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8027959: Early reclamation of large objects in G1

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Try to reclaim humongous objects at every young collection after doing a conservative estimate of its liveness.

Reviewed-by: brutisso, mgerdin
This commit is contained in:
Thomas Schatzl 2014-07-23 09:03:32 +02:00
parent bc56e061ec
commit f161bd6d16
12 changed files with 537 additions and 32 deletions
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7
hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp
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@ -289,6 +289,13 @@
"The amount of code root chunks that should be kept at most " \
"as percentage of already allocated.") \
\
experimental(bool, G1ReclaimDeadHumongousObjectsAtYoungGC, true, \
"Try to reclaim dead large objects at every young GC.") \
\
experimental(bool, G1TraceReclaimDeadHumongousObjectsAtYoungGC, false, \
"Print some information about large object liveness " \
"at every young GC.") \
\
experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
"An upper bound for the number of old CSet regions expressed " \
"as a percentage of the heap size.") \