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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 26 matching lines...) Expand all Loading... | |
37 | 37 |
38 MemoryPressureMonitor::MemoryPressureMonitor() | 38 MemoryPressureMonitor::MemoryPressureMonitor() |
39 : memory_level_event_source_(dispatch_source_create( | 39 : memory_level_event_source_(dispatch_source_create( |
40 DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, | 40 DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, |
41 0, | 41 0, |
42 DISPATCH_MEMORYPRESSURE_WARN | DISPATCH_MEMORYPRESSURE_CRITICAL | | 42 DISPATCH_MEMORYPRESSURE_WARN | DISPATCH_MEMORYPRESSURE_CRITICAL | |
43 DISPATCH_MEMORYPRESSURE_NORMAL, | 43 DISPATCH_MEMORYPRESSURE_NORMAL, |
44 dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0))), | 44 dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0))), |
45 dispatch_callback_( | 45 dispatch_callback_( |
46 base::Bind(&MemoryPressureListener::NotifyMemoryPressure)), | 46 base::Bind(&MemoryPressureListener::NotifyMemoryPressure)), |
47 last_pressure_change_(CFAbsoluteTimeGetCurrent()), | 47 last_statistic_report_(CFAbsoluteTimeGetCurrent()), |
Mark Mentovai
2016/11/14 19:12:15
Is this an OK initial value? It’s not associated w
lgrey
2016/11/14 19:23:51
I think so. Worst case scenario is the application
| |
48 last_pressure_level_(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE), | |
48 reporting_error_(0) { | 49 reporting_error_(0) { |
49 last_pressure_level_ = GetCurrentPressureLevel(); | |
50 dispatch_source_set_event_handler(memory_level_event_source_, ^{ | 50 dispatch_source_set_event_handler(memory_level_event_source_, ^{ |
51 OnMemoryPressureChanged(memory_level_event_source_.get(), | 51 OnMemoryPressureChanged(memory_level_event_source_.get(), |
52 dispatch_callback_); | 52 dispatch_callback_); |
53 }); | 53 }); |
54 dispatch_resume(memory_level_event_source_); | 54 dispatch_resume(memory_level_event_source_); |
55 } | 55 } |
56 | 56 |
57 MemoryPressureMonitor::~MemoryPressureMonitor() { | 57 MemoryPressureMonitor::~MemoryPressureMonitor() { |
58 dispatch_source_cancel(memory_level_event_source_); | 58 dispatch_source_cancel(memory_level_event_source_); |
59 } | 59 } |
60 | 60 |
61 MemoryPressureListener::MemoryPressureLevel | 61 MemoryPressureListener::MemoryPressureLevel |
62 MemoryPressureMonitor::GetCurrentPressureLevel() const { | 62 MemoryPressureMonitor::GetCurrentPressureLevel() { |
63 int mac_memory_pressure; | 63 int mac_memory_pressure; |
64 size_t length = sizeof(int); | 64 size_t length = sizeof(int); |
65 sysctlbyname("kern.memorystatus_vm_pressure_level", &mac_memory_pressure, | 65 sysctlbyname("kern.memorystatus_vm_pressure_level", &mac_memory_pressure, |
66 &length, nullptr, 0); | 66 &length, nullptr, 0); |
67 return MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); | 67 MemoryPressureListener::MemoryPressureLevel memory_pressure_level = |
68 MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); | |
69 bool pressure_level_changed = false; | |
70 if (last_pressure_level_ != memory_pressure_level) { | |
71 pressure_level_changed = true; | |
72 } | |
73 SendStatisticsIfNecessary(pressure_level_changed); | |
74 last_pressure_level_ = memory_pressure_level; | |
75 return memory_pressure_level; | |
68 } | 76 } |
77 | |
69 void MemoryPressureMonitor::OnMemoryPressureChanged( | 78 void MemoryPressureMonitor::OnMemoryPressureChanged( |
70 dispatch_source_s* event_source, | 79 dispatch_source_s* event_source, |
71 const MemoryPressureMonitor::DispatchCallback& dispatch_callback) { | 80 const MemoryPressureMonitor::DispatchCallback& dispatch_callback) { |
72 int mac_memory_pressure = dispatch_source_get_data(event_source); | 81 int mac_memory_pressure = dispatch_source_get_data(event_source); |
73 MemoryPressureListener::MemoryPressureLevel memory_pressure_level = | 82 MemoryPressureListener::MemoryPressureLevel memory_pressure_level = |
74 MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); | 83 MemoryPressureLevelForMacMemoryPressure(mac_memory_pressure); |
75 CFTimeInterval now = CFAbsoluteTimeGetCurrent(); | 84 bool pressure_level_changed = false; |
76 CFTimeInterval since_last_change = now - last_pressure_change_; | 85 if (last_pressure_level_ != memory_pressure_level) { |
77 last_pressure_change_ = now; | 86 pressure_level_changed = true; |
78 | 87 } |
79 double ticks_to_report; | 88 SendStatisticsIfNecessary(pressure_level_changed); |
80 reporting_error_ = | |
81 modf(since_last_change + reporting_error_, &ticks_to_report); | |
82 | |
83 // Sierra fails to call the handler when pressure returns to normal, | |
84 // which would skew our data. For example, if pressure went to 'warn' | |
85 // at T0, back to 'normal' at T1, then to 'critical' at T10, we would | |
86 // report 10 ticks of 'warn' instead of 1 tick of 'warn' and 9 ticks | |
87 // of 'normal'. | |
88 // This is rdar://29114314 | |
89 if (mac::IsAtMostOS10_11()) | |
90 RecordMemoryPressure(last_pressure_level_, | |
91 static_cast<int>(ticks_to_report)); | |
92 | |
93 last_pressure_level_ = memory_pressure_level; | 89 last_pressure_level_ = memory_pressure_level; |
94 if (memory_pressure_level != | 90 if (memory_pressure_level != |
95 MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE) | 91 MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE) |
96 dispatch_callback.Run(memory_pressure_level); | 92 dispatch_callback.Run(memory_pressure_level); |
97 } | 93 } |
98 | 94 |
95 void MemoryPressureMonitor::SendStatisticsIfNecessary( | |
96 bool pressure_level_changed) { | |
97 CFTimeInterval now = CFAbsoluteTimeGetCurrent(); | |
98 CFTimeInterval since_last_report = now - last_statistic_report_; | |
99 last_statistic_report_ = now; | |
100 | |
101 double ticks_to_report; | |
102 reporting_error_ = | |
103 modf(since_last_report + reporting_error_, &ticks_to_report); | |
Mark Mentovai
2016/11/14 19:12:15
Good practice is to not use modf(), but instead us
lgrey
2016/11/14 19:23:51
Done.
| |
104 | |
105 // Round up on change to ensure we capture it | |
106 if (pressure_level_changed && ticks_to_report < 0) | |
107 ticks_to_report = 1; | |
108 | |
109 if (ticks_to_report > 0) | |
110 RecordMemoryPressure(last_pressure_level_, | |
111 static_cast<int>(ticks_to_report)); | |
112 } | |
113 | |
99 void MemoryPressureMonitor::SetDispatchCallback( | 114 void MemoryPressureMonitor::SetDispatchCallback( |
100 const DispatchCallback& callback) { | 115 const DispatchCallback& callback) { |
101 dispatch_callback_ = callback; | 116 dispatch_callback_ = callback; |
102 } | 117 } |
103 | 118 |
104 } // namespace mac | 119 } // namespace mac |
105 } // namespace base | 120 } // namespace base |
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