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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 "athena/resource_manager/public/resource_manager_delegate.h" | 5 #include "athena/resource_manager/public/resource_manager_delegate.h" |
6 | 6 |
7 #include <string> | 7 #include <string> |
8 | 8 |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "base/macros.h" | 10 #include "base/macros.h" |
11 #include "base/process/process_metrics.h" | 11 #include "base/process/process_metrics.h" |
12 | 12 |
13 namespace athena { | 13 namespace athena { |
14 | 14 |
15 namespace { | 15 namespace { |
16 // This is the minimum amount of time in milliseconds between checks for | 16 // This is the minimum amount of time in milliseconds between checks for |
17 // memory pressure. | 17 // memory pressure. |
18 const int kMemoryPressureIntervalMs = 750; | 18 const int kMemoryPressureIntervalMs = 750; |
19 } // namespace | 19 } // namespace |
20 | 20 |
21 class ResourceManagerDelegateImpl : public ResourceManagerDelegate { | 21 class ResourceManagerDelegateImpl : public ResourceManagerDelegate { |
22 public: | 22 public: |
23 ResourceManagerDelegateImpl() {} | 23 ResourceManagerDelegateImpl() {} |
24 virtual ~ResourceManagerDelegateImpl() {} | 24 virtual ~ResourceManagerDelegateImpl() {} |
25 | 25 |
26 private: | 26 private: |
27 virtual int GetUsedMemoryInPercent() OVERRIDE { | 27 virtual int GetUsedMemoryInPercent() override { |
28 base::SystemMemoryInfoKB info; | 28 base::SystemMemoryInfoKB info; |
29 if (!base::GetSystemMemoryInfo(&info)) { | 29 if (!base::GetSystemMemoryInfo(&info)) { |
30 LOG(WARNING) << "Cannot determine the free memory of the system."; | 30 LOG(WARNING) << "Cannot determine the free memory of the system."; |
31 return 0; | 31 return 0; |
32 } | 32 } |
33 // TODO(skuhne): Instead of adding the kernel memory pressure calculation | 33 // TODO(skuhne): Instead of adding the kernel memory pressure calculation |
34 // logic here, we should have a kernel mechanism similar to the low memory | 34 // logic here, we should have a kernel mechanism similar to the low memory |
35 // notifier in ChromeOS which offers multiple pressure states. | 35 // notifier in ChromeOS which offers multiple pressure states. |
36 // To track this, we have crbug.com/381196. | 36 // To track this, we have crbug.com/381196. |
37 | 37 |
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54 | 54 |
55 // Available memory is the sum of free, swap and easy reclaimable memory. | 55 // Available memory is the sum of free, swap and easy reclaimable memory. |
56 int available_memory = | 56 int available_memory = |
57 info.free + info.swap_free / kSwapWeight + file_memory; | 57 info.free + info.swap_free / kSwapWeight + file_memory; |
58 | 58 |
59 DCHECK(available_memory < total_memory); | 59 DCHECK(available_memory < total_memory); |
60 int percentage = ((total_memory - available_memory) * 100) / total_memory; | 60 int percentage = ((total_memory - available_memory) * 100) / total_memory; |
61 return percentage; | 61 return percentage; |
62 } | 62 } |
63 | 63 |
64 virtual int MemoryPressureIntervalInMS() OVERRIDE { | 64 virtual int MemoryPressureIntervalInMS() override { |
65 return kMemoryPressureIntervalMs; | 65 return kMemoryPressureIntervalMs; |
66 } | 66 } |
67 DISALLOW_COPY_AND_ASSIGN(ResourceManagerDelegateImpl); | 67 DISALLOW_COPY_AND_ASSIGN(ResourceManagerDelegateImpl); |
68 }; | 68 }; |
69 | 69 |
70 // static | 70 // static |
71 ResourceManagerDelegate* | 71 ResourceManagerDelegate* |
72 ResourceManagerDelegate::CreateResourceManagerDelegate() { | 72 ResourceManagerDelegate::CreateResourceManagerDelegate() { |
73 return new ResourceManagerDelegateImpl; | 73 return new ResourceManagerDelegateImpl; |
74 } | 74 } |
75 | 75 |
76 } // namespace athena | 76 } // namespace athena |
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