MPICH 3.3rc1 released

A new release candidate of MPICH, 3.3rc1, is now available for download. MPICH 3.3 contains a new (non-default) device layer implementation – CH4. CH4 is designed for low software overheads to better exploit next-generation hardware. An OFI ( or UCX ( library is required to build CH4. Example configure lines:

./configure --with-device=ch4:ofi --with-libfabric=<path/to/ofi/install> ./configure --with-device=ch4:ucx --with-ucx=<path/to/ucx/install>

Unless critical bugs are found, this release would be identical to the final 3.3 GA release (apart from the version number change).

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