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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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24
hotspot/src/share/vm/gc_implementation/g1/heapRegionRemSet.cpp
View file

@ -373,17 +373,17 @@ void FromCardCache::initialize(uint n_par_rs, uint max_num_regions) {
_max_regions,
&_static_mem_size);
for (uint i = 0; i < n_par_rs; i++) {
for (uint j = 0; j < _max_regions; j++) {
set(i, j, InvalidCard);
}
}
invalidate(0, _max_regions);
}
void FromCardCache::shrink(uint new_num_regions) {
void FromCardCache::invalidate(uint start_idx, size_t new_num_regions) {
guarantee((size_t)start_idx + new_num_regions <= max_uintx,
err_msg("Trying to invalidate beyond maximum region, from %u size "SIZE_FORMAT,
start_idx, new_num_regions));
for (uint i = 0; i < HeapRegionRemSet::num_par_rem_sets(); i++) {
assert(new_num_regions <= _max_regions, "Must be within max.");
for (uint j = new_num_regions; j < _max_regions; j++) {
uint end_idx = (start_idx + (uint)new_num_regions);
assert(end_idx <= _max_regions, "Must be within max.");
for (uint j = start_idx; j < end_idx; j++) {
set(i, j, InvalidCard);
}
}
@ -407,12 +407,12 @@ void FromCardCache::clear(uint region_idx) {
}
}
void OtherRegionsTable::init_from_card_cache(uint max_regions) {
void OtherRegionsTable::initialize(uint max_regions) {
FromCardCache::initialize(HeapRegionRemSet::num_par_rem_sets(), max_regions);
}
void OtherRegionsTable::shrink_from_card_cache(uint new_num_regions) {
FromCardCache::shrink(new_num_regions);
void OtherRegionsTable::invalidate(uint start_idx, size_t num_regions) {
FromCardCache::invalidate(start_idx, num_regions);
}
void OtherRegionsTable::print_from_card_cache() {
@ -841,7 +841,7 @@ HeapRegionRemSet::HeapRegionRemSet(G1BlockOffsetSharedArray* bosa,
HeapRegion* hr)
: _bosa(bosa),
_m(Mutex::leaf, FormatBuffer<128>("HeapRegionRemSet lock #%u", hr->hrs_index()), true),
_code_roots(), _other_regions(hr, &_m) {
_code_roots(), _other_regions(hr, &_m), _iter_state(Unclaimed), _iter_claimed(0) {
reset_for_par_iteration();
}