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8203469: Faster safepoints

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Reviewed-by: dcubed, pchilanomate, dholmes, acorn, coleenp, eosterlund
This commit is contained in:
Robbin Ehn 2019-02-15 14:15:10 +01:00
parent 66aa45649a
commit bec8431683
19 changed files with 647 additions and 712 deletions
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5
src/hotspot/share/runtime/mutex.hpp
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@ -56,10 +56,7 @@ class Monitor : public CHeapObj<mtInternal> {
// (except for "event" and "access") for the deadlock detection to work correctly.
// The rank native is only for use in Mutex's created by JVM_RawMonitorCreate,
// which being external to the VM are not subject to deadlock detection.
// The rank safepoint is used only for synchronization in reaching a
// safepoint and leaving a safepoint. It is only used for the Safepoint_lock
// currently. While at a safepoint no mutexes of rank safepoint are held
// by any thread.
// While at a safepoint no mutexes of rank safepoint are held by any thread.
// The rank named "leaf" is probably historical (and should
// be changed) -- mutexes of this rank aren't really leaf mutexes
// at all.