Hi Sam, Yeah, it looks like it happens on Chiba quite reliably.. aio bug? on my laptop also I cannot reproduce this at all. thanks, Murali
On Mon, 4 Sep 2006, Sam Lang wrote: > > Hi Murali, > > This looks like it might be a timing issue..I'm not able to reproduce > the hang with io (haven't tried with iox) on just one machine with 4 > IO servers running (using --iospec to genconfig). Is it just on > chiba that you see this? > > -sam > > On Sep 3, 2006, at 4:40 PM, Murali Vilayannur wrote: > > > Hey guys, > > Has anybody observed server hangs with HEAD? > > Even a killall -15 is not enough to shut the servers down :( > > because the new termination code does not cause server to exit > > until all > > the state machines terminate. > > > > An easily reproducible test case (atleast on chiba) is to run an > > mpi job > > with sufficiently large number of processes (say 5 or more) > > where each process uses the vfs interface to read/write the same file. > > > > I have checked in a program called io.c and iox.c to the > > posix-extensions-branch that can verify the > > hangs. It does require more than 1 server I think... > > > > mpiexec -n <> io -f /mnt/pvfs2/File -b 1048576 -i 10 -u > > mpiexec -n <> iox -f /mnt/pvfs2/File -b 1048576 -s 1 -m 0 > > > > Any clues appreciated..:) > > Murali > > <io.c> > > <iox.c> > > _______________________________________________ Pvfs2-developers mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
