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7145569: G1: optimize nmethods scanning

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Add a list of nmethods to the RSet for a region that contain references into the region. Skip scanning the code cache during root scanning and scan the nmethod lists during RSet scanning instead.

Reviewed-by: tschatzl, brutisso, mgerdin, twisti, kvn
This commit is contained in:
John Cuthbertson 2013-08-15 10:52:18 +02:00
parent c144b8c30f
commit f63547bf71
22 changed files with 1256 additions and 476 deletions
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6
hotspot/src/share/vm/gc_interface/collectedHeap.hpp
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@ -49,6 +49,7 @@ class MetaspaceSummary;
class Thread;
class ThreadClosure;
class VirtualSpaceSummary;
class nmethod;
class GCMessage : public FormatBuffer<1024> {
public:
@ -603,6 +604,11 @@ class CollectedHeap : public CHeapObj<mtInternal> {
void print_heap_before_gc();
void print_heap_after_gc();
// Registering and unregistering an nmethod (compiled code) with the heap.
// Override with specific mechanism for each specialized heap type.
virtual void register_nmethod(nmethod* nm);
virtual void unregister_nmethod(nmethod* nm);
void trace_heap_before_gc(GCTracer* gc_tracer);
void trace_heap_after_gc(GCTracer* gc_tracer);