Even discounting price concerns, L1 caches can only increase a certain amount. As the capacity increases, so does the search time for the data, until you find yourself with access times equivalent to the next level down the cache heirarchy, thus negating use of L1. L1 needs to be /quite/ fast for it to be worthwhile.

With any pool of memory, there is some limit to latency and throughput. Thus, the more processing elements you throw at the problem the more they compete for this resource.

Now, if you can separate this memory into discrete pools associated with each processing element, you have less contention (locally) hence the possibility of lower latency and higher throughput (locally).

If you can design your algorithms such that multiple writers (and hopefully readers) to the same location happen infrequently, then you have a net win, despite higher costs addressing foreign memory.

Only until the end of the year, at which point the government is mysteriously discontinuing the software...

Unless you're within the ACT or NT, where X rated material is permitted.

Performed an upgrade (particularly applicable for Gentoo users)?

lsof | grep DEL | grep lib

Lists all libraries which have been deleted and who is using them. Handy for restarting selected applications after updates.