On Mon, Feb 6, 2012 at 10:27 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> > Are _all_ the processes making it here? > Sigh. I knew someone was going to ask that ;-) I'll have to write a short script to grab the stack trace from every one of the 10,000 processes to see where they are and try to find any anomalies. Anyone have a script (or pieces of one) to do this that they wouldn't mind sharing? I did spot check quite a few and they were all in the same spot. Now here comes the weirdness: I left one of these processes attached in GDB for quite a while (10+ minutes) after the whole job had been hung for over an hour. When I noticed that I had left it attached I detached GDB and.... the job started right up! That is: it moved on past this problem! How is that for some weirdness. It might have just been coincidence... or maybe me stalling that process for a bit by attaching GDB nudged some communication in the right direction... I don't know. I know that's not terribly scientific. I'll have to wait until the next job hangs before I can do more inspection, but when (not if) that happens I'll post back with more info. Derek -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120206/404760a3/attachment.htm>
