We are pleased to announce the alpha release of OSHMPI-2.1 (version 2.1a1) and the release candidate of OSHMPI-2.0 (version 2.0rc1). OSHMPI is a portable OpenSHMEM implementation on top of MPI. Release tarballs are available at: https://pmodels.github.io/oshmpi-www/downloads.html ### A list of new features in version 2.1a1: - Support a prototype of memory space with CUDA memory kind. - Enable MPI dynamic window based optimization. - Add configure option to force inline performance critical routines. ### A list of new features in version 2.0rc1: - Do not inline performance noncritical paths. - Enable operation tracking to avoid unnecessary network flush. - Enable datatype cache to reduce MPI derived datatype creation overhead at strided operations. - Disable internal assertion when --enable-fast configure option is set. - Update openpa git repository URL. - Bug fixes: + Unsupported MPI datatype with complexd reduce calls. + Compile openpa only when multithread safety is set. Details of each feature can be found in CHANGES (https://github.com/pmodels/oshmpi/blob/main/CHANGES) and README (https://github.com/pmodels/oshmpi/blob/main/README.md). Regards, The OSHMPI Team