[mpich-discuss] Hydra SIGTSTP (Ctrl+Z) handling

[Pavan Balaji]

SIGTSTP, not SIGINT. Sorry.

On 11/30/2010 09:48 PM, Pavan Balaji wrote:
>
> On 11/30/2010 08:00 PM, Yauheni Zelenko wrote:
>> Why signals could not be trapped in Hydra without relaying to
>> launchers (child processes if I'm correct) in default way? Then it's
>> only matter of transferring signals to proxies via socket.
>
> Passing the signals to the proxy is not a problem. Not relaying it to
> the launchers is the problematic part -- maybe I'm missing something
> straightforward here, but I can't seem to find a way to do this.
>
> Hydra's mpiexec forks a process, which internally execvp's SSH. MPIEXEC
> catches SIGINT and deals with it. However, SSH also catches SIGINT and
> closes all its sockets. I want to avoid the latter part. Is there a good
> way to do this?
>
>    -- Pavan
>

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji