OLD | NEW |
---|---|
1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium 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 "base/memory/memory_pressure_monitor_mac.h" | 5 #include "base/memory/memory_pressure_monitor_mac.h" |
6 | 6 |
7 #include <dlfcn.h> | 7 #include <dlfcn.h> |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <sys/sysctl.h> | 9 #include <sys/sysctl.h> |
10 | 10 |
(...skipping 15 matching lines...) Expand all Loading... | |
26 case DISPATCH_MEMORYPRESSURE_NORMAL: | 26 case DISPATCH_MEMORYPRESSURE_NORMAL: |
27 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE; | 27 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE; |
28 case DISPATCH_MEMORYPRESSURE_WARN: | 28 case DISPATCH_MEMORYPRESSURE_WARN: |
29 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE; | 29 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE; |
30 case DISPATCH_MEMORYPRESSURE_CRITICAL: | 30 case DISPATCH_MEMORYPRESSURE_CRITICAL: |
31 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL; | 31 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL; |
32 } | 32 } |
33 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE; | 33 return MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE; |
34 } | 34 } |
35 | 35 |
36 void MemoryPressureMonitor::NotifyMemoryPressureChanged( | |
37 dispatch_source_s* event_source, | |
38 const MemoryPressureMonitor::DispatchCallback& dispatch_callback) { | |
39 int mac_memory_pressure = dispatch_source_get_data(event_source); | |
40 MemoryPressureListener::MemoryPressureLevel memory_pressure_level = | |
41 MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); | |
42 dispatch_callback.Run(memory_pressure_level); | |
43 } | |
44 | |
45 MemoryPressureMonitor::MemoryPressureMonitor() | 36 MemoryPressureMonitor::MemoryPressureMonitor() |
46 // The MemoryPressureListener doesn't want to know about transitions to | |
47 // MEMORY_PRESSURE_LEVEL_NONE so don't watch for | |
48 // DISPATCH_MEMORYPRESSURE_NORMAL notifications. | |
49 : memory_level_event_source_(dispatch_source_create( | 37 : memory_level_event_source_(dispatch_source_create( |
50 DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, | 38 DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, |
51 0, | 39 0, |
52 DISPATCH_MEMORYPRESSURE_WARN | DISPATCH_MEMORYPRESSURE_CRITICAL, | 40 DISPATCH_MEMORYPRESSURE_WARN | DISPATCH_MEMORYPRESSURE_CRITICAL | |
41 DISPATCH_MEMORYPRESSURE_NORMAL, | |
53 dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0))), | 42 dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0))), |
54 dispatch_callback_( | 43 dispatch_callback_( |
55 base::Bind(&MemoryPressureListener::NotifyMemoryPressure)) { | 44 base::Bind(&MemoryPressureListener::NotifyMemoryPressure)), |
shrike
2016/10/20 21:04:31
I think MemoryPressureListener::NotifyMemoryPressu
lgrey
2016/10/21 14:15:04
This threw me for a loop for a bit, then I realize
chrisha
2016/10/21 18:18:58
Yeah, the rename might help. Maybe "OnMemoryPressu
lgrey
2016/10/21 18:39:35
Done.
| |
45 last_pressure_change_(CFAbsoluteTimeGetCurrent()) { | |
46 last_pressure_level_ = GetCurrentPressureLevel(); | |
56 dispatch_source_set_event_handler(memory_level_event_source_, ^{ | 47 dispatch_source_set_event_handler(memory_level_event_source_, ^{ |
57 NotifyMemoryPressureChanged(memory_level_event_source_.get(), | 48 NotifyMemoryPressureChanged(memory_level_event_source_.get(), |
58 dispatch_callback_); | 49 dispatch_callback_); |
59 }); | 50 }); |
60 dispatch_resume(memory_level_event_source_); | 51 dispatch_resume(memory_level_event_source_); |
61 } | 52 } |
62 | 53 |
63 MemoryPressureMonitor::~MemoryPressureMonitor() { | 54 MemoryPressureMonitor::~MemoryPressureMonitor() { |
64 dispatch_source_cancel(memory_level_event_source_); | 55 dispatch_source_cancel(memory_level_event_source_); |
65 } | 56 } |
66 | 57 |
67 MemoryPressureListener::MemoryPressureLevel | 58 MemoryPressureListener::MemoryPressureLevel |
68 MemoryPressureMonitor::GetCurrentPressureLevel() const { | 59 MemoryPressureMonitor::GetCurrentPressureLevel() const { |
69 int mac_memory_pressure; | 60 int mac_memory_pressure; |
70 size_t length = sizeof(int); | 61 size_t length = sizeof(int); |
71 sysctlbyname("kern.memorystatus_vm_pressure_level", &mac_memory_pressure, | 62 sysctlbyname("kern.memorystatus_vm_pressure_level", &mac_memory_pressure, |
72 &length, nullptr, 0); | 63 &length, nullptr, 0); |
73 return MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); | 64 return MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); |
74 } | 65 } |
66 void MemoryPressureMonitor::NotifyMemoryPressureChanged( | |
67 dispatch_source_s* event_source, | |
68 const MemoryPressureMonitor::DispatchCallback& dispatch_callback) { | |
69 int mac_memory_pressure = dispatch_source_get_data(event_source); | |
70 MemoryPressureListener::MemoryPressureLevel memory_pressure_level = | |
71 MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); | |
72 CFTimeInterval now = CFAbsoluteTimeGetCurrent(); | |
73 CFTimeInterval since_last_change = now - last_pressure_change_; | |
74 last_pressure_change_ = now; | |
75 | |
76 // TODO(lgrey): Two questions: | |
77 // 1) Is it OK to give up precision by flooring this? | |
78 // 2) Is there a better way to send multiple events? | |
79 int last_level_seconds = static_cast<int>(since_last_change); | |
80 for (int i = 0; i < last_level_seconds; i++) { | |
shrike
2016/10/20 21:04:30
This is unfortunate, because last_level_seconds co
lgrey
2016/10/21 14:15:04
asvitkine@ what do you think?
For context, this p
chrisha
2016/10/21 18:18:58
We had talked about switching to polling on Mac, a
lgrey
2016/10/21 18:39:35
My mistake, it looks like Chrome polls once a seco
| |
81 RecordMemoryPressure(last_pressure_level_); | |
82 } | |
83 last_pressure_level_ = memory_pressure_level; | |
84 if (memory_pressure_level != | |
85 MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE) | |
86 dispatch_callback.Run(memory_pressure_level); | |
87 } | |
75 | 88 |
76 void MemoryPressureMonitor::SetDispatchCallback( | 89 void MemoryPressureMonitor::SetDispatchCallback( |
77 const DispatchCallback& callback) { | 90 const DispatchCallback& callback) { |
78 dispatch_callback_ = callback; | 91 dispatch_callback_ = callback; |
79 } | 92 } |
80 | 93 |
81 } // namespace mac | 94 } // namespace mac |
82 } // namespace base | 95 } // namespace base |
OLD | NEW |