wailes escreveu:

For my research I'm collecting information about task layout during load balancing invocation.  To do this, I've implemented a "dummy" load balancer that collects the data I'm interested in and writes it to a log file.  That part has actually be very easy and straightforward.  However, there are three bits of information I need for bookkeeping purposes that I'm not entirely sure how to obtain: the name of the application, the time the application started, and the time the application ended.

Are these first two pieces of information available from within a load balancer, or will I need to modify other parts of the Charm++ runtime to make it available?  Is there a way to register a callback, so that I can write the timestamp at program exit to my log file?  I'd rather not have to manually collect this information.

In the worst-case scenario I'll just write a wrapper program that collects this information before and after execing the Charm++ program, but it would be nicer to do it all inside Charm++.

- Chris

P.S. I feel bad for spamming the mailing list with trivial questions like this.  Is there a Charm++ IRC room somewhere?

--

Laércio Lima Pilla, PhD.
Associate Professor (Professor Adjunto)
UFSC - CTC - INE, Brazil
Email: laercio.pilla AT ufsc.br or laercio.lima.pilla AT gmail.com
Tel: +55 (48) 9152 8120, +55 (48) 3721 7564
Website: www.inf.ufsc.br/~pilla/