A free profiling tool from HP (Hewlett Packard) for analysing the prodigous
output of the various built-in JVM (Java Virtual Machine)
profilers. It will sort and analyse the data in dozens of different ways. It comes
with decent online help. It comes as a jar file you just execute and feed a profile
output file. HPjmeter can perform real-time monitoring of Java applications. It can
also do offline analysis of many types of data files — heap dumps, -Xloggc and -Xverbosegc data and
HP ’s extended
profiling (-Xeprof) data.