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6631166: CMS: better heuristics when combatting fragmentation

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Autonomic per-worker free block cache sizing, tunable coalition policies, fixes to per-size block statistics, retuned gain and bandwidth of some feedback loop filters to allow quicker reactivity to abrupt changes in ambient demand, and other heuristics to reduce fragmentation of the CMS old gen. Also tightened some assertions, including those related to locking.

Reviewed-by: jmasa
This commit is contained in:
Y. Srinivas Ramakrishna 2009-12-23 09:23:54 -08:00
parent 1383dc414b
commit 272a6d47bb
26 changed files with 1099 additions and 345 deletions
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5
hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp
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@ -67,3 +67,8 @@ void FreeChunk::verifyList() const {
}
}
#endif
void FreeChunk::print_on(outputStream* st) {
st->print_cr("Next: " PTR_FORMAT " Prev: " PTR_FORMAT " %s",
next(), prev(), cantCoalesce() ? "[can't coalesce]" : "");
}