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8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40

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Reducing the number of calls to follow_class_loader to speed up the marking phase. Also removed some unnecessary calls to adjust_klass.

Reviewed-by: stefank, jmasa, mgerdin
This commit is contained in:
Stefan Johansson 2013-12-10 10:31:00 +01:00
parent 5d5b1157d1
commit 5f4d0e9c25
8 changed files with 25 additions and 54 deletions
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21
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp
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@ -2433,20 +2433,6 @@ void PSParallelCompact::marking_phase(ParCompactionManager* cm,
_gc_tracer.report_object_count_after_gc(is_alive_closure());
}
void PSParallelCompact::follow_klass(ParCompactionManager* cm, Klass* klass) {
ClassLoaderData* cld = klass->class_loader_data();
// The actual processing of the klass is done when we
// traverse the list of Klasses in the class loader data.
PSParallelCompact::follow_class_loader(cm, cld);
}
void PSParallelCompact::adjust_klass(ParCompactionManager* cm, Klass* klass) {
ClassLoaderData* cld = klass->class_loader_data();
// The actual processing of the klass is done when we
// traverse the list of Klasses in the class loader data.
PSParallelCompact::adjust_class_loader(cm, cld);
}
void PSParallelCompact::follow_class_loader(ParCompactionManager* cm,
ClassLoaderData* cld) {
PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
@ -2455,13 +2441,6 @@ void PSParallelCompact::follow_class_loader(ParCompactionManager* cm,
cld->oops_do(&mark_and_push_closure, &follow_klass_closure, true);
}
void PSParallelCompact::adjust_class_loader(ParCompactionManager* cm,
ClassLoaderData* cld) {
cld->oops_do(PSParallelCompact::adjust_pointer_closure(),
PSParallelCompact::adjust_klass_closure(),
true);
}
// This should be moved to the shared markSweep code!
class PSAlwaysTrueClosure: public BoolObjectClosure {
public: