6976350: G1: deal with fragmentation while copying objects during GC Summary: Create G1ParGCAllocBufferContainer to contain two buffers instead of previously using one buffer, in order to hold the first priority buffer longer. Thus, when some large objects hits the value of free space left in the first priority buffer it has an alternative to fit in the second priority buffer while the first priority buffer is given more chances to try allocating smaller objects. Overall, it will improve heap space efficiency. Reviewed-by: johnc, jmasa, brutisso Contributed-by: tamao <tao.mao@oracle.com>

8015244: G1: Verification after a full GC is incorrectly placed. Summary: In a full GC, move the verification after the GC to after RSet rebuilding. Verify RSet entries during a full GC under control of a flag. Reviewed-by: tschatzl, brutisso

8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen Summary: Fixed the output of G1SummarizeRSetStats: too small datatype for the number of concurrently processed cards, added concurrent remembered set thread time retrieval for Linux and Windows (BSD uses os::elapsedTime() now), and other cleanup. The information presented during VM operation is now relative to the previous output, not always cumulative if G1SummarizeRSetStatsPeriod > 0. At VM exit, the code prints a cumulative summary. Reviewed-by: johnc, jwilhelm

Merge

8015486: PSScavenge::is_obj_in_young is unnecessarily slow with UseCompressedOops Summary: Compare compressed oops to a compressed young gen boundary instead of uncompressing the oops before doing the young gen boundary check. Reviewed-by: brutisso, jmasa

6725714: par compact - add a table to speed up bitmap searches Reviewed-by: jmasa, tschatzl

8015690: new hotspot build - hs25-b36 Reviewed-by: jcoomes

Added tag hs25-b35 for changeset 02ffee063e24

Merge

Merge

8015422: Large performance hit when the StringTable is walked twice in Parallel Scavenge Summary: Combine the calls to StringTable::unlink and StringTable::oops_do in Parallel Scavenge. Reviewed-by: pliden, coleenp

8015428: Remove unused CDS support from StringTable Summary: The string in StringTable is not used by CDS anymore. Remove the unnecessary code in preparation for 8015422: Large performance hit when the StringTable is walked twice in Parallel Scavenge Reviewed-by: pliden, tschatzl, coleenp

8015268: NPG: 2.5% regression in young GC times on CRM Sales Opty Summary: Split SystemDictionary and ClassLoaderDataGraph root processing to help load balancing. Reviewed-by: tschatzl, johnc

Merge