An updated PSM library is available at: https://www.openfabrics.org/downloads/infinipath-psm/infinipath-psm-3.3-6_gca75825_open.tar.gz The update addresses the following issues: - Adds support for 2^20 MPI ranks, up from 2^16 - Fixes issue with exhaustion of send tid dma descriptors - Fixes performance issue with PIO Mike