On multi-user, multi-job parellel enviromnent build upon
workstation clusters, fast user level communication and
synchronization method is needed.
We are developping a high speed, enhanced gigabit switching
network system which cooperates our general purpose massively
parallel operating system.  Memory based communication is the
basic communication method for user level communication.
Memory based communication requires address translation
mechanism, and integrating it into network interface card
can reduce the overhead of software translation.
We have implemented address translation buffer into the
network interface card, and evaluated the speed of
memory based communication that utilize hardware address
translation buffer.