[Pvfs2-developers] Re: mpi-io tests

[Sam Lang]

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>