ll tuned.
<P>
Full linear speedup (i.e. the same execution time for 1 client on one
processor as 2 clients on 2 processors)
is probably not achievable on this kind of
hardware even with such a small number of processors,
since the memory system is
a major constraint for the garbage collector,
the processors usually share a single memory bus, and thus
the aggregate memory bandwidth does not increase in
proportion to the number of processors. 
<P>
These results are likely to be very sensitive to both hardware