Summary: Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.
Reviewed-by: jcoomes, jmasa, kvn, never

Reviewed-by: tonyp, iveresov

Reviewed-by: jmasa, iveresov

Reviewed-by: tonyp, iveresov

Summary: Override should_remember_klasses() and remember_klass() as needed.
Reviewed-by: ysr, jcoomes

Summary: Removing the concurrent overhead tracker from G1, along with the GC overhead reporter and the G1AccountConcurrentOverhead (both of which rely on the the concurrent overhead tracker).
Reviewed-by: iveresov, johnc

Reviewed-by: jcoomes, tonyp

Reviewed-by: iveresov, tonyp, ysr

Reviewed-by: ysr, never, kvn

Summary: switch them from product to experimental; 6817525 will toggle them and switch to diagnostic
Reviewed-by: kvn

Reviewed-by: kvn, dcubed

Summary: JPRT: elide GCBasher_G1 test on winx64 until 6867250 is resolved
Reviewed-by: jcoomes

6821507: Alignment problem in GC taskqueue
Reviewed-by: tonyp, apetrusenko

Summary: Improvement on reexecute implementation to fix the assertion failure
Reviewed-by: kvn, never

Summary: Increase timeout for tests and heap size for 6851282 test.
Reviewed-by: never, cfang

Summary: The first worker thread is delayed when entering the GC because it clears the card count table that is used in identifying hot cards. Replace the card count table with a dynamically sized evicting hash table that includes an epoch based counter.
Reviewed-by: iveresov, tonyp

Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp

Summary: In the assertion allow for collision with the guard page.
Reviewed-by: tonyp, ysr, jcoomes

Summary: Use NewRatio if it is explicitly set.
Reviewed-by: ysr, jcoomes

Summary: developed a reexecute logic for the interpreter to reexecute the bytecode when deopt happens
Reviewed-by: kvn, never, jrose, twisti

Summary: Produce narrow type for new Phi from the original Phi type.
Reviewed-by: cfang

Summary: Always use "lea" instruction for narrow oop decoding instead of "shift".
Reviewed-by: never