Enable concurrent sweeping. Added some extra debugging checks for concurrent sweeping.
BUG= R=titzer@chromium.org Review URL: https://codereview.chromium.org/138903009 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18722 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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@ -529,8 +529,8 @@ DEFINE_bool(trace_incremental_marking, false,
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"trace progress of the incremental marking")
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DEFINE_bool(track_gc_object_stats, false,
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"track object counts and memory usage")
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DEFINE_bool(parallel_sweeping, true, "enable parallel sweeping")
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DEFINE_bool(concurrent_sweeping, false, "enable concurrent sweeping")
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DEFINE_bool(parallel_sweeping, false, "enable parallel sweeping")
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DEFINE_bool(concurrent_sweeping, true, "enable concurrent sweeping")
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DEFINE_int(sweeper_threads, 0,
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"number of parallel and concurrent sweeping threads")
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#ifdef VERIFY_HEAP
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@ -570,6 +570,11 @@ void MarkCompactCollector::ClearMarkbits() {
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void MarkCompactCollector::StartSweeperThreads() {
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// TODO(hpayer): This check is just used for debugging purpose and
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// should be removed or turned into an assert after investigating the
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// crash in concurrent sweeping.
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CHECK(free_list_old_pointer_space_.get()->IsEmpty());
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CHECK(free_list_old_data_space_.get()->IsEmpty());
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sweeping_pending_ = true;
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for (int i = 0; i < isolate()->num_sweeper_threads(); i++) {
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isolate()->sweeper_threads()[i]->StartSweeping();
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@ -3068,8 +3073,12 @@ void MarkCompactCollector::EvacuatePages() {
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int npages = evacuation_candidates_.length();
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for (int i = 0; i < npages; i++) {
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Page* p = evacuation_candidates_[i];
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ASSERT(p->IsEvacuationCandidate() ||
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p->IsFlagSet(Page::RESCAN_ON_EVACUATION));
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// TODO(hpayer): This check is just used for debugging purpose and
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// should be removed or turned into an assert after investigating the
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// crash in concurrent sweeping.
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CHECK(p->IsEvacuationCandidate() ||
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p->IsFlagSet(Page::RESCAN_ON_EVACUATION));
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CHECK_EQ(p->parallel_sweeping(), 0);
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if (p->IsEvacuationCandidate()) {
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// During compaction we might have to request a new page.
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// Check that space still have room for that.
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@ -3900,7 +3909,10 @@ template<MarkCompactCollector::SweepingParallelism mode>
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intptr_t MarkCompactCollector::SweepConservatively(PagedSpace* space,
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FreeList* free_list,
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Page* p) {
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ASSERT(!p->IsEvacuationCandidate() && !p->WasSwept());
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// TODO(hpayer): This check is just used for debugging purpose and
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// should be removed or turned into an assert after investigating the
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// crash in concurrent sweeping.
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CHECK(!p->IsEvacuationCandidate() && !p->WasSwept());
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ASSERT((mode == MarkCompactCollector::SWEEP_IN_PARALLEL &&
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free_list != NULL) ||
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(mode == MarkCompactCollector::SWEEP_SEQUENTIALLY &&
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@ -1142,6 +1142,11 @@ void PagedSpace::ReleasePage(Page* page, bool unlink) {
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DecreaseUnsweptFreeBytes(page);
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}
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// TODO(hpayer): This check is just used for debugging purpose and
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// should be removed or turned into an assert after investigating the
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// crash in concurrent sweeping.
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CHECK(!free_list_.ContainsPageFreeListItems(page));
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if (Page::FromAllocationTop(allocation_info_.top()) == page) {
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allocation_info_.set_top(NULL);
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allocation_info_.set_limit(NULL);
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@ -2125,6 +2130,16 @@ intptr_t FreeListCategory::EvictFreeListItemsInList(Page* p) {
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}
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bool FreeListCategory::ContainsPageFreeListItemsInList(Page* p) {
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FreeListNode** n = &top_;
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while (*n != NULL) {
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if (Page::FromAddress((*n)->address()) == p) return true;
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n = (*n)->next_address();
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}
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return false;
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}
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FreeListNode* FreeListCategory::PickNodeFromList(int *node_size) {
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FreeListNode* node = top_;
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@ -2452,6 +2467,14 @@ intptr_t FreeList::EvictFreeListItems(Page* p) {
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}
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bool FreeList::ContainsPageFreeListItems(Page* p) {
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return huge_list_.EvictFreeListItemsInList(p) ||
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small_list_.EvictFreeListItemsInList(p) ||
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medium_list_.EvictFreeListItemsInList(p) ||
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large_list_.EvictFreeListItemsInList(p);
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}
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void FreeList::RepairLists(Heap* heap) {
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small_list_.RepairFreeList(heap);
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medium_list_.RepairFreeList(heap);
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11
src/spaces.h
11
src/spaces.h
@ -1521,6 +1521,7 @@ class FreeListCategory {
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FreeListNode* PickNodeFromList(int size_in_bytes, int *node_size);
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intptr_t EvictFreeListItemsInList(Page* p);
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bool ContainsPageFreeListItemsInList(Page* p);
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void RepairFreeList(Heap* heap);
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@ -1538,6 +1539,10 @@ class FreeListCategory {
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Mutex* mutex() { return &mutex_; }
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bool IsEmpty() {
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return top_ == NULL;
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}
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#ifdef DEBUG
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intptr_t SumFreeList();
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int FreeListLength();
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@ -1605,6 +1610,11 @@ class FreeList {
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// 'wasted_bytes'. The size should be a non-zero multiple of the word size.
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MUST_USE_RESULT HeapObject* Allocate(int size_in_bytes);
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bool IsEmpty() {
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return small_list_.IsEmpty() && medium_list_.IsEmpty() &&
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large_list_.IsEmpty() && huge_list_.IsEmpty();
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}
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#ifdef DEBUG
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void Zap();
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intptr_t SumFreeLists();
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@ -1615,6 +1625,7 @@ class FreeList {
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void RepairLists(Heap* heap);
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intptr_t EvictFreeListItems(Page* p);
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bool ContainsPageFreeListItems(Page* p);
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FreeListCategory* small_list() { return &small_list_; }
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FreeListCategory* medium_list() { return &medium_list_; }
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