SciNet User Support Library

System Status: UP

Thu Feb 9 11:50:57 EST 2012

System Temporary Change for MPI ethernet jobs:

Due to some changes we are making to the GPC GigE nodes, if you run multinode ethernet MPI jobs (IB multinode jobs are fine), you will need to explicitly request the ethernet interface in your mpirun:

For Openmpi -> mpirun --mca btl self,sm,tcp

For IntelMPI -> mpirun -env I_MPI_FABRICS shm:tcp

There is no need to do this if you run on IB, or if you run single node mpi jobs on the ethernet (GigE) nodes. Please check GPC_MPI_Versions for more details.

Thu Jan 19 11:12:55 EST 2012

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What's New On The Wiki

• Updates to the page for high performance part of the scientific computing course, including lecture notes and homework assignment (Feb 10)
• SNUG TechTalk about MPI tuning parameters (Feb 6)
• Slides of the lectures of Part II of the Scientific Computing Course (Jan 13-Feb 3)
• Information about part II of the Scientific Computing Course on Numerical Tools for Physical Scientists (Dec 16)
• SNUG Techtalk Dec 2011 Intel Compiler Optimizations (Dec 14)
• Updates on the GPC transition to CentOS 6 (Dec 5)
• Slides and video of the first four Scientific Computing lectures (Nov 4-24)

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News and Recent Events

• Feb 8, 2012: SNUG Meeting TechTalk: Jonathan Dursi: "Tuning your MPI application without writing code: mpitune and otpo"
• Feb 9, 2012: 9am: short downtime
• Feb 10, 2012: Start of SciNet mini-course Scientific Computing III

See also SciNet Courses website and News and Events Archive.