Mercurial > hg > graal-compiler
diff src/share/vm/gc_implementation/g1/ptrQueue.hpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
| author | tonyp |
|---|---|
| date | Wed, 19 Jan 2011 09:35:17 -0500 |
| parents | f95d63e2154a |
| children | 2ace1c4ee8da |
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--- a/src/share/vm/gc_implementation/g1/ptrQueue.hpp Thu Jan 13 17:19:21 2011 -0800 +++ b/src/share/vm/gc_implementation/g1/ptrQueue.hpp Wed Jan 19 09:35:17 2011 -0500 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -68,7 +68,7 @@ public: // Initialize this queue to contain a null buffer, and be part of the // given PtrQueueSet. - PtrQueue(PtrQueueSet*, bool perm = false, bool active = false); + PtrQueue(PtrQueueSet* qset, bool perm = false, bool active = false); // Release any contained resources. void flush(); // Calls flush() when destroyed. @@ -85,6 +85,14 @@ else enqueue_known_active(ptr); } + // This method is called when we're doing the zero index handling + // and gives a chance to the queues to do any pre-enqueueing + // processing they might want to do on the buffer. It should return + // true if the buffer should be enqueued, or false if enough + // entries were cleared from it so that it can be re-used. It should + // not return false if the buffer is still full (otherwise we can + // get into an infinite loop). + virtual bool should_enqueue_buffer() { return true; } void handle_zero_index(); void locking_enqueue_completed_buffer(void** buf);