Toward a Performance/Resilience Tool for Hardware/Software Co-Design of High-Performance Computing Systems

Provided by: Oak Ridge National Laboratory
Topic: Hardware
Format: PDF
xSim is a simulation-based performance investigation toolkit that permits running High-Performance Computing (HPC) applications in a controlled environment with millions of concurrent execution threads, while observing application performance in a simulated extreme-scale system for hardware/software co-design. The presented paper details newly developed features for xSim that permit the injection of MPI process failures, the propagation/detection/notification of such failures within the simulation, and their handling using application-level checkpoint/restart. These new capabilities enable the observation of application behavior and performance under failure within a simulated future-generation HPC system using the most common fault handling technique.

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