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Hi,
Michael asked which kind threads one should prefer;
we did a very simple experiment using the IBM JIT and the blackdown JDK in two
absolutely indentical environments (the same computers and so on). What we
firgured out was the following:
it took the blackdown JDK 8000 milis to display the servlet (it did something
like 100 million multiplications ...), the IBM JIT did the same in 500 milis
(no, I didnt mess up the zeros ;-) )
Well this means the IBM JIT is 16 times faster? At least it's faster. Concerning
the native thread/green thread thing:
IBM uses native threads -this could be much faster because the whole
multithread-thing on linux isn't that perfect like multiprocessing? This means,
Linux is great in handling lots of processes, only good in handling threads, I
would think.
What is even more intresting is the fact that more and more multiprocessor
machines become available - this could mean, that the 'pseudo processes' IBM JIT
produces are much more easyer to handle for the OS than the loadbalancing using
green threads.
Well, thats what we found out with 'quick benchmarking' ;-)
Cheers,
Rupert
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