Mercurial > hg > graal-compiler
diff src/share/vm/runtime/thread.cpp @ 3769:ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
Summary: It turns out that there is no need to explicitly stop CMS since the JVM is taken down at a terminal safepoint during which CMS threads are (terminally) inactive. This will need to be revised if and when we evolve in the future to a point where we allow JVM reincarnation in the same process, but those changes will be much more sweeping than just terminating CMS threads. The unused ::stop() methods will be removed in a separate CR. Also include in this CR is the fix for a small typo in the spelling of UseGCLogFileRotation in a message in arguments.cpp, brought to our attention by Rainer Jung and reviewed by minqi.
Reviewed-by: johnc, jwilhelm
author | ysr |
---|---|
date | Mon, 13 Jun 2011 09:58:16 -0700 |
parents | a80577f854f9 |
children | 48048b59a551 |
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--- a/src/share/vm/runtime/thread.cpp Fri Jun 10 15:44:02 2011 -0700 +++ b/src/share/vm/runtime/thread.cpp Mon Jun 13 09:58:16 2011 -0700 @@ -3698,6 +3698,14 @@ // heap is unparseable if they are caught. Grab the Heap_lock // to prevent this. The GC vm_operations will not be able to // queue until after the vm thread is dead. + // After this point, we'll never emerge out of the safepoint before + // the VM exits, so concurrent GC threads do not need to be explicitly + // stopped; they remain inactive until the process exits. + // Note: some concurrent G1 threads may be running during a safepoint, + // but these will not be accessing the heap, just some G1-specific side + // data structures that are not accessed by any other threads but them + // after this point in a terminal safepoint. + MutexLocker ml(Heap_lock); VMThread::wait_for_vm_thread_exit();