ok! thanks =)
From: "Mikael Zayenz Lagerkvist" <[EMAIL PROTECTED]>
To: "penche21 penche21" <[EMAIL PROTECTED]>
CC: [EMAIL PROTECTED]
Subject: Re: [gecode-users] quick question
Date: Sun, 15 Apr 2007 15:12:25 +0200
On 4/14/07, penche21 penche21 <[EMAIL PROTECTED]> wrote:
- I use Options.java class for benchmarking. The problem is runtimes
depends
on System.nanoTime() method. So, what I get is basically elapsed time for
program of that time. Is there a way to get the actual user time which
does
not depend on load on my.
There is no possibility that I know of in Java to get user-time.
However, if it were possible I doubt that it would be useful. On my
Windows-machine at least, user-time for a Gecode/J program does not
include time spent in native code, which naturally includes the bulk
of time spent by the program.
I would recommend that you do your experiments on a machine that is as
unloaded as possible, and that you increase the number of samples so
that you get a low enough deviation. Also, the timenogc mode can be
useful. It tries to force Java to do a garbage collection between each
run of the problem, although there is no guarantee.
Also, please remember that Gecode/J is not as fast as Gecode, the
Java-C++ conversions
layer adds quite some overhead.
Cheers,
Mikael
--
Mikael Zayenz Lagerkvist, http://www.ict.kth.se/~zayenz/
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