mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-07 17:31:46 +00:00
69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
/*
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* Copyright (C) 2014-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "EdenGCActivityCallback.h"
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#include "VM.h"
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namespace JSC {
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EdenGCActivityCallback::EdenGCActivityCallback(Heap* heap)
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: GCActivityCallback(heap)
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{
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}
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void EdenGCActivityCallback::doCollection(VM& vm)
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{
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vm.heap.collectAsync(CollectionScope::Eden);
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}
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Seconds EdenGCActivityCallback::lastGCLength(Heap& heap)
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{
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return heap.lastEdenGCLength();
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}
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double EdenGCActivityCallback::deathRate(Heap& heap)
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{
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size_t sizeBefore = heap.sizeBeforeLastEdenCollection();
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size_t sizeAfter = heap.sizeAfterLastEdenCollection();
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if (!sizeBefore)
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return 1.0;
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if (sizeAfter > sizeBefore) {
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// GC caused the heap to grow(!)
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// This could happen if the we visited more extra memory than was reported allocated.
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// We don't return a negative death rate, since that would schedule the next GC in the past.
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return 0;
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}
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return static_cast<double>(sizeBefore - sizeAfter) / static_cast<double>(sizeBefore);
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}
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double EdenGCActivityCallback::gcTimeSlice(size_t bytes)
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{
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return std::min((static_cast<double>(bytes) / MB) * Options::percentCPUPerMBForEdenTimer(), Options::collectionTimerMaxPercentCPU());
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}
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} // namespace JSC
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