Summary: Needed to update _space_alignment in generation sizer to ensure correct sizing of spaces.
Reviewed-by: jmasa, tschatzl

Reviewed-by: brutisso, tschatzl, mgerdin

Summary: Change checks for isHumongous() to continuesHumongous() as installing a code root for a humongous object is valid, but not for continuations of humongous objects. Cleaned up asserts.
Reviewed-by: jmasa, tamao

7057939: jmap shows MaxNewSize=4GB when Java is using parallel collector
Summary: Major cleanup of the collectorpolicy classes
Reviewed-by: tschatzl, jcoomes

Summary: The field G1AllocRegion::_alloc_region needs to be declared volatile as it is used with that intention. Otherwise the compiler may generate the code that reloads the value which might have changed in the meantime, leading to spurious crashes.
Reviewed-by: iveresov, simonis, tschatzl
Contributed-by: NAxel Siebenborn <axel.siebenborn@sap.com>

Summary: Changed the use of %d to SIZE_FORMAT macro in format string when printing size_t values.
Reviewed-by: stefank, ehelin

Summary: Cleanup related to the NewSize and MaxNewSize bugs
Reviewed-by: tschatzl, jcoomes, ehelin

Summary: Removed the GenRemSet::rem_set_name() since we only have one remset.
Reviewed-by: stefank, mgerdin, tschatzl

Reviewed-by: jcoomes, tamao, tschatzl, stefank

8024954: CMS: CMSClassUnloadingMaxInterval is not implemented correctly. This change is also part of the fix for 8024483.
Reviewed-by: mgerdin, brutisso, tschatzl
Contributed-by: jwha@google.com

Summary: Exit with an error if incompatible NewSize and MaxNeSize are set
Reviewed-by: brutisso, tschatzl

Reviewed-by: brutisso, jmasa, coleenp

Summary: Add a StoreLoad barrier in the G1 post-barrier to fix a race with concurrent refinement. Also-reviewed-by: martin.doerr@sap.com
Reviewed-by: iveresov, tschatzl, brutisso, roland, kvn

Summary: Use instance variables directly within the collector policy classes and remove unused setters.
Reviewed-by: tschatzl, jcoomes

Summary: Removed stray includes and some minor cleanup of GenerationSizer
Reviewed-by: tschatzl, jcoomes

Reviewed-by: tschatzl, jwilhelm, jmasa

8025441: G1: assert "assert(thread < _num_vtimes) failed: just checking" fails when G1ConcRefinementThreads > ParallelGCThreads
Summary: The initialization for the remembered set summary data structures used the wrong thread count, i.e. number of worker threads instead of number of refinement threads.
Reviewed-by: brutisso

Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com

Summary: Add G1BiasedArray<T> that is an array where each element represents a fixed-sized subdivision of the heap. Use this abstraction to refactor the HeapRegionSeq class.
Reviewed-by: brutisso

Summary: Move some G1 specific code from CardTableModRefBS to G1SATBCardTableModRefBS.
Reviewed-by: brutisso, tschatzl, ehelin

Summary: Add memory consumption breakdown on a per region type in the G1 remembered set summary statistics. This simplifies remembered set memory consumption analysis.
Reviewed-by: brutisso

Reviewed-by: kvn, coleenp

Reviewed-by: brutisso, tschatzl

Reviewed-by: jwilhelm, brutisso, tschatzl

Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation.
Reviewed-by: stefank, dholmes

Summary: Correctly calculate the initialization value for the shift between object start and bitmap bit in the G1 mark bitmaps.
Reviewed-by: tonyp

Reviewed-by: coleenp, twisti

8019902: G1: Use the average heap size rather than the minimum heap size to calculate the region size
Reviewed-by: tonyp, tschatzl, sjohanss

Summary: declare all user-defined operator new()s within Hotspot code with the empty throw() exception specification
Reviewed-by: coleenp, twisti, dholmes, hseigel, dcubed, kvn, ccheung
Contributed-by: lois.foltan@oracle.com

Reviewed-by: mgerdin, stefank

Reviewed-by: tonyp, tschatzl

Reviewed-by: ysr, mgerdin

Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso

Reviewed-by: ysr, hiroshi

Reviewed-by: stefank, mgerdin

Summary: Add a list of nmethods to the RSet for a region that contain references into the region. Skip scanning the code cache during root scanning and scan the nmethod lists during RSet scanning instead.
Reviewed-by: tschatzl, brutisso, mgerdin, twisti, kvn

Reviewed-by: jmasa, ehelin

8020598: ObjectCountEventSender::send needs INCLUDE_TRACE guards when building OpenJDK with INCLUDE_TRACE=0
Reviewed-by: stefank, brutisso, sjohanss

Reviewed-by: coleenp, mgerdin, hseigel

Reviewed-by: mgerdin, coleenp, hseigel, jmasa, ctornqvi