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Date: Fri, 10 Nov 2006 23:49:33 +0100 (CET)
From: "Arne H. Juul" <arnej@pvv.ntnu.no>
To: Nikos Ntarmos <ntarmos@ceid.upatras.gr>
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Cc: freebsd-java@freebsd.org
Subject: Re: Performance of Java on FBSD vs. others...
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On Sat, 11 Nov 2006, Nikos Ntarmos wrote:
>>> I was using -Xms256m -Xmx1024m. Tried with -Xms1024m -Xmx1024m, again
>>> without any noticeable difference.
>>
>> What's "top" look like after running this for a minute or two? You
>> said you had 1G = 1024MB of RAM; trying to have a heap of 1024m you
>> may be swapping like crazy, if so try with 600m to 800m.
>
> Nope, it's not swap that's killing it... The program i'm running is a
> p2p network simulation; first, it generates a number of nodes, then it
> populates the resulting overlay with data, then it queries it. During
> the node generation part, memory requirements are in the vicinity of
> 200-300 MBytes, then they go up as data items get added. However, the
> difference in performance shows up even in this first stage: ~1000'' for
> FreeBSD, ~210'' for win32, ~220 for linux.

is it possible to post the program for others to test? (if there's
no trade secrets or similar in it) I'd like to run it; I've been
compiling my own version of the Java VM with various tweaks
on FreeBSD 4 and this sounds like a better test than the programs
I've been using so far.

   -  Arne H. J.