Summary: check cacheline sine only for one core on sun4v SPARC systems.
Reviewed-by: kvn

Summary: Chcek both l2-dcache-line-size and l2-cache-line-size properties to determine the size of the line
Reviewed-by: kvn

Summary: Optimize traversals of the PICL tree
Reviewed-by: kvn

Reviewed-by: asaha

Summary: CMSClassUnloadingEnabled and ExplicitGCInvokesConcurrentAndUnloadsClasses should be disabled when -Xnoclassgc is specified
Reviewed-by: jmasa, kbarrett

Reviewed-by: katleman

Reviewed-by: jrose, ahgross, alanb, bmoloden