HP-UX Programmer's Guide for Java 2
Table Of Contents
- Table of Contents
- 1 Introduction
- 2 HotSpot Technology Tools and Commands
- 3 Configuration for Java™ Support
- 4 Performance and Tuning
- 5 Measuring System Performance
- 6 Using Threads
- 7 Using Signals
- 8 Using Java™ 2 JNI on HP-UX
- 9 Expanding Memory
- Determine your requirements
- Memory layout under HP-UX 11.0 (PA-RISC only)
- Additional memory available under HP-UX 11i (PA-RISC only)
- Allocating physical memory and swap in the Java™ heap
- Useful key command-line options for allocating memory
- Application-dependent considerations using large heap size HP-UX 11i PA-RISC
- Expanding heap size in native applications on PA-RISC HP-UX 11.11 and later releases
- Expanding heap size in native applications on Integrity HP-UX 11.23 and later releases
- Expanding heap size in HP-UX PA-RISC
- Expanding heap size in HP-UX Integrity
- 10 Diagnosing Memory Leaks
- A JDK/JRE 6.0.n and 7.0.n Usage Notes
- Using Java 2 JNI on HP-UX
- Garbage collection
- Asian TrueType fonts and Asian locales
- Date/Time methods defaults
- Profiling
- Compatibility with previous releases
- Java Cryptography Extension (JCE) policy files
- Configuring the Java Runtime Plug-In
- CLASSPATH environment variable
- Java Web Start technology usage
- Upgrading from a previous Java Web Start version
- IPv6 support
- Allocation Site Statistics and Zero Preparation -Xverbosegc
- JDK 6.0.04 flags
- GC log-rotation support
- NUMA collector enhancements
- ThreadDumpPath support
- Garbage-First garbage collector (-XX:+UseG1GC)
- jmap, jinfo, and jstack tools included in JDK 6.0.03
- Additional Java Web Start documentation
- B JDK/JRE 5.0.n Usage Notes
- Using Java 2 JNI on HP-UX
- Garbage collectors: Parallel and Concurrent Mark Sweep
- Allocating physical memory and swap in the Java heap
- Asian TrueType fonts and Asian locales
- Date/Time methods defaults
- Profiling
- Closing a socket (PA-RISC only)
- Compatibility with previous releases
- Java Cryptography Extension (JCE) policy files
- Allocation Site Statistics and Zero Preparation -Xverbosegc
- IPv6 support on Java 5.0
- GC log-rotation support in 5.0
- ThreadDumpPath support in 5.0
- Dynamically loaded libraries in 5.0
- Performance improvement for String.intern()
- Configuring the Java Runtime Plug-In
- CLASSPATH environment variable
- Java Web Start technology usage
- C SDK/RTE 1.4.2.n Usage Notes
- Removing support for unwanted architectures in the JRE
- Support for dynamic thread local storage (TLS)
- Signal Chaining functionality
- Using Java 2 JNI on HP-UX
- HotSpot JVM options
- Garbage collectors: Parallel and Concurrent mark sweep
- Allocating physical memory and swap in the Java heap
- Asian TrueType fonts and Asian locales
- Date/Time methods defaults
- Profiling
- Closing a socket when accept or read is pending (PA-RISC) - new patch information!
- Compatibility with previous releases
- Runtime Plug-In usage and configuration
- GC log-rotation support
- ThreadDumpPath support
- D Additional Resources
- Index
C SDK/RTE 1.4.2.n Usage Notes
This appendix provides usage notes for the HP-UX Java™ SDK/RTE 1.4.2.n version
stream.
Removing support for unwanted architectures in the JRE
Under the RTE license agreement, partners who redistribute the RTE may remove
support for unwanted architectures. Functional components may NOT be removed
under any circumstances. Beginning with the 1.4.2.05 release, you may remove support
for unwanted architectures as follows
The following commands assume that the RTE has been installed in the standard
location, that is, /opt/java1.4/.
The swremove commands must be run as root. Use these command lines:
• or HP Integrity (Itanium) system, to remove PA_RISC 1.1 support
/usr/sbin/swremove Jre14.JRE14-PA11 Jre14.JRE14-PA11-HS
(The -pa11 command-line option will no longer work.)
• On a PA-RISC system, to remove 64-bit support:
/usr/sbin/swremove Jre14.JRE14-PA20W Jre14.JRE14-PA20W-HS
(The -d64 command-line option will no longer work.)
• On an HP Integrity system, to remove 64-bit support:
/usr/sbin/swremove Jre14.JRE14-IPF64 Jre14.JRE14-IPF64-HS
(The -d64 command-line option will no longer work.)
• PA_RISC 2.0 support is not typically installed on HP Integrity, but if it is, to remove
it:
/usr/sbin/swremove Jre14.JRE14-PA20 Jre14.JRE14-PA20-HS \
Jre14.JRE14-PA20W Jre14.JRE14-PA20W-HS
Support for dynamic thread local storage (TLS)
“Dynamic thread local storage (TLS) support” (page 38). -jp
Dynamic thread local storage is fully supported on all HP Integrity (Itanium) systems,
beginning with SDK Versions 1.4.2.00 and 5.0.
Dynamic TLS is not available on any HP-UX PA-RISC system. However, there is a
workaround:
The libjvm library for the HotSpot 1.4 JVM uses thread local storage (TLS). Currently,
the dynamic loader used by shl_load does not support dynamically loading a shared
library containing TLS when the library was not included in the link line. You may
need to load a library dynamically (using shl_load or dlopen) that contains TLS,
such as libjvm.sl, without having linked your application against it. This might be
the case if your application uses plug-ins. The workaround is the linker feature
LD_PRELOAD, which is available for HP-UX 11.0 in patch PHSS_28434 (or its superseded
Removing support for unwanted architectures in the JRE 89