We propose extending common performance measurement and visualization tools to identify network bottlenecks within MPI collectives. By creating additional trace points in the Peruse utility of Open MPI, we track low-level InfiniBand communication events and then visualize the communication profile in Boxfish for a more comprehensive analysis. The proposed tool-chain is non-intrusive and incurs less than 0.1% runtime overhead with the NPB FT benchmark.
各種検索
サポート
ヘルプ