blob: a731e37be0605cbe1bba5684336e5393e90ed278 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/heap/scavenge-job.h"
#include "src/base/platform/time.h"
#include "src/execution/isolate.h"
#include "src/execution/vm-state-inl.h"
#include "src/heap/heap-inl.h"
#include "src/heap/heap.h"
#include "src/init/v8.h"
namespace v8 {
namespace internal {
class ScavengeJob::Task : public CancelableTask {
public:
Task(Isolate* isolate, ScavengeJob* job)
: CancelableTask(isolate), isolate_(isolate), job_(job) {}
// CancelableTask overrides.
void RunInternal() override;
Isolate* isolate() const { return isolate_; }
private:
Isolate* const isolate_;
ScavengeJob* const job_;
};
size_t ScavengeJob::YoungGenerationTaskTriggerSize(Heap* heap) {
static constexpr double kTaskTriggerFactor = 0.8;
return heap->new_space()->Capacity() * kTaskTriggerFactor;
}
bool ScavengeJob::YoungGenerationSizeTaskTriggerReached(Heap* heap) {
return heap->new_space()->Size() >= YoungGenerationTaskTriggerSize(heap);
}
void ScavengeJob::ScheduleTaskIfNeeded(Heap* heap) {
if (!task_pending_ && !heap->IsTearingDown() &&
YoungGenerationSizeTaskTriggerReached(heap)) {
v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(heap->isolate());
auto taskrunner =
V8::GetCurrentPlatform()->GetForegroundTaskRunner(isolate);
taskrunner->PostTask(std::make_unique<Task>(heap->isolate(), this));
task_pending_ = true;
}
}
void ScavengeJob::Task::RunInternal() {
VMState<GC> state(isolate());
TRACE_EVENT_CALL_STATS_SCOPED(isolate(), "v8", "V8.Task");
if (ScavengeJob::YoungGenerationSizeTaskTriggerReached(isolate()->heap())) {
isolate()->heap()->CollectGarbage(NEW_SPACE,
GarbageCollectionReason::kTask);
}
job_->set_task_pending(false);
}
} // namespace internal
} // namespace v8
|
