heap/EdenGCActivityCallback.cpp

   1 /*
   2  * Copyright (C) 2014 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "EdenGCActivityCallback.h"
  28
  29 #include "VM.h"
  30
  31 namespace JSC {
  32
  33 #if USE(CF) || PLATFORM(EFL)
  34
  35 EdenGCActivityCallback::EdenGCActivityCallback(Heap* heap)
  36     : GCActivityCallback(heap)
  37 {
  38 }
  39
  40 void EdenGCActivityCallback::doCollection()
  41 {
  42     m_vm->heap.collect(EdenCollection);
  43 }
  44
  45 double EdenGCActivityCallback::lastGCLength()
  46 {
  47     return m_vm->heap.lastEdenGCLength();
  48 }
  49
  50 double EdenGCActivityCallback::deathRate()
  51 {
  52     Heap* heap = &m_vm->heap;
  53     size_t sizeBefore = heap->sizeBeforeLastEdenCollection();
  54     size_t sizeAfter = heap->sizeAfterLastEdenCollection();
  55     if (!sizeBefore)
  56         return 1.0;
  57     return static_cast<double>(sizeBefore - sizeAfter) / static_cast<double>(sizeBefore);
  58 }
  59
  60 double EdenGCActivityCallback::gcTimeSlice(size_t bytes)
  61 {
  62     return std::min((static_cast<double>(bytes) / MB) * Options::percentCPUPerMBForEdenTimer(), Options::collectionTimerMaxPercentCPU());
  63 }
  64
  65 #else
  66
  67 EdenGCActivityCallback::EdenGCActivityCallback(Heap* heap)
  68     : GCActivityCallback(heap->vm())
  69 {
  70 }
  71
  72 void EdenGCActivityCallback::doCollection()
  73 {
  74 }
  75
  76 double EdenGCActivityCallback::lastGCLength()
  77 {
  78     return 0;
  79 }
  80
  81 double EdenGCActivityCallback::deathRate()
  82 {
  83     return 0;
  84 }
  85
  86 double EdenGCActivityCallback::gcTimeSlice(size_t)
  87 {
  88     return 0;
  89 }
  90
  91 #endif // USE(CF) || PLATFORM(EFL)
  92
  93 } // namespace JSC