Package: sun-java6-jdk Version: 6-02-1 Severity: normal
Hello. When running a medium-size simulation program, I get contradictory performances if "java" is launched with the "-Xint" option or not. Let me elaborate: At some point of the simulation, the same quantity Q can be computed in 2 different ways, say "QH" and "QL". When using "QL", the program is about twice as fast as when using "QL". This is confirmed when using "-Xint". Leaving out "-Xint" (for maximum performance), the result is, quite surprisingly, the other way around: Using "QL" is about 50% slower than with "QH"! Doesn't this indicate some subtle bug in the JIT compiler? Note that I recompiled everything with java 1.5, and there, the results between interpreted bytecode and JIT-compiled code are consistent. Best regards, Gilles -- System Information: Debian Release: lenny/sid APT prefers unstable APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable') Architecture: i386 (i686) Kernel: Linux 2.6.19.1g1 (PREEMPT) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/bash Versions of packages sun-java6-jdk depends on: ii debconf [debconf-2.0] 1.5.14 Debian configuration management sy ii libc6 2.6-5 GNU C Library: Shared libraries ii libx11-6 2:1.0.3-7 X11 client-side library ii sun-java6-jre 6-02-1 Sun Java(TM) Runtime Environment ( sun-java6-jdk recommends no packages. -- debconf information excluded -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
