Javadoc for package XXX

Packages 
Package Description
io.perfmark
PerfMark is a very low overhead tracing library, designed for in-process use.
io.perfmark.impl
Represents implementation pieces to make PerfMark work.
io.perfmark.java6
Java 6 based recorder and generator implementation.
io.perfmark.java7
Java 7 based generator
io.perfmark.java9
Java 9+ enabled generator and mark-holder.
io.perfmark.traceviewer
The Trace View package reads the PerfMark recorded tasks, and converts them into the Chrome Trace Viewer format, bundled into a self-contained HTML page.
io.perfmark.tracewriter
The Trace Writer package reads the PerfMark recorded tasks, and converts them into the Chrome Trace Viewer format.