Distributed computing demonstrated on orbit?

Has any group of spacecraft demonstrated distributed computing ("a
program is split up into parts that run simultaneously on multiple
computers communicating over a network') while in space? The Emerald
nanosatellite mission was supposed to demo this, but never got
launched. A Surrey website says a loosely coupled version has been
done on today's cosntellations, but it does not say how this has been
done and on what constellation.

Thanks
Matt Bille