| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright 2014 the V8 project authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "src/compiler/zone-pool.h" | |
| 6 | |
| 7 namespace v8 { | |
| 8 namespace internal { | |
| 9 namespace compiler { | |
| 10 | |
| 11 ZonePool::StatsScope::StatsScope(ZonePool* zone_pool) | |
| 12 : zone_pool_(zone_pool), | |
| 13 total_allocated_bytes_at_start_(zone_pool->GetTotalAllocatedBytes()), | |
| 14 max_allocated_bytes_(0) { | |
| 15 zone_pool_->stats_.push_back(this); | |
| 16 for (Zone* zone : zone_pool_->used_) { | |
| 17 size_t size = static_cast<size_t>(zone->allocation_size()); | |
| 18 std::pair<InitialValues::iterator, bool> res = | |
| 19 initial_values_.insert(std::make_pair(zone, size)); | |
| 20 USE(res); | |
| 21 DCHECK(res.second); | |
| 22 } | |
| 23 } | |
| 24 | |
| 25 | |
| 26 ZonePool::StatsScope::~StatsScope() { | |
| 27 DCHECK_EQ(zone_pool_->stats_.back(), this); | |
| 28 zone_pool_->stats_.pop_back(); | |
| 29 } | |
| 30 | |
| 31 | |
| 32 size_t ZonePool::StatsScope::GetMaxAllocatedBytes() { | |
| 33 return std::max(max_allocated_bytes_, GetCurrentAllocatedBytes()); | |
| 34 } | |
| 35 | |
| 36 | |
| 37 size_t ZonePool::StatsScope::GetCurrentAllocatedBytes() { | |
| 38 size_t total = 0; | |
| 39 for (Zone* zone : zone_pool_->used_) { | |
| 40 total += static_cast<size_t>(zone->allocation_size()); | |
| 41 // Adjust for initial values. | |
| 42 InitialValues::iterator it = initial_values_.find(zone); | |
| 43 if (it != initial_values_.end()) { | |
| 44 total -= it->second; | |
| 45 } | |
| 46 } | |
| 47 return total; | |
| 48 } | |
| 49 | |
| 50 | |
| 51 size_t ZonePool::StatsScope::GetTotalAllocatedBytes() { | |
| 52 return zone_pool_->GetTotalAllocatedBytes() - total_allocated_bytes_at_start_; | |
| 53 } | |
| 54 | |
| 55 | |
| 56 void ZonePool::StatsScope::ZoneReturned(Zone* zone) { | |
| 57 size_t current_total = GetCurrentAllocatedBytes(); | |
| 58 // Update max. | |
| 59 max_allocated_bytes_ = std::max(max_allocated_bytes_, current_total); | |
| 60 // Drop zone from initial value map. | |
| 61 InitialValues::iterator it = initial_values_.find(zone); | |
| 62 if (it != initial_values_.end()) { | |
| 63 initial_values_.erase(it); | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 ZonePool::ZonePool(AccountingAllocator* allocator) | |
| 68 : max_allocated_bytes_(0), total_deleted_bytes_(0), allocator_(allocator) {} | |
| 69 | |
| 70 ZonePool::~ZonePool() { | |
| 71 DCHECK(used_.empty()); | |
| 72 DCHECK(stats_.empty()); | |
| 73 for (Zone* zone : unused_) { | |
| 74 delete zone; | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 | |
| 79 size_t ZonePool::GetMaxAllocatedBytes() { | |
| 80 return std::max(max_allocated_bytes_, GetCurrentAllocatedBytes()); | |
| 81 } | |
| 82 | |
| 83 | |
| 84 size_t ZonePool::GetCurrentAllocatedBytes() { | |
| 85 size_t total = 0; | |
| 86 for (Zone* zone : used_) { | |
| 87 total += static_cast<size_t>(zone->allocation_size()); | |
| 88 } | |
| 89 return total; | |
| 90 } | |
| 91 | |
| 92 | |
| 93 size_t ZonePool::GetTotalAllocatedBytes() { | |
| 94 return total_deleted_bytes_ + GetCurrentAllocatedBytes(); | |
| 95 } | |
| 96 | |
| 97 | |
| 98 Zone* ZonePool::NewEmptyZone() { | |
| 99 Zone* zone; | |
| 100 // Grab a zone from pool if possible. | |
| 101 if (!unused_.empty()) { | |
| 102 zone = unused_.back(); | |
| 103 unused_.pop_back(); | |
| 104 } else { | |
| 105 zone = new Zone(allocator_); | |
| 106 } | |
| 107 used_.push_back(zone); | |
| 108 DCHECK_EQ(0u, zone->allocation_size()); | |
| 109 return zone; | |
| 110 } | |
| 111 | |
| 112 | |
| 113 void ZonePool::ReturnZone(Zone* zone) { | |
| 114 size_t current_total = GetCurrentAllocatedBytes(); | |
| 115 // Update max. | |
| 116 max_allocated_bytes_ = std::max(max_allocated_bytes_, current_total); | |
| 117 // Update stats. | |
| 118 for (StatsScope* stat_scope : stats_) { | |
| 119 stat_scope->ZoneReturned(zone); | |
| 120 } | |
| 121 // Remove from used. | |
| 122 Used::iterator it = std::find(used_.begin(), used_.end(), zone); | |
| 123 DCHECK(it != used_.end()); | |
| 124 used_.erase(it); | |
| 125 total_deleted_bytes_ += static_cast<size_t>(zone->allocation_size()); | |
| 126 // Delete zone or clear and stash on unused_. | |
| 127 if (unused_.size() >= kMaxUnusedSize) { | |
| 128 delete zone; | |
| 129 } else { | |
| 130 zone->DeleteAll(); | |
| 131 DCHECK_EQ(0u, zone->allocation_size()); | |
| 132 unused_.push_back(zone); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 } // namespace compiler | |
| 137 } // namespace internal | |
| 138 } // namespace v8 | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2348303002:
Replaced different means of zone pooling/reusing by one zone segment pool (Closed)
