Summary: The free list is being maintained in a sorted fashion and old and humongous regions are allocated from the bottom of the heap while young regions are allocated at the top.
Reviewed-by: tschatzl, mgerdin
Contributed-by: jesper.wilhelmsson@oracle.com, staffan.friberg@oracle.com

Summary: Pad and cache-align BiasedMappedArray instances by default to avoid performance variability problems due to false sharing, as instances of this data structures are typically used for performance sensitive code.
Reviewed-by: brutisso, stefank

Summary: Mentioned closures are actually wrapped methods. This adds confusion to readers, and in this case also increases code size as G1ParScanHeapEvacClosure is part of the oop_oop_iterate() methods. Move them into G1ParScanThreadState as methods.
Reviewed-by: stefank

Summary: Refactor the From Card Cache into a separate class.
Reviewed-by: jmasa

Summary: Detailed breakdown of time spent in the evacuation failure handling phases to make the "Other" time roughly correspond to the sum of its parts.
Reviewed-by: jwilhelm, jmasa

Summary: Show the time taken by card redirtying during GC in a new "Redirty Cards" line.
Reviewed-by: jwilhelm, brutisso

Summary: Improve fast card cache iteration and avoid taking locks when freeing the collection set.
Reviewed-by: brutisso

Summary: The from card cache is a very frequently accessed data structure. It is essentially a 2d array of per-region values, one row of values for every GC thread. Pad and align the data structure to avoid false sharing.
Reviewed-by: stefank

Summary: Change the code cache remembered sets data structure from a GrowableArray to a chunked list of nmethods. This makes the data structure more amenable to parallelization, and decreases freeing time.
Reviewed-by: mgerdin, brutisso

Reviewed-by: brutisso, tschatzl

Reviewed-by: brutisso, tschatzl

Reviewed-by: tschatzl, pliden

Reviewed-by: tschatzl, pliden

Summary: enable type speculation
Reviewed-by: kvn

Summary: check fr.sender_sp() in java thread instead of os::is_first_C_frame(&fr).
Reviewed-by: twisti, coleenp

8035841: assert(dp_src->tag() == dp_dst->tag()) failed: should be same tags 1 != 0 at ciMethodData.cpp:90
Summary: concurrent update of traps with construction of ciMethodData
Reviewed-by: kvn, twisti

Summary: favor profile data coming from outer most method
Reviewed-by: kvn, twisti

Summary: Add support for BMI1 instructions
Reviewed-by: kvn, roland

Summary: added missing check for loop padding case.
Reviewed-by: kvn, jrose

Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com

8025644: java/util/stream/test/org/openjdk/tests/java/util/stream/ToArrayOpTest.java fails with TestData$OfRef): failure java.lang.AssertionError: expected [true] but found [false]
Summary: In GraphKit::gen_checkcast() provide only exact superklass to GraphKit::maybe_cast_profiled_receiver()
Reviewed-by: kvn, roland

Reviewed-by: dcubed, mgronlun

8031752: Failed speculative optimizations should be reattempted when root of compilation is different
Summary: support for speculative traps that keep track of the root of the compilation in which a trap occurs.
Reviewed-by: kvn, twisti

Summary: Remove search in system dictionary and hacks, replace with verifying in CLD::_klasses list.
Reviewed-by: dcubed, acorn

Reviewed-by: mgerdin, jmasa
Contributed-by: matthias.baesken@sap.com

Summary: Moved test code inside INCLUDE_ALL_GCS
Reviewed-by: stefank, ehelin

Summary: Move redo of ParkEvent.unpark() after JVMTI_EVENT_MONITOR_WAITED event handler is called.
Reviewed-by: rdurbin, acorn, sspitsyn, dsimms, dholmes

Summary: Revert JDK-6976350 because it does not improve PLAB fragmentation. To the contrary, it tends to increase the amount of wasted space with many threads.
Reviewed-by: brutisso

Summary: Move G1ParCopyClosure::copy_to_survivor_space to decrease code size.
Reviewed-by: stefank, jmasa

Summary: Remove the assumption that G1CollectedHeap::in_cset_fast_test needs to check for NULL references. Most of the time this is not required, making the code doing this check multiple times.
Reviewed-by: stefank, mgerdin, jmasa

Summary: Move methods that are not dependent on any of G1ParCopyClosure's template parameters into G1ParCopyHelper. Further remove unused methods and members of the class hierarchy.
Reviewed-by: mgerdin, stefank

Summary: AltHashing used jint the way of juint in bit shifting which could lead loss of precision. Fix  by change _seed defined as juint.
Reviewed-by: coleenp, ccheung
Contributed-by: yumin.qi@oracle.com

Reviewed-by: tonyp, tschatzl

Summary: When string and symbol table unlink are not performed in parallel, the claim index we check is not updated, and so a guarantee fails. Take this into account when checking the guarantee.
Reviewed-by: brutisso, jwilhelm

8033106: Wrong predicate for checking whether the correct amount of symbol table entries have been processed in G1
Summary: The change fixes the predicate check.
Reviewed-by: jmasa, tonyp, stefank

Summary: Clean up and slightly optimize reference handling from the GC reference task queue. Since we never push partial array chunks as narrowOop* we can manually specialize the code so that some code can be optimized away.
Reviewed-by: tonyp, brutisso, stefank

Summary: Made the flags Min- and MaxHeapFreeRatio manageable, and implemented support for these flags in ParallelGC.
Reviewed-by: sla, mgerdin, brutisso

Summary: Switch off EliminateAutoBox flag by default in jdk8 release.
Reviewed-by: iveresov

Reviewed-by: tschatzl, stefank, jmasa

8028553: The JVM should not throw VerifyError when 'overriding' a static final method in a superclass.
Summary: Check if method is static before throwing exception.
Reviewed-by: kamg, coleenp, lfoltan, fparain