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Issue 1303263002: Concurrently unmap free pages. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 4 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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/mark-compact.h" 5 #include "src/heap/mark-compact.h"
6 6
7 #include "src/base/atomicops.h" 7 #include "src/base/atomicops.h"
8 #include "src/base/bits.h" 8 #include "src/base/bits.h"
9 #include "src/code-stubs.h" 9 #include "src/code-stubs.h"
10 #include "src/compilation-cache.h" 10 #include "src/compilation-cache.h"
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512 void MarkCompactCollector::EnsureSweepingCompleted() { 512 void MarkCompactCollector::EnsureSweepingCompleted() {
513 DCHECK(sweeping_in_progress_ == true); 513 DCHECK(sweeping_in_progress_ == true);
514 514
515 // If sweeping is not completed or not running at all, we try to complete it 515 // If sweeping is not completed or not running at all, we try to complete it
516 // here. 516 // here.
517 if (!heap()->concurrent_sweeping_enabled() || !IsSweepingCompleted()) { 517 if (!heap()->concurrent_sweeping_enabled() || !IsSweepingCompleted()) {
518 SweepInParallel(heap()->paged_space(OLD_SPACE), 0); 518 SweepInParallel(heap()->paged_space(OLD_SPACE), 0);
519 SweepInParallel(heap()->paged_space(CODE_SPACE), 0); 519 SweepInParallel(heap()->paged_space(CODE_SPACE), 0);
520 SweepInParallel(heap()->paged_space(MAP_SPACE), 0); 520 SweepInParallel(heap()->paged_space(MAP_SPACE), 0);
521 } 521 }
522 // Wait twice for both jobs. 522
523 if (heap()->concurrent_sweeping_enabled()) { 523 if (heap()->concurrent_sweeping_enabled()) {
524 pending_sweeper_jobs_semaphore_.Wait(); 524 pending_sweeper_jobs_semaphore_.Wait();
525 pending_sweeper_jobs_semaphore_.Wait(); 525 pending_sweeper_jobs_semaphore_.Wait();
526 pending_sweeper_jobs_semaphore_.Wait(); 526 pending_sweeper_jobs_semaphore_.Wait();
527 } 527 }
528
529 heap()->WaitUntilUnmappingOfFreeChunksCompleted();
530
528 ParallelSweepSpacesComplete(); 531 ParallelSweepSpacesComplete();
529 sweeping_in_progress_ = false; 532 sweeping_in_progress_ = false;
530 RefillFreeList(heap()->paged_space(OLD_SPACE)); 533 RefillFreeList(heap()->paged_space(OLD_SPACE));
531 RefillFreeList(heap()->paged_space(CODE_SPACE)); 534 RefillFreeList(heap()->paged_space(CODE_SPACE));
532 RefillFreeList(heap()->paged_space(MAP_SPACE)); 535 RefillFreeList(heap()->paged_space(MAP_SPACE));
533 heap()->paged_space(OLD_SPACE)->ResetUnsweptFreeBytes(); 536 heap()->paged_space(OLD_SPACE)->ResetUnsweptFreeBytes();
534 heap()->paged_space(CODE_SPACE)->ResetUnsweptFreeBytes(); 537 heap()->paged_space(CODE_SPACE)->ResetUnsweptFreeBytes();
535 heap()->paged_space(MAP_SPACE)->ResetUnsweptFreeBytes(); 538 heap()->paged_space(MAP_SPACE)->ResetUnsweptFreeBytes();
536 539
537 #ifdef VERIFY_HEAP 540 #ifdef VERIFY_HEAP
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4693 SlotsBuffer* buffer = *buffer_address; 4696 SlotsBuffer* buffer = *buffer_address;
4694 while (buffer != NULL) { 4697 while (buffer != NULL) {
4695 SlotsBuffer* next_buffer = buffer->next(); 4698 SlotsBuffer* next_buffer = buffer->next();
4696 DeallocateBuffer(buffer); 4699 DeallocateBuffer(buffer);
4697 buffer = next_buffer; 4700 buffer = next_buffer;
4698 } 4701 }
4699 *buffer_address = NULL; 4702 *buffer_address = NULL;
4700 } 4703 }
4701 } // namespace internal 4704 } // namespace internal
4702 } // namespace v8 4705 } // namespace v8
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