Ian It seems then it would be a good idea update the Stampede parameter file in Simfactory to use mvapich instead of impi -- do you agree?
-erik On Mon, Jun 3, 2013 at 12:38 PM, Ian Hinder <[email protected]> wrote: > > On 3 Jun 2013, at 18:02, Roland Haas <[email protected]> > wrote: > > Present: Erik, Peter, Ian, Yosef, Matt, Roland > > automated tests: > > * want to run tests periodically on production machines rather than just > in Ubuntu VM to test other compilers/MPI implementation than gcc/OpenMPI > * Ian has setup for Datura under development, add other machines once > system is stable. This method runs Jenkins on the head node. > * add short (20min or so) simulation to tests to check more complex setups > > ET workshop: > * David Rideout offered to give a presentation (private email to Erik, > hope I did not get this wrong) > * goals: > ** ES wants to improve Carpet scalability to >10^4-10^5 processors > ** (known) bottlenecks are: bboxset class, any lower-d IO which > serializes it seems > * PLEASE think of topics for the workshop and post them to the mailing list > > occasional hangs in MPI reported by Yosef: > * hangs occur with or without the parity thorn > * hangs occur on RIT cluster (with parity thorn, mvapich) > * hangs occur on Stampede (no parity thorn, IMPI) > * Ian saw codes hang in ibrun when MPI versions did not match, this > seems to not be the case here > > > This refers to using a slightly different version of Intel MPI when > building to the one used at runtime (because simfactory didn't load the > module at the time, so it was using what was in the environment; this has > now been fixed). In the end, this was not the cause of the hangs. The > hangs persisted after this fix. To eliminate the hangs (which happened > immediately at startup), I switched from Intel MPI to mvapich on Stampede. > I have also experienced hangs during the simulation with Intel MPI on > Supermuc; there, switching to IBM MPI fixed it. > > -- > Ian Hinder > http://numrel.aei.mpg.de/people/hinder > > > _______________________________________________ > Users mailing list > [email protected] > http://lists.einsteintoolkit.org/mailman/listinfo/users > > -- Erik Schnetter <[email protected]> http://www.perimeterinstitute.ca/personal/eschnetter/
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