Mercurial > hg > truffle
diff src/share/vm/gc_implementation/parNew/parNewGeneration.hpp @ 534:5cfd8d19e546
6786503: Overflow list performance can be improved
Summary: Avoid overflow list walk in CMS & ParNew when it is unnecessary. Fix a couple of correctness issues, including a C-heap leak, in ParNew at the intersection of promotion failure, work queue overflow and object array chunking. Add stress testing option and related assertion checking.
Reviewed-by: jmasa
| author | ysr |
|---|---|
| date | Mon, 26 Jan 2009 12:47:21 -0800 |
| parents | d1605aabd0a1 |
| children | 0fbdb4381b99 |
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/parNew/parNewGeneration.hpp Wed Jan 21 13:40:10 2009 -0800 +++ b/src/share/vm/gc_implementation/parNew/parNewGeneration.hpp Mon Jan 26 12:47:21 2009 -0800 @@ -278,6 +278,7 @@ friend class ParNewRefProcTask; friend class ParNewRefProcTaskExecutor; friend class ParScanThreadStateSet; + friend class ParEvacuateFollowersClosure; private: // XXX use a global constant instead of 64! @@ -296,6 +297,7 @@ // klass-pointers (klass information already copied to the forwarded // image.) Manipulated with CAS. oop _overflow_list; + NOT_PRODUCT(ssize_t _num_par_pushes;) // If true, older generation does not support promotion undo, so avoid. static bool _avoid_promotion_undo; @@ -372,8 +374,12 @@ oop copy_to_survivor_space_with_undo(ParScanThreadState* par_scan_state, oop obj, size_t obj_sz, markOop m); + // in support of testing overflow code + NOT_PRODUCT(int _overflow_counter;) + NOT_PRODUCT(bool should_simulate_overflow();) + // Push the given (from-space) object on the global overflow list. - void push_on_overflow_list(oop from_space_obj); + void push_on_overflow_list(oop from_space_obj, ParScanThreadState* par_scan_state); // If the global overflow list is non-empty, move some tasks from it // onto "work_q" (which must be empty). No more than 1/4 of the