Title: PAPI port to BlueGene/L Abstract: PAPI aims to provide the tool designer and application engineer with a consistent interface and methodology for use of the performance counter hardware. The goal of this project is to implement PAPI 3 on BG/L and use its API to access the BG/L specific network counters. The data extracted via PAPI will be used to determine an optimal task layout to increase performance on BG/L.