Davide Mora wrote:
>>Anyway, I'm wondering how much better Java is on the
>>Sparc/Solaris vs.
>>Linux/Intel.
>>
>
> one of our customers moved from w2000 servers to
> sparc/solaris. for what i know under solaris (and
> other unix in general) java work worse than
> windows/linux, checkout this benchmark:
>
> http://www.volano.com/report.html
Actually those benchmarks tell me that the IBM VM is faster, and that
most VMs are slightly faster under Windows than linux.
>
> for what i know (i didnt follow personally the tests)
> there are also problems on the usage of the CPUs in a
> multiprocessor system.
This was a historic problem with Unix VMs, caused by 'grean threads'.
Sun's VMs for Solaris and Linux now both use native threads, so this
isn't so true anymore.
With Linux, however, you'll hit scaling ceilings because of the thread
model. Under Linux, each Java thread corresponds to a kernel thread,
which is basically a process. This is a lot more scheduling load than
the same software will develop under Solaris' thread model.
-danch
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