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src/hotspot/share/gc/g1/g1MMUTracker.cpp

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   1 /*
   2  * Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   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
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/g1/g1MMUTracker.hpp"
  27 #include "gc/g1/g1Trace.hpp"
  28 #include "logging/log.hpp"
  29 #include "runtime/mutexLocker.hpp"
  30 #include "utilities/ostream.hpp"
  31 
  32 // can't rely on comparing doubles with tolerating a small margin for error
  33 #define SMALL_MARGIN 0.0000001
  34 #define is_double_leq_0(_value) ( (_value) < SMALL_MARGIN )
  35 #define is_double_leq(_val1, _val2) is_double_leq_0((_val1) - (_val2))
  36 #define is_double_geq(_val1, _val2) is_double_leq_0((_val2) - (_val1))
  37 
  38 /***** ALL TIMES ARE IN SECS!!!!!!! *****/
  39 
  40 G1MMUTracker::G1MMUTracker(double time_slice, double max_gc_time) :
  41   _time_slice(time_slice),
  42   _max_gc_time(max_gc_time) { }
  43 
  44 G1MMUTrackerQueue::G1MMUTrackerQueue(double time_slice, double max_gc_time) :
  45   G1MMUTracker(time_slice, max_gc_time),
  46   _head_index(0),
  47   _tail_index(trim_index(_head_index+1)),


   1 /*
   2  * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   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
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/g1/g1MMUTracker.hpp"
  27 #include "gc/shared/gcTrace.hpp"
  28 #include "logging/log.hpp"
  29 #include "runtime/mutexLocker.hpp"
  30 #include "utilities/ostream.hpp"
  31 
  32 // can't rely on comparing doubles with tolerating a small margin for error
  33 #define SMALL_MARGIN 0.0000001
  34 #define is_double_leq_0(_value) ( (_value) < SMALL_MARGIN )
  35 #define is_double_leq(_val1, _val2) is_double_leq_0((_val1) - (_val2))
  36 #define is_double_geq(_val1, _val2) is_double_leq_0((_val2) - (_val1))
  37 
  38 /***** ALL TIMES ARE IN SECS!!!!!!! *****/
  39 
  40 G1MMUTracker::G1MMUTracker(double time_slice, double max_gc_time) :
  41   _time_slice(time_slice),
  42   _max_gc_time(max_gc_time) { }
  43 
  44 G1MMUTrackerQueue::G1MMUTrackerQueue(double time_slice, double max_gc_time) :
  45   G1MMUTracker(time_slice, max_gc_time),
  46   _head_index(0),
  47   _tail_index(trim_index(_head_index+1)),


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