Portals 3.3 was the final specification in the Portals 3 series of specifications. Portals 3 was the first Portals implementation to adopt a function-based API, instead of the structure-based building blocks found in previous implementations. Portals 3 saw use on both the Cplant platform (Portals 3.0) and the Cray Red Storm/XT3/XT4/XT5 series (Portals 3.3).
A reference implementaiton of Portals 3.3 was developed during development of the specification. The implementation provides a layered approach suitable for developing advanced implementations, including those over hardware.
Note that the Portals 3.3 reference implementation is no longer supported. We provide the code for historical purposes.