MUST: A Scalable Approach to Runtime Error Detection in MPI Programs

Conference · Wed Mar 24 04:00:00 EDT 2010

DOI:https://doi.org/10.1007/978-3-642-11261-4_5· OSTI ID:974859

Hilbrich, T; Schulz, M; de Supinski, B R; Muller, M

The Message-Passing Interface (MPI) is large and complex. Therefore, programming MPI is error prone. Several MPI runtime correctness tools address classes of usage errors, such as deadlocks or nonportable constructs. To our knowledge none of these tools scales to more than about 100 processes. However, some of the current HPC systems use more than 100,000 cores and future systems are expected to use far more. Since errors often depend on the task count used, we need correctness tools that scale to the full system size. We present a novel framework for scalable MPI correctness tools to address this need. Our fine-grained, module-based approach supports rapid prototyping and allows correctness tools built upon it to adapt to different architectures and use cases. The design uses PnMPI to instantiate a tool from a set of individual modules. We present an overview of our design, along with first performance results for a proof of concept implementation.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 974859
• Report Number(s): LLNL-CONF-426350
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
DESIGN
DETECTION
IMPLEMENTATION
PERFORMANCE
PROGRAMMING