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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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8
hotspot/src/share/vm/gc_interface/collectedHeap.cpp
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@ -118,6 +118,14 @@ void CollectedHeap::print_heap_after_gc() {
}
}
void CollectedHeap::register_nmethod(nmethod* nm) {
assert_locked_or_safepoint(CodeCache_lock);
}
void CollectedHeap::unregister_nmethod(nmethod* nm) {
assert_locked_or_safepoint(CodeCache_lock);
}
void CollectedHeap::trace_heap(GCWhen::Type when, GCTracer* gc_tracer) {
const GCHeapSummary& heap_summary = create_heap_summary();
const MetaspaceSummary& metaspace_summary = create_metaspace_summary();