Mercurial > hg > truffle

comparison src/share/vm/gc_implementation/g1/satbQueue.hpp @ 2149:7e37af9d69ef

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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
comparison
equal deleted inserted replaced
2137:ffd725ff6943 2149:7e37af9d69ef
1 /* 1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
31 class JavaThread; 31 class JavaThread;
32 32
33 // A ptrQueue whose elements are "oops", pointers to object heads. 33 // A ptrQueue whose elements are "oops", pointers to object heads.
34 class ObjPtrQueue: public PtrQueue { 34 class ObjPtrQueue: public PtrQueue {
35 public: 35 public:
36 ObjPtrQueue(PtrQueueSet* qset_, bool perm = false) : 36 ObjPtrQueue(PtrQueueSet* qset, bool perm = false) :
37 // SATB queues are only active during marking cycles. We create 37 // SATB queues are only active during marking cycles. We create
38 // them with their active field set to false. If a thread is 38 // them with their active field set to false. If a thread is
39 // created during a cycle and its SATB queue needs to be activated 39 // created during a cycle and its SATB queue needs to be activated
40 // before the thread starts running, we'll need to set its active 40 // before the thread starts running, we'll need to set its active
41 // field to true. This is done in JavaThread::initialize_queues(). 41 // field to true. This is done in JavaThread::initialize_queues().
42 PtrQueue(qset_, perm, false /* active */) { } 42 PtrQueue(qset, perm, false /* active */) { }
43
44 // Overrides PtrQueue::should_enqueue_buffer(). See the method's
45 // definition for more information.
46 virtual bool should_enqueue_buffer();
47
43 // Apply the closure to all elements, and reset the index to make the 48 // Apply the closure to all elements, and reset the index to make the
44 // buffer empty. 49 // buffer empty.
45 void apply_closure(ObjectClosure* cl); 50 void apply_closure(ObjectClosure* cl);
46 51
47 // Apply the closure to all elements of "buf", down to "index" (inclusive.) 52 // Apply the closure to all elements of "buf", down to "index" (inclusive.)