Performance of Java on FBSD vs. others...

[Achilleas Mantzios]

Στις Τρίτη 12 Δεκέμβριος 2006 17:25, ο/η Palle Girgensohn έγραψε:
> Hi!
>
> This mail thread died a while back. Any news, did you succeed in getting it
> faster?
>
> We are experiencing similar slowness with tomcat - it seems it runs much
> faster on Linux. I have not done any tests yet, it is just a feeling, but
> developers here are already moaning and want to replace FreeBSD with Linux.
> I'd love to get the BSD boxes running as fast instead... Any input
> appreciated.
>

Sorry, that i dont have smth specifically useful to say here,
but i think that some kind of feedback would give a better
feeling to all people in the list, that extra (cycological) support
that could keep a person from making the final switch to
linux.

Raising such an important issue as the current thread,
i think deserves something more than complete silence.

If Nikos Ntarmos is around, anything related would be appreciated.
Are these clock related issues worth intergrating into the patch?
Any progress ?

(I dont mean to sound like yet aonother "i want it all now, so you do it now 
for me please" kind of newbie,
i am writing this if nothing else to give some life to the thread).

> Regards,
> Palle
>
> --On fredag, november 10, 2006 22.37.14 +0200 Nikos Ntarmos
>
> <ntarmos at ceid.upatras.gr> wrote:
> > Hi all.
> >
> > I've spent the last week or so running the exact same Java code on the
> > exact same hardware, under different OSs. The code i'm running is
> > heavily cpu-bound (no i/o other than light logging), uses a lot of
> > memory (~1G), and does not rely on threading libraries (i.e. the program
> > creates two threads when it starts and that's all about it).
> >
> > I'm running a small and a large version of the program (wrt memory
> > requirements and run-time). The average execution time for the small
> > version goes from ~200'' under win32, to ~220'' under linux, and to
> > ~800'' under freebsd. For the large version, the numbers are ~1600''
> > for win32, ~1800'' for linux, and ~4700'' for freebsd.
> >
> > This is all on a 1.7GHz Pentium-M laptop with 1G RAM (dmesg at
> > http://ntarmos.dyndns.org/Computers/dmesgs/ace.dmesg), running -current
> > as of Sep 29. The JDKs tested are diablo-jdk15 (1.5.0.07.01) and
> > sun-jdk15 (1.5.0p6) for FreeBSD, and sun-jdk15 (1.5.0_07) for linux and
> > win32.
> >
> > Does anybody else see such a performance drop across OSs? Is there some
> > specific (known) reason why freebsd lags behind the other two OSs by
> > this 3x-4x factor? Any pointers as to some (sysctl or other) knob I've
> > missed?
> >
> > Thanks in advance.
> >
> > \n\n
> > _______________________________________________
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>
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-- 
Achilleas Mantzios