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Livermore Computing Workshop Announcement

Title: Sequoia/Vulcan BG/Q Workshop (EC4071)
Date/Time: September 4, 2013
1:00 - 5:00pm
Location: Lawrence Livermore National Laboratory
Laboratory Training Center 2, Trailer 1889 (near the West Gate Badge Office). Directions and contact information are available HERE.
Description: LLNL Sequoia BG/Q system Sequoia is LLNL's 20 Petaflop, IBM BG/Q system, designated as a Tri-lab classified computing resource. Vulcan is LLNL's 5 Petaflop, IBM BG/Q system, available for unclassified ASC and institutional computing. This half-day training session is intended for new users of these systems. Topics covered include:
  • Sequoia/Vulcan General Configuration
  • BG/Q Hardware
  • Accessing LLNL's BG/Q Systems
  • Software and Development Environment
  • Compilers
  • MPI, OpenMP and Pthreads on BG/Q
  • Running Jobs - Batch and Interactive
  • Memory Considerations
  • Transactional Memory and Speculative Execution
  • QPX Floating-point Unit
  • Parallel I/O, HPSS
  • Debugging
  • Performance Analysis Tools
  • Documentation and Additional Information Resources
  • Hands-on Exercises - temporary workshop accounts on the unclassified Vulcan system will be provided for hands-on exercises.
Fee: No cost
Level/Prerequisites: Intended for those who are new to developing parallel programs in the IBM BG/Q environment. A basic understanding of parallel programming with C or Fortran is an essential prerequisite.
Hardcopy: Hardcopy notes will NOT be provided. If you desire a hardcopy version of the tutorial, please go to and print your own hardcopy to bring to class.


Registration is limited to LLNL employees, students, collaborators and LANL and Sandia employees. You must register in advance as there is limited enrollment due to the number of available workstations.

If you are an LLNL employee:

If you are not an LLNL employee:

Questions? Please call or email Blaise Barney (925-422-2578 /