Mercurial > hg > truffle
diff src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp @ 6253:db823a892a55
7182260: G1: Fine grain RSet freeing bottleneck
Summary: Chain the fine grain PerRegionTables in an individual RSet together and free them in bulk using a single operation.
Reviewed-by: johnc, brutisso
Contributed-by: Thomas Schatzl <thomas.schatzl@jku.at>
| author | johnc |
|---|---|
| date | Tue, 17 Jul 2012 12:24:05 -0700 |
| parents | 24b9c7f4cae6 |
| children | 5c93c1f61226 |
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--- a/src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp Tue Jul 17 14:57:02 2012 -0700 +++ b/src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp Tue Jul 17 12:24:05 2012 -0700 @@ -82,6 +82,14 @@ PerRegionTable** _fine_grain_regions; size_t _n_fine_entries; + // The fine grain remembered sets are doubly linked together using + // their 'next' and 'prev' fields. + // This allows fast bulk freeing of all the fine grain remembered + // set entries, and fast finding of all of them without iterating + // over the _fine_grain_regions table. + PerRegionTable * _first_all_fine_prts; + PerRegionTable * _last_all_fine_prts; + // Used to sample a subset of the fine grain PRTs to determine which // PRT to evict and coarsen. size_t _fine_eviction_start; @@ -114,6 +122,11 @@ static size_t _from_card_cache_max_regions; static size_t _from_card_cache_mem_size; + // link/add the given fine grain remembered set into the "all" list + void link_to_all(PerRegionTable * prt); + // unlink/remove the given fine grain remembered set into the "all" list + void unlink_from_all(PerRegionTable * prt); + public: OtherRegionsTable(HeapRegion* hr);