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8135152: Create a G1ParScanThreadStateSet class for managing G1 GC per thread states

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Reviewed-by: tschatzl, ehelin
This commit is contained in:
Mikael Gerdin 2015-09-09 10:34:22 +02:00
parent 802664728f
commit 2dbd4dd578
9 changed files with 127 additions and 61 deletions
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32
hotspot/src/share/vm/gc/g1/g1ParScanThreadState.hpp
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@ -121,6 +121,8 @@ class G1ParScanThreadState : public CHeapObj<mtGC> {
return _surviving_young_words + 1;
}
void flush();
private:
#define G1_PARTIAL_ARRAY_MASK 0x2
@ -189,4 +191,34 @@ class G1ParScanThreadState : public CHeapObj<mtGC> {
oop handle_evacuation_failure_par(oop obj, markOop m);
};
class G1ParScanThreadStateSet : public StackObj {
G1CollectedHeap* _g1h;
G1ParScanThreadState** _states;
uint _n_workers;
bool _flushed;
public:
G1ParScanThreadStateSet(G1CollectedHeap* g1h, uint n_workers) :
_g1h(g1h),
_states(NEW_C_HEAP_ARRAY(G1ParScanThreadState*, n_workers, mtGC)),
_n_workers(n_workers),
_flushed(false) {
for (uint i = 0; i < n_workers; ++i) {
_states[i] = new_par_scan_state(i);
}
}
~G1ParScanThreadStateSet() {
assert(_flushed, "thread local state from the per thread states should have been flushed");
FREE_C_HEAP_ARRAY(G1ParScanThreadState*, _states);
}
void flush();
G1ParScanThreadState* state_for_worker(uint worker_id);
private:
G1ParScanThreadState* new_par_scan_state(uint worker_id);
};
#endif // SHARE_VM_GC_G1_G1PARSCANTHREADSTATE_HPP