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8035406: Improve data structure for Code Cache remembered sets

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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
This commit is contained in:
Thomas Schatzl 2014-03-17 10:12:21 +01:00
parent c88e3def4d
commit 329e55e7b0
14 changed files with 656 additions and 69 deletions
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6
hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -285,6 +285,10 @@
product(uintx, G1MixedGCCountTarget, 8, \
"The target number of mixed GCs after a marking cycle.") \
\
experimental(uintx, G1CodeRootsChunkCacheKeepPercent, 10, \
"The amount of code root chunks that should be kept at most " \
"as percentage of already allocated.") \
\
experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
"An upper bound for the number of old CSet regions expressed " \
"as a percentage of the heap size.") \