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8180932: Parallelize safepoint cleanup

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Provide infrastructure to do safepoint cleanup tasks using parallel worker threads

Reviewed-by: dholmes, rehn, dcubed, thartmann
This commit is contained in:
Roman Kennke 2017-07-07 12:49:11 +02:00
parent d12604111c
commit 98bd53b5c2
12 changed files with 268 additions and 111 deletions
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6
hotspot/src/share/vm/code/nmethod.hpp
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@ -136,7 +136,7 @@ class nmethod : public CompiledMethod {
// stack. An not_entrant method can be removed when there are no
// more activations, i.e., when the _stack_traversal_mark is less than
// current sweep traversal index.
long _stack_traversal_mark;
volatile jlong _stack_traversal_mark;
// The _hotness_counter indicates the hotness of a method. The higher
// the value the hotter the method. The hotness counter of a nmethod is
@ -396,8 +396,8 @@ public:
public:
// Sweeper support
long stack_traversal_mark() { return _stack_traversal_mark; }
void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; }
jlong stack_traversal_mark() { return OrderAccess::load_acquire(&_stack_traversal_mark); }
void set_stack_traversal_mark(jlong l) { OrderAccess::release_store(&_stack_traversal_mark, l); }
// implicit exceptions support
address continuation_for_implicit_exception(address pc);