Advanced ARM Forge for Advanced Performance Engineering.

Arm Forge is a cross-platform performance engineering toolkit comprised of Arm DDT and Arm MAP. DDT is a parallel debugger supporting a wide range of parallel architectures and models including MPI, UPC, CUDA and OpenMP, and MAP is a low-overhead line-level profiler for MPI, OpenMP and scalar programs. This tutorial will present Arm Forge and demonstrate how performance problems in applications using MVAPICH2 can be identified and resolved. An approach for identifying communication bottlenecks will be presented that builds from the basics up to advanced features in Arm Forge. We will explore custom metrics for MPI profiling and demonstrate how Arm Forge may be used on extreme-scale applications with extremely low overhead and little or no loss of capability.