From owner-freebsd-java  Thu Mar  8  6: 5: 2 2001
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To: "Ari Suutari" <ari@suutari.iki.fi>
Cc: freebsd-java@FreeBSD.ORG
Subject: Re: Linux jdk 1.3 and Hotspot works!?
In-reply-to: Your message of "Thu, 08 Mar 2001 14:37:18 +0200."
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Date: Thu, 08 Mar 2001 23:03:13 +0900
From: SHUDO Kazuyuki <shudoh@muraoka.info.waseda.ac.jp>
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Hi,

I have a web page which shows performance comparison of
JIT compilers for Linux.
You will be interested in this page:
  http://www.shudo.net/jit/perf/

I tested several benchmark suites including SPEC JVM98
and Linpack benchmark with many Java runtimes on Pentium
III, K6-2 and Crusoe processors.

Ari Suutari wrote:

> Linux JDK 1.3.0_02 seems to work on FreeBSD 4.x-STABLE
> (cvsupped today). What is interesting is that also Hotspot, both
> client and server VM work.
>
> Sample runs of Linpack (modified so that test is run multiple
> times to allow JITs to do their work):

The Linpack benchmark you are using seems to solve
a size 200 x 200 problem.
A benchmark program with a larger (500 x 500) problem set
is also available at the Linpack benchmark for Java page
  http://www.netlib.org/benchmark/linpackjava/

The larger problem set will show results that are closer
to the peak performance because longer computation time
hides JIT compilation time. Oppositely, smaller problem
size tends to reflect JIT compilation time. Each of
larger and smaller problem sets have their merits and
demerits.


> All these runs were made on machine with 650 Mhz pentium.
> This is linux jdk1.3 with Hotspot Client VM:
> (not bad!)

> pommac# /usr/local/linux-jdk1.3.0/bin/java -client -cp . Linpack

> Mflops/s: 85.833  Time: 0.01 secs  Norm Res: 1.43  Precision:
> 2.220446049250313E-16

In this case, the execution time (0.01 sec) is too
short, then the result in Mflops is not very precise.


Kazuyuki SHUDO				Happy Hacking!
  Muraoka Lab., Grad. School of Sci. & Eng., Waseda Univ.

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