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8150721: Don't explicitly manage G1 young regions in YoungList

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Reviewed-by: ehelin, sjohanss, tschatzl
This commit is contained in:
Mikael Gerdin 2016-05-03 12:33:10 +02:00
parent 0adae4d914
commit 462ad706f1
17 changed files with 181 additions and 322 deletions
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22
hotspot/src/share/vm/gc/g1/g1CollectionSet.cpp
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@ -274,10 +274,9 @@ void G1CollectionSet::print(HeapRegion* list_head, outputStream* st) {
}
#endif // !PRODUCT
double G1CollectionSet::finalize_young_part(double target_pause_time_ms) {
double G1CollectionSet::finalize_young_part(double target_pause_time_ms, G1SurvivorRegions* survivors) {
double young_start_time_sec = os::elapsedTime();
YoungList* young_list = _g1->young_list();
finalize_incremental_building();
guarantee(target_pause_time_ms > 0.0,
@ -297,27 +296,14 @@ double G1CollectionSet::finalize_young_part(double target_pause_time_ms) {
// pause are appended to the RHS of the young list, i.e.
// [Newly Young Regions ++ Survivors from last pause].
uint survivor_region_length = young_list->survivor_length();
uint eden_region_length = young_list->eden_length();
uint survivor_region_length = survivors->length();
uint eden_region_length = _g1->eden_regions_count();
init_region_lengths(eden_region_length, survivor_region_length);
const GrowableArray<HeapRegion*>* survivor_regions = _g1->young_list()->survivor_regions();
for (GrowableArrayIterator<HeapRegion*> it = survivor_regions->begin();
it != survivor_regions->end();
++it) {
HeapRegion* hr = *it;
assert(hr->is_survivor(), "badly formed young list");
// There is a convention that all the young regions in the CSet
// are tagged as "eden", so we do this for the survivors here. We
// use the special set_eden_pre_gc() as it doesn't check that the
// region is free (which is not the case here).
hr->set_eden_pre_gc();
}
verify_young_cset_indices();
// Clear the fields that point to the survivor list - they are all young now.
young_list->clear_survivors();
survivors->convert_to_eden();
_head = _inc_head;
_bytes_used_before = _inc_bytes_used_before;