[mpich-discuss] Hydra: LSF resource querying in exclusive mode

[Yauheni Zelenko]

Hi!

Yes, LSB_MCPU_HOSTS doesn't reflect all CPUs on host. There are no other environment variable set and only way to find out bsub mode is to use bjobs and grep it output (which may be split between different lines).

Platform person told about bsub wrapper script which set additional environment variable in this case, but it doesn't not distributed with LSF.

Eugene.
________________________________________
From: Pavan Balaji [balaji at mcs.anl.gov]
Sent: Wednesday, November 10, 2010 5:08 PM
To: mpich-discuss at mcs.anl.gov
Cc: Yauheni Zelenko
Subject: Re: [mpich-discuss] Hydra: LSF resource querying in exclusive mode

Hi,

On 11/10/2010 04:02 PM, Yauheni Zelenko wrote:
> We find out that LSF (at least 7.0.5) didn't set LSB_MCPU_HOSTS
> properly with bsub -x (exclusive access). In this case all CPUs on
> host may be used by program. For MPICH2 it's mean that it may launch
> as much processes and number of physical CPUs.

Thanks. Can you give some more information on what it sets and what it
doesn't? Is LSB_MCPU_HOSTS being set to an incorrect value? What other
environment variables are set and what are their values?

  -- Pavan

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