[mpich-discuss] MPICh2/Hydra support for debugging

[Ashley Pittman]

On 18 Sep 2012, at 21:13, Nenad Vukicevic wrote:
> On 9/18/2012 11:55 AM, Pavan Balaji wrote:
>> Nenad,
>> 
>> Yes, Hydra supports the debugger MPIR "spec".  The Hydra wiki has information on how to use it.
>> 
>> http://wiki.mcs.anl.gov/mpich2/index.php/Using_the_Hydra_Process_Manager
>> 
>> You don't need to attach to an already running program.  You can start the program through the debugger.
> 
> Thank you. Yes, I know that it is possible to start through the debugger.
> However, if my program for some reason hangs I would like to attach
> to it without restarting. Is this possible?

Yes it is, I maintain a tool which does precisely this which can give parallel stack traces (and other reports) for hung applications.

http://padb.pittman.org.uk/

Ashley.