HP-UX Programmer's Guide for Java 2

patches). For HP-UX 11.11 (11i v1), the feature is included. For more information on
LD_PRELOAD functionality and limitations, read the man page for dld.sl after you
have installed the patch.
Signal Chaining functionality
With signal chaining functionality, applications can now use signals that the JVM uses
and they will not interfere with the JVM's functionality. For signal chaining, the
application must load the library libjsig.sl (PA) or libjsig.so (Itanium) before
libc.2.
On PA-RISC, to obtain this functionality, you need to install the patch shown below
and then use LD_PRELOAD. On HP Integrity, no patch and no workaround is needed.
HP-UX 11.11 PA-RISC systems, install patch PHSS_28436 (or the patch that supersedes
it)
For examples and scenarios of how to use LD_PRELOAD, see “Signal chaining
functionality” (page 42).
Using Java 2 JNI on HP-UX
For C and C++ applications, it is important to link with the -mt (multithread) option
if the application calls a Java VM. Both executables and shared libraries must be linked
with -mt. Use of -mt must be consistent during both compilation and linking. For
more information, see “Native (non-Java) calling Java™ methods” (page 52).
If you embed libjvm in a 32-bit native application and wish to use a large Java heap,
you must link with the -N option. For more information, see “ Expanding heap size in
native applications on PA-RISC HP-UX 11.11 and later releases” (page 67) and
“Expanding heap size in native applications on Integrity HP-UX 11.23 and later releases”
(page 67).
HotSpot JVM options
For all standard and non-standard options, please refer to Chapter 2 (page 8).
Garbage collectors: Parallel and Concurrent mark sweep
JavaSoft has implemented new generational collectors that emphasize the throughput
of the application or low garbage collection pause times.
For a detailed look at garbage collection and the new collectors, refer to JavaSoft's
documentation "Tuning Garbage Collection with the 1.4.2 Java Virtual Machine" at
http://java.sun.com/docs/hotspot/gc1.4.2/index.html and http://www.oracle.com/
technetwork/java/javase/tech/index-jsp-140228.html.
Allocating physical memory and swap in the Java heap
The method of allocating physical memory and swap within the Java heap has changed.
As a result, you are likely to see higher RSS (resident set size) memory usage when
monitoring your Java processes with Glance or other tools, or your application startup
may be slightly slower.
90 SDK/RTE 1.4.2.n Usage Notes