Description of the flags for the JRockit VM SPECjbb2000 Results
Appeal Virtual Machines

01/24/2002

The default behavior of JRockit is to quickly JIT all methods the first
time they are executed. JRockit then analyzes the system to find the
methods which are "hotspots". These methods are then re-JIT:ed with the
optimizing compiler. The -XXoptall option enables the optimizing
compiler on all methods the first time they are executed. 

The -Xnoinvcount option disables the use of method invocation counters
normally used to find "hotspot" methods. The counters are not necessary
when running with the -XXoptall option.

The -XXclm:2m option limits the amount of heap taken up by semi
permanent objects associated with classloaders to 2 MB of memory, thus
allowing more space for the ordinary object heap.