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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 // Dumps CPU and IO stats to a file at a regular interval. | 5 // Dumps CPU and IO stats to a file at a regular interval. |
6 // | 6 // |
7 // Output may be post processed by host to get top/iotop style information. | 7 // Output may be post processed by host to get top/iotop style information. |
8 | 8 |
9 #include <signal.h> | 9 #include <signal.h> |
10 #include <unistd.h> | 10 #include <unistd.h> |
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37 // Yes, this buffers everything in memory, so it cannot be used for extended | 37 // Yes, this buffers everything in memory, so it cannot be used for extended |
38 // durations without OOM. But that beats writing during the trace which | 38 // durations without OOM. But that beats writing during the trace which |
39 // would affect the results. | 39 // would affect the results. |
40 void Start(int hz) { | 40 void Start(int hz) { |
41 const int sample_interval = 1000000 / hz; | 41 const int sample_interval = 1000000 / hz; |
42 const base::FilePath io_stats_path(kIOStatsPath); | 42 const base::FilePath io_stats_path(kIOStatsPath); |
43 const base::FilePath cpu_stats_path(kCPUStatsPath); | 43 const base::FilePath cpu_stats_path(kCPUStatsPath); |
44 std::string out; | 44 std::string out; |
45 while (record_) { | 45 while (record_) { |
46 out.clear(); | 46 out.clear(); |
47 CHECK(file_util::ReadFileToString(io_stats_path, &out)); | 47 CHECK(base::ReadFileToString(io_stats_path, &out)); |
48 CHECK(file_util::ReadFileToString(cpu_stats_path, &out)); | 48 CHECK(base::ReadFileToString(cpu_stats_path, &out)); |
49 samples_.push_back(out); | 49 samples_.push_back(out); |
50 usleep(sample_interval); | 50 usleep(sample_interval); |
51 } | 51 } |
52 } | 52 } |
53 | 53 |
54 // Stops recording and saves samples to file. | 54 // Stops recording and saves samples to file. |
55 void StopAndDumpStats() { | 55 void StopAndDumpStats() { |
56 record_ = false; | 56 record_ = false; |
57 usleep(250 * 1000); | 57 usleep(250 * 1000); |
58 std::ofstream out_stream; | 58 std::ofstream out_stream; |
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99 kDefaultHz; | 99 kDefaultHz; |
100 | 100 |
101 printf("Starting device stats monitor\n"); | 101 printf("Starting device stats monitor\n"); |
102 g_device_stats_monitor = new DeviceStatsMonitor(args[0]); | 102 g_device_stats_monitor = new DeviceStatsMonitor(args[0]); |
103 signal(SIGTERM, SigTermHandler); | 103 signal(SIGTERM, SigTermHandler); |
104 g_device_stats_monitor->Start(hz); | 104 g_device_stats_monitor->Start(hz); |
105 delete g_device_stats_monitor; | 105 delete g_device_stats_monitor; |
106 | 106 |
107 return 0; | 107 return 0; |
108 } | 108 } |
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