author | stuefe |
Tue, 10 Sep 2019 09:24:05 +0200 | |
branch | stuefe-new-metaspace-branch |
changeset 58063 | bdf136b8ae0e |
parent 53244 | 9807daeb47c4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#ifndef SHARE_JFR_RECORDER_STORAGE_JFRMEMORYSPACERETRIEVAL_HPP |
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#define SHARE_JFR_RECORDER_STORAGE_JFRMEMORYSPACERETRIEVAL_HPP |
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#include "memory/allocation.hpp" |
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#include "jfr/recorder/repository/jfrChunkWriter.hpp" |
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#include "jfr/recorder/storage/jfrBuffer.hpp" |
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#include "jfr/utilities/jfrAllocation.hpp" |
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#include "jfr/utilities/jfrTypes.hpp" |
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/* |
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* Some policy classes for getting mspace memory |
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*/ |
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template <typename Mspace> |
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class JfrMspaceRetrieval : AllStatic { |
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public: |
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typedef typename Mspace::Type Type; |
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static Type* get(size_t size, Mspace* mspace, typename Mspace::Iterator& iterator, Thread* thread) { |
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while (iterator.has_next()) { |
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Type* const t = iterator.next(); |
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if (t->retired()) continue; |
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if (t->try_acquire(thread)) { |
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assert(!t->retired(), "invariant"); |
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if (t->free_size() >= size) { |
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return t; |
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} |
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t->set_retired(); |
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mspace->register_full(t, thread); |
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} |
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} |
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return NULL; |
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} |
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}; |
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template <typename Mspace> |
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class JfrMspaceAlternatingRetrieval { |
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private: |
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// provides stochastic distribution over "deque" endpoints; racy is ok here |
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static bool _last_access; |
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public: |
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typedef typename Mspace::Type Type; |
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static Type* get(size_t size, Mspace* mspace, Thread* thread) { |
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typename Mspace::Iterator iterator(mspace->free(), (_last_access = !_last_access) ? forward : backward); |
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return JfrMspaceRetrieval<Mspace>::get(size, mspace, iterator, thread); |
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} |
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}; |
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template <typename Mspace> |
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bool JfrMspaceAlternatingRetrieval<Mspace>::_last_access = false; |
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template <typename Mspace> |
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class JfrMspaceSequentialRetrieval { |
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public: |
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typedef typename Mspace::Type Type; |
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static Type* get(size_t size, Mspace* mspace, Thread* thread) { |
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typename Mspace::Iterator iterator(mspace->free()); |
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return JfrMspaceRetrieval<Mspace>::get(size, mspace, iterator, thread); |
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} |
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}; |
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template <typename Mspace> |
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class JfrExclusiveRetrieval : AllStatic { |
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public: |
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typedef typename Mspace::Type Type; |
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static Type* get(size_t size, Mspace* mspace, typename Mspace::Iterator& iterator, Thread* thread) { |
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assert(mspace->is_locked(), "invariant"); |
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if (iterator.has_next()) { |
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Type* const t = iterator.next(); |
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assert(!t->retired(), "invariant"); |
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assert(t->identity() == NULL, "invariant"); |
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assert(t->free_size() >= size, "invariant"); |
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t->acquire(thread); |
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return t; |
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} |
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return NULL; |
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} |
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}; |
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template <typename Mspace> |
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class JfrThreadLocalRetrieval { |
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public: |
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typedef typename Mspace::Type Type; |
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static Type* get(size_t size, Mspace* mspace, Thread* thread) { |
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typename Mspace::Iterator iterator(mspace->free(), forward); |
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return JfrExclusiveRetrieval<Mspace>::get(size, mspace, iterator, thread); |
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} |
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}; |
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coleenp
parents:
50113
diff
changeset
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#endif // SHARE_JFR_RECORDER_STORAGE_JFRMEMORYSPACERETRIEVAL_HPP |