archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-21 11:34:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

6923991: G1: improve scalability of RSet scanning

Browse source 
Implemented block-based work stealing. Moved copying during the rset scanning phase to the main copying phase. Made the size of rset table depend on the region size.

Reviewed-by: apetrusenko, tonyp
This commit is contained in:
Igor Veresov 2010-02-11 15:52:19 -08:00
parent 0356567ed8
commit 52b92d5593
14 changed files with 263 additions and 168 deletions
Download patch file Download diff file Expand all files Collapse all files

17
hotspot/src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp
View file

@ -187,7 +187,8 @@ private:
void clear_outgoing_entries();
enum ParIterState { Unclaimed, Claimed, Complete };
ParIterState _iter_state;
volatile ParIterState _iter_state;
volatile jlong _iter_claimed;
// Unused unless G1RecordHRRSOops is true.
@ -209,6 +210,7 @@ public:
HeapRegion* hr);
static int num_par_rem_sets();
static void setup_remset_size();
HeapRegion* hr() const {
return _other_regions.hr();
@ -272,6 +274,19 @@ public:
// Returns "true" iff the region's iteration is complete.
bool iter_is_complete();
// Support for claiming blocks of cards during iteration
void set_iter_claimed(size_t x) { _iter_claimed = (jlong)x; }
size_t iter_claimed() const { return (size_t)_iter_claimed; }
// Claim the next block of cards
size_t iter_claimed_next(size_t step) {
size_t current, next;
do {
current = iter_claimed();
next = current + step;
} while (Atomic::cmpxchg((jlong)next, &_iter_claimed, (jlong)current) != (jlong)current);
return current;
}
// Initialize the given iterator to iterate over this rem set.
void init_iterator(HeapRegionRemSetIterator* iter) const;