[mpich-discuss] Hydra torque support issues

Reuti reuti at staff.uni-marburg.de
Fri Apr 19 03:38:54 CDT 2013


Am 19.04.2013 um 09:10 schrieb Pavan Balaji:

> On 04/18/2013 06:56 PM US Central Time, Bharath Ramesh wrote:
>>> I'm particularly interested in whether mpiexec recognizes pbs as a
>>> possible launcher or not.  If it recognizes pbs as a launcher, it should
>>> automatically select it where possible.
>> It is using pbs as the launcher. The problem is with the setting of the
>> session id for the forked hydra_pmi_proxy process on mother superior.
>> Since the hydra_pmi_proxy process has the session id set to the bash
>> process instead mpi_exec process. As a result of this torque is unable
>> to track the resources consumed by the process. If you look at the
>> openmpi processes their session id is set correctly and torque is able
>> to track the resources consumed.
> Ah, OK.  Sorry I lost track of the original issue in this email chain.
> You are right about this issue.  The basic problem is that launching
> proxies using tm_spawn tends to create a different session ID for them.

Isn't it more an issue of Torque? IMO it should either disallow a local TM invocation and return an error, or do correct accounting of it.

-- Reuti

> I've created a ticket to track it:
> https://trac.mpich.org/projects/mpich/ticket/1812
> -- Pavan
> -- 
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
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