JVM Internals:

Doug Hawkins:
http://www.slideshare.net/dougqh
http://www.slideshare.net/dougqh/jvm-mechanics-when-does-the
2017:
JVM Mechanics
https://www.youtube.com/watch?v=htwv78eb4TU

Hotspot:
http://www.oracle.com/technetwork/java/whitepaper-135217.html

CodeCache:
https://docs.oracle.com/javase/8/embedded/develop-apps-platforms/codecache.htm