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7143511: G1: Another instance of high GC Worker Other time (50ms)

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Tiered compilation has increased the number of nmethods in the code cache. This has, in turn, significantly increased the number of marked nmethods processed during the StrongRootsScope destructor. Create a specialized version of CodeBlobToOopClosure for G1 which places only those nmethods that contain pointers into the collection set on to the marked nmethods list.

Reviewed-by: iveresov, tonyp
This commit is contained in:
John Cuthbertson 2012-03-13 11:05:32 -07:00
parent a6d84bc811
commit 79c90a15fa
4 changed files with 175 additions and 79 deletions
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hotspot/src/share/vm/code/nmethod.hpp
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@ -553,7 +553,7 @@ public:
static void oops_do_marking_prologue();
static void oops_do_marking_epilogue();
static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; }
DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; })
bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }
// ScopeDesc for an instruction
ScopeDesc* scope_desc_at(address pc);