Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp @ 2188:c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
7007446: G1: expand the heap with a single step, not one region at a time
Summary: Changed G1CollectedHeap::expand() to expand the committed space by calling VirtualSpace::expand_by() once rather than for every region in the expansion amount. This allows the success or failure of the expansion to be determined before creating any heap regions. Introduced a develop flag G1ExitOnExpansionFailure (false by default) that, when true, will exit the VM if the expansion of the committed space fails. Finally G1CollectedHeap::expand() returns a status back to it's caller so that the caller knows whether to attempt the allocation.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Wed, 02 Feb 2011 10:41:20 -0800 |
parents | f95d63e2154a |
children | 8847586c9037 |
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/* * Copyright (c) 2001, 2010, 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 * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP #include "gc_implementation/shared/concurrentGCThread.hpp" // Forward Decl. class ConcurrentG1Refine; // The G1 Concurrent Refinement Thread (could be several in the future). class ConcurrentG1RefineThread: public ConcurrentGCThread { friend class VMStructs; friend class G1CollectedHeap; double _vtime_start; // Initial virtual time. double _vtime_accum; // Initial virtual time. int _worker_id; int _worker_id_offset; // The refinement threads collection is linked list. A predecessor can activate a successor // when the number of the rset update buffer crosses a certain threshold. A successor // would self-deactivate when the number of the buffers falls below the threshold. bool _active; ConcurrentG1RefineThread* _next; Monitor* _monitor; ConcurrentG1Refine* _cg1r; int _thread_threshold_step; // This thread activation threshold int _threshold; // This thread deactivation threshold int _deactivation_threshold; void sample_young_list_rs_lengths(); void run_young_rs_sampling(); void wait_for_completed_buffers(); void set_active(bool x) { _active = x; } bool is_active(); void activate(); void deactivate(); // For use by G1CollectedHeap, which is a friend. static SuspendibleThreadSet* sts() { return &_sts; } public: virtual void run(); // Constructor ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next, int worker_id_offset, int worker_id); void initialize(); // Printing void print() const; void print_on(outputStream* st) const; // Total virtual time so far. double vtime_accum() { return _vtime_accum; } ConcurrentG1Refine* cg1r() { return _cg1r; } // Yield for GC void yield(); // shutdown void stop(); }; #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP