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8038423: G1: Decommit memory within heap

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Allow G1 to decommit memory of arbitrary regions within the heap and their associated auxiliary data structures card table, BOT, hot card cache, and mark bitmaps.

Reviewed-by: mgerdin, brutisso, jwilhelm
This commit is contained in:
Thomas Schatzl 2014-08-19 14:09:10 +02:00
parent 2617d54723
commit 100e51a339
32 changed files with 1322 additions and 579 deletions
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9
hotspot/src/share/vm/gc_implementation/g1/g1HotCardCache.cpp
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@ -33,7 +33,7 @@
G1HotCardCache::G1HotCardCache(G1CollectedHeap *g1h):
_g1h(g1h), _hot_cache(NULL), _use_cache(false), _card_counts(g1h) {}
void G1HotCardCache::initialize() {
void G1HotCardCache::initialize(G1RegionToSpaceMapper* card_counts_storage) {
if (default_use_cache()) {
_use_cache = true;
@ -49,7 +49,7 @@ void G1HotCardCache::initialize() {
_hot_cache_par_chunk_size = MAX2(1, _hot_cache_size / (int)n_workers);
_hot_cache_par_claimed_idx = 0;
_card_counts.initialize();
_card_counts.initialize(card_counts_storage);
}
}
@ -135,11 +135,8 @@ void G1HotCardCache::drain(uint worker_i,
// above, are discarded prior to re-enabling the cache near the end of the GC.
}
void G1HotCardCache::resize_card_counts(size_t heap_capacity) {
_card_counts.resize(heap_capacity);
}
void G1HotCardCache::reset_card_counts(HeapRegion* hr) {
assert(!hr->isHumongous(), "Should have been cleared");
_card_counts.clear_region(hr);
}