Date: Thu, 8 Mar 2001 14:37:18 +0200 From: "Ari Suutari" <ari@suutari.iki.fi> To: <freebsd-java@FreeBSD.ORG> Subject: Linux jdk 1.3 and Hotspot works!? Message-ID: <005a01c0a7cc$83622c30$0e05a8c0@coffee>
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Hi,
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):
All these runs were made on machine with 650 Mhz pentium.
This is native FreeBSD jdk without JIT:
pommac# /usr/local/jdk1.2.2/bin/java -cp . Linpack
Mflops/s: 4.547 Time: 0.15 secs Norm Res: 1.33 Precision:
2.220446049250313E-16
Mflops/s: 4.488 Time: 0.15 secs Norm Res: 1.33 Precision:
2.220446049250313E-16
Mflops/s: 4.547 Time: 0.15 secs Norm Res: 1.33 Precision:
2.220446049250313E-16
Mflops/s: 4.547 Time: 0.15 secs Norm Res: 1.33 Precision:
2.220446049250313E-16
Mflops/s: 4.374 Time: 0.16 secs Norm Res: 1.33 Precision:
2.220446049250313E-16
This is native FreeBSD jdk with shujit:
pommac# /usr/local/jdk1.2.2/bin/java -Djava.compiler=shujit -cp . Linpack
shuJIT for Sun JVM/IA-32 Copyright 1998,1999,2000 by SHUDO Kazuyuki
Mflops/s: 22.151 Time: 0.03 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 27.467 Time: 0.03 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 28.611 Time: 0.02 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 28.611 Time: 0.02 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 27.467 Time: 0.03 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
This is linux jdk1.3, with JIT disabled:
pommac# /usr/local/linux-jdk1.3.0/bin/java -Djava.compiler=none -cp .
Linpack
Mflops/s: 4.94 Time: 0.14 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 4.94 Time: 0.14 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 4.769 Time: 0.14 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 4.87 Time: 0.14 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 4.976 Time: 0.14 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
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: 31.212 Time: 0.02 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 52.821 Time: 0.01 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 76.296 Time: 0.01 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 76.296 Time: 0.01 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 85.833 Time: 0.01 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
This is linux jdk1.3 with Hotspot Server VM:
(not bad either!)
pommac# /usr/local/linux-jdk1.3.0/bin/java -server -cp . Linpack
Mflops/s: 6.077 Time: 0.11 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 13.733 Time: 0.05 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 98.095 Time: 0.01 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 85.833 Time: 0.01 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
Mflops/s: 98.095 Time: 0.01 secs Norm Res: 1.43 Precision:
2.220446049250313E-16
It seems that upgrade to -STABLE removed warning messages
issued by hotspot. "native threads" seem to be emulated by processes,
ps -axu
shows on java process per thread when running threaded stuff (like Volano
benchmark,
which by the way doesn't show similar huge increase in speed).
Ari S.
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