" We just opensourced a nice performance analysis tool called Fenxi. Fenxi is a pluggable Java-based post-processing, performance analysis tool that parses and loads the data from a variety of tools into a database, and then allows you to query and compare different sets of performance data. Fenxi can also be used to graph data from performance tools. Fenxi (mandarin for analyze) is the successor to the Sun-internal tool called Xanadu."

read more on Neelakanth Nadgir's blog