Hi Erik, Yes, you've hit the right spot. I'll add this to the C3 tracker.
Thank you for the patch and bug report. We'll get these rolled into the next cut of C3. Thanks, --tjn _________________________________________________________________________ Thomas Naughton naught...@ornl.gov Research Associate (865) 576-4184 On Thu, 13 May 2010, Erik Jacobson wrote: > Hello. It was unclear to me where to send this because the latest version > of c3 isn't on the c3 web site, but rather, we found it over in the oscar > project. I included the C3 contacts and the oscar-devel list in this > email. > > c3-5.0.1-1.src.rpm from oscar's page has a problem when there is a lot of > output. Basically, a write pipe blocks because the process that does to > the reading is in waitpid and not actively reading from the pipe. > > This creates a deadlock. > > In this patch, I moved the waitpid stuff after the pipe reads in the > area that caused the problem. I've attached a patch. > > To duplicate the problem, run the script chunk below with a command similar > to the following (same problem with more than one node; just kept it to > one node for simplicity). > > cexec -p rack_1:15-15 /tmp/runme 2500 > > The script: > > #! /bin/bash > > cnt=1 > while [ $cnt -le $1 ]; do > echo "output line $cnt" > #echo $cnt > let cnt++ > done > > -- > Erik Jacobson - Linux System Software - SGI - Eagan, Minnesota > ------------------------------------------------------------------------------ _______________________________________________ Oscar-devel mailing list Oscar-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/oscar-devel
