jdk8-mips64-public/hotspot: src/share/vm/jfr/support/jfrFlush.hpp@8e875c964f41 (annotated)

src/share/vm/jfr/support/jfrFlush.hpp@8e875c964f41 (annotated)

src/share/vm/jfr/support/jfrFlush.hpp

Wed, 09 Oct 2019 16:11:58 +0800

author: ddong
date: Wed, 09 Oct 2019 16:11:58 +0800
changeset 9885: 8e875c964f41
parent 9858: b985cbb00e68
permissions: -rw-r--r--

8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
Reviewed-by: egahlin, rwestberg

 /*
  * Copyright (c) 2016, 2018, 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_JFR_SUPPORT_JFRFLUSH_HPP
 #define SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
 #include "jfr/recorder/storage/jfrBuffer.hpp"
 #include "jfr/utilities/jfrTypes.hpp"
 #include "memory/allocation.hpp"
 class Thread;
 class JfrFlush : public StackObj {
  public:
   typedef JfrBuffer Type;
   JfrFlush(Type* old, size_t used, size_t requested, Thread* t);
   Type* result() const { return _result; }
  private:
   Type* _result;
 };
 void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t);
 bool jfr_is_event_enabled(JfrEventId id);
 bool jfr_has_stacktrace_enabled(JfrEventId id);
 bool jfr_save_stacktrace(Thread* t);
 void jfr_clear_stacktrace(Thread* t);
 template <typename Event>
 class JfrConditionalFlush {
  protected:
   bool _enabled;
  public:
   typedef JfrBuffer Type;
   JfrConditionalFlush(Thread* t) : _enabled(jfr_is_event_enabled(Event::eventId)) {
     if (_enabled) {
       jfr_conditional_flush(Event::eventId, sizeof(Event), t);
     }
   }
 };
 template <typename Event>
 class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> {
   Thread* _t;
   bool _owner;
  public:
   JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) {
     if (this->_enabled && Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) {
       _owner = jfr_save_stacktrace(t);
     }
   }
   ~JfrConditionalFlushWithStacktrace() {
     if (_owner) {
       jfr_clear_stacktrace(_t);
     }
   }
 };
 #endif // SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/jfr/support/jfrFlush.hpp@8e875c964f41 (annotated)

src/share/vm/jfr/support/jfrFlush.hpp