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Issue 2379663002: Reland "[heap] New heuristics for starting of incremental marking. (patchset #9 id:160001 of https:… (Closed)
Patch Set: fix Created 4 years, 2 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "src/heap/spaces.h" 5 #include "src/heap/spaces.h"
6 6
7 #include <utility> 7 #include <utility>
8 8
9 #include "src/base/bits.h" 9 #include "src/base/bits.h"
10 #include "src/base/platform/platform.h" 10 #include "src/base/platform/platform.h"
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2882 // If sweeping is still in progress try to sweep pages on the main thread. 2882 // If sweeping is still in progress try to sweep pages on the main thread.
2883 int max_freed = collector->sweeper().ParallelSweepSpace( 2883 int max_freed = collector->sweeper().ParallelSweepSpace(
2884 identity(), size_in_bytes, kMaxPagesToSweep); 2884 identity(), size_in_bytes, kMaxPagesToSweep);
2885 RefillFreeList(); 2885 RefillFreeList();
2886 if (max_freed >= size_in_bytes) { 2886 if (max_freed >= size_in_bytes) {
2887 object = free_list_.Allocate(size_in_bytes); 2887 object = free_list_.Allocate(size_in_bytes);
2888 if (object != nullptr) return object; 2888 if (object != nullptr) return object;
2889 } 2889 }
2890 } 2890 }
2891 2891
2892 // Free list allocation failed and there is no next page. Fail if we have 2892 if (heap()->ShouldExpandOldGenerationOnAllocationFailure() && Expand()) {
2893 // hit the old generation size limit that should cause a garbage
2894 // collection.
2895 if (!heap()->always_allocate() &&
2896 heap()->OldGenerationAllocationLimitReached()) {
2897 // If sweeper threads are active, wait for them at that point and steal
2898 // elements form their free-lists.
2899 HeapObject* object = SweepAndRetryAllocation(size_in_bytes);
2900 return object;
2901 }
2902
2903 // Try to expand the space and allocate in the new next page.
2904 if (Expand()) {
2905 DCHECK((CountTotalPages() > 1) || 2893 DCHECK((CountTotalPages() > 1) ||
2906 (size_in_bytes <= free_list_.Available())); 2894 (size_in_bytes <= free_list_.Available()));
2907 return free_list_.Allocate(size_in_bytes); 2895 return free_list_.Allocate(size_in_bytes);
2908 } 2896 }
2909 2897
2910 // If sweeper threads are active, wait for them at that point and steal 2898 // If sweeper threads are active, wait for them at that point and steal
2911 // elements form their free-lists. Allocation may still fail their which 2899 // elements form their free-lists. Allocation may still fail their which
2912 // would indicate that there is not enough memory for the given allocation. 2900 // would indicate that there is not enough memory for the given allocation.
2913 return SweepAndRetryAllocation(size_in_bytes); 2901 return SweepAndRetryAllocation(size_in_bytes);
2914 } 2902 }
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3281 object->ShortPrint(); 3269 object->ShortPrint();
3282 PrintF("\n"); 3270 PrintF("\n");
3283 } 3271 }
3284 printf(" --------------------------------------\n"); 3272 printf(" --------------------------------------\n");
3285 printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes()); 3273 printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
3286 } 3274 }
3287 3275
3288 #endif // DEBUG 3276 #endif // DEBUG
3289 } // namespace internal 3277 } // namespace internal
3290 } // namespace v8 3278 } // namespace v8
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