[go: nahoru, domu]
Google Git
Sign in
chromium / chromium / src / 7c7877065d84a165dad4d0e2c77f45eae3983421 / . / base / process / process_metrics_linux.cc
blob: c6aff3e85bcaafb4c57fe19069335e527029c2ab [file] [log] [blame]
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/process/process_metrics.h"
6
7#include <dirent.h>
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]8#include <fcntl.h>
avibeced7c2015-12-24 06:47:59[diff] [blame]9#include <stddef.h>
10#include <stdint.h>
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]11#include <sys/stat.h>
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]12#include <sys/time.h>
13#include <sys/types.h>
14#include <unistd.h>
danakj0c8d4aa2015-11-25 05:29:58[diff] [blame]15#include <utility>
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]16
thestigcf4c85b2015-12-16 08:33:30[diff] [blame]17#include "base/files/dir_reader_posix.h"
brettw@chromium.orge3177dd52014-08-13 20:22:14[diff] [blame]18#include "base/files/file_util.h"
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]19#include "base/logging.h"
20#include "base/process/internal_linux.h"
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]21#include "base/strings/string_number_conversions.h"
22#include "base/strings/string_split.h"
23#include "base/strings/string_tokenizer.h"
avi@chromium.orgd1a5a2f2013-06-10 21:17:40[diff] [blame]24#include "base/strings/string_util.h"
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]25#include "base/sys_info.h"
26#include "base/threading/thread_restrictions.h"
avibeced7c2015-12-24 06:47:59[diff] [blame]27#include "build/build_config.h"
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]28
29namespace base {
30
31namespace {
32
thestig75844fdb2014-09-09 19:47:10[diff] [blame]33void TrimKeyValuePairs(StringPairs* pairs) {
34 DCHECK(pairs);
35 StringPairs& p_ref = *pairs;
36 for (size_t i = 0; i < p_ref.size(); ++i) {
37 TrimWhitespaceASCII(p_ref[i].first, TRIM_ALL, &p_ref[i].first);
38 TrimWhitespaceASCII(p_ref[i].second, TRIM_ALL, &p_ref[i].second);
39 }
40}
41
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]42#if defined(OS_CHROMEOS)
avibeced7c2015-12-24 06:47:59[diff] [blame]43// Read a file with a single number string and return the number as a uint64_t.
44static uint64_t ReadFileToUint64(const FilePath file) {
nduca@chromium.orgf4134782013-08-29 21:25:20[diff] [blame]45 std::string file_as_string;
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]46 if (!ReadFileToString(file, &file_as_string))
nduca@chromium.orgf4134782013-08-29 21:25:20[diff] [blame]47 return 0;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]48 TrimWhitespaceASCII(file_as_string, TRIM_ALL, &file_as_string);
avibeced7c2015-12-24 06:47:59[diff] [blame]49 uint64_t file_as_uint64 = 0;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]50 if (!StringToUint64(file_as_string, &file_as_uint64))
nduca@chromium.orgf4134782013-08-29 21:25:20[diff] [blame]51 return 0;
52 return file_as_uint64;
53}
54#endif
55
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]56// Read /proc/<pid>/status and return the value for |field|, or 0 on failure.
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]57// Only works for fields in the form of "Field: value kB".
58size_t ReadProcStatusAndGetFieldAsSizeT(pid_t pid, const std::string& field) {
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]59 std::string status;
60 {
thestig75844fdb2014-09-09 19:47:10[diff] [blame]61 // Synchronously reading files in /proc does not hit the disk.
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]62 ThreadRestrictions::ScopedAllowIO allow_io;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]63 FilePath stat_file = internal::GetProcPidDir(pid).Append("status");
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]64 if (!ReadFileToString(stat_file, &status))
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]65 return 0;
66 }
67
thestig75844fdb2014-09-09 19:47:10[diff] [blame]68 StringPairs pairs;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]69 SplitStringIntoKeyValuePairs(status, ':', '\n', &pairs);
thestig75844fdb2014-09-09 19:47:10[diff] [blame]70 TrimKeyValuePairs(&pairs);
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]71 for (size_t i = 0; i < pairs.size(); ++i) {
thestig75844fdb2014-09-09 19:47:10[diff] [blame]72 const std::string& key = pairs[i].first;
73 const std::string& value_str = pairs[i].second;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]74 if (key == field) {
brettw26dab8f02015-08-08 00:28:47[diff] [blame]75 std::vector<StringPiece> split_value_str = SplitStringPiece(
76 value_str, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]77 if (split_value_str.size() != 2 || split_value_str[1] != "kB") {
78 NOTREACHED();
79 return 0;
80 }
81 size_t value;
82 if (!StringToSizeT(split_value_str[0], &value)) {
83 NOTREACHED();
84 return 0;
85 }
86 return value;
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]87 }
88 }
sside5fb5cd2016-01-26 12:34:06[diff] [blame]89 // This can be reached if the process dies when proc is read -- in that case,
90 // the kernel can return missing fields.
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]91 return 0;
92}
93
thestig75844fdb2014-09-09 19:47:10[diff] [blame]94#if defined(OS_LINUX)
95// Read /proc/<pid>/sched and look for |field|. On succes, return true and
96// write the value for |field| into |result|.
97// Only works for fields in the form of "field : uint_value"
98bool ReadProcSchedAndGetFieldAsUint64(pid_t pid,
99 const std::string& field,
avibeced7c2015-12-24 06:47:59[diff] [blame]100 uint64_t* result) {
thestig75844fdb2014-09-09 19:47:10[diff] [blame]101 std::string sched_data;
102 {
103 // Synchronously reading files in /proc does not hit the disk.
104 ThreadRestrictions::ScopedAllowIO allow_io;
105 FilePath sched_file = internal::GetProcPidDir(pid).Append("sched");
106 if (!ReadFileToString(sched_file, &sched_data))
107 return false;
108 }
109
110 StringPairs pairs;
111 SplitStringIntoKeyValuePairs(sched_data, ':', '\n', &pairs);
112 TrimKeyValuePairs(&pairs);
113 for (size_t i = 0; i < pairs.size(); ++i) {
114 const std::string& key = pairs[i].first;
115 const std::string& value_str = pairs[i].second;
116 if (key == field) {
avibeced7c2015-12-24 06:47:59[diff] [blame]117 uint64_t value;
thestig75844fdb2014-09-09 19:47:10[diff] [blame]118 if (!StringToUint64(value_str, &value))
119 return false;
120 *result = value;
121 return true;
122 }
123 }
124 return false;
125}
126#endif // defined(OS_LINUX)
127
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]128// Get the total CPU of a single process. Return value is number of jiffies
129// on success or -1 on error.
130int GetProcessCPU(pid_t pid) {
131 // Use /proc/<pid>/task to find all threads and parse their /stat file.
132 FilePath task_path = internal::GetProcPidDir(pid).Append("task");
133
134 DIR* dir = opendir(task_path.value().c_str());
135 if (!dir) {
136 DPLOG(ERROR) << "opendir(" << task_path.value() << ")";
137 return -1;
138 }
139
140 int total_cpu = 0;
141 while (struct dirent* ent = readdir(dir)) {
142 pid_t tid = internal::ProcDirSlotToPid(ent->d_name);
143 if (!tid)
144 continue;
145
thestig75844fdb2014-09-09 19:47:10[diff] [blame]146 // Synchronously reading files in /proc does not hit the disk.
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]147 ThreadRestrictions::ScopedAllowIO allow_io;
148
149 std::string stat;
150 FilePath stat_path =
151 task_path.Append(ent->d_name).Append(internal::kStatFile);
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]152 if (ReadFileToString(stat_path, &stat)) {
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]153 int cpu = ParseProcStatCPU(stat);
154 if (cpu > 0)
155 total_cpu += cpu;
156 }
157 }
158 closedir(dir);
159
160 return total_cpu;
161}
162
163} // namespace
164
165// static
166ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
167 return new ProcessMetrics(process);
168}
169
170// On linux, we return vsize.
171size_t ProcessMetrics::GetPagefileUsage() const {
172 return internal::ReadProcStatsAndGetFieldAsSizeT(process_,
173 internal::VM_VSIZE);
174}
175
176// On linux, we return the high water mark of vsize.
177size_t ProcessMetrics::GetPeakPagefileUsage() const {
178 return ReadProcStatusAndGetFieldAsSizeT(process_, "VmPeak") * 1024;
179}
180
181// On linux, we return RSS.
182size_t ProcessMetrics::GetWorkingSetSize() const {
183 return internal::ReadProcStatsAndGetFieldAsSizeT(process_, internal::VM_RSS) *
184 getpagesize();
185}
186
187// On linux, we return the high water mark of RSS.
188size_t ProcessMetrics::GetPeakWorkingSetSize() const {
189 return ReadProcStatusAndGetFieldAsSizeT(process_, "VmHWM") * 1024;
190}
191
192bool ProcessMetrics::GetMemoryBytes(size_t* private_bytes,
193 size_t* shared_bytes) {
194 WorkingSetKBytes ws_usage;
195 if (!GetWorkingSetKBytes(&ws_usage))
196 return false;
197
198 if (private_bytes)
199 *private_bytes = ws_usage.priv * 1024;
200
201 if (shared_bytes)
202 *shared_bytes = ws_usage.shared * 1024;
203
204 return true;
205}
206
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]207bool ProcessMetrics::GetWorkingSetKBytes(WorkingSetKBytes* ws_usage) const {
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]208#if defined(OS_CHROMEOS)
209 if (GetWorkingSetKBytesTotmaps(ws_usage))
210 return true;
211#endif
212 return GetWorkingSetKBytesStatm(ws_usage);
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]213}
214
215double ProcessMetrics::GetCPUUsage() {
thakis@chromium.orge21c3322014-04-06 21:25:01[diff] [blame]216 TimeTicks time = TimeTicks::Now();
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]217
thakis@chromium.orge21c3322014-04-06 21:25:01[diff] [blame]218 if (last_cpu_ == 0) {
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]219 // First call, just set the last values.
thakis@chromium.orgac6d0652014-01-14 00:06:37[diff] [blame]220 last_cpu_time_ = time;
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]221 last_cpu_ = GetProcessCPU(process_);
afakhry8c03da072015-12-03 01:26:19[diff] [blame]222 return 0.0;
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]223 }
224
afakhry8c03da072015-12-03 01:26:19[diff] [blame]225 TimeDelta time_delta = time - last_cpu_time_;
226 if (time_delta.is_zero()) {
227 NOTREACHED();
228 return 0.0;
229 }
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]230
231 int cpu = GetProcessCPU(process_);
232
233 // We have the number of jiffies in the time period. Convert to percentage.
234 // Note this means we will go *over* 100 in the case where multiple threads
235 // are together adding to more than one CPU's worth.
simonjam@chromium.org36e8fd42013-08-08 17:24:18[diff] [blame]236 TimeDelta cpu_time = internal::ClockTicksToTimeDelta(cpu);
237 TimeDelta last_cpu_time = internal::ClockTicksToTimeDelta(last_cpu_);
afakhry8c03da072015-12-03 01:26:19[diff] [blame]238
239 // If the number of threads running in the process has decreased since the
240 // last time this function was called, |last_cpu_time| will be greater than
241 // |cpu_time| which will result in a negative value in the below percentage
242 // calculation. We prevent this by clamping to 0. crbug.com/546565.
243 // This computation is known to be shaky when threads are destroyed between
244 // "last" and "now", but for our current purposes, it's all right.
245 double percentage = 0.0;
246 if (last_cpu_time < cpu_time) {
247 percentage = 100.0 * (cpu_time - last_cpu_time).InSecondsF() /
248 time_delta.InSecondsF();
249 }
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]250
thakis@chromium.orgac6d0652014-01-14 00:06:37[diff] [blame]251 last_cpu_time_ = time;
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]252 last_cpu_ = cpu;
253
254 return percentage;
255}
256
257// To have /proc/self/io file you must enable CONFIG_TASK_IO_ACCOUNTING
258// in your kernel configuration.
259bool ProcessMetrics::GetIOCounters(IoCounters* io_counters) const {
thestig75844fdb2014-09-09 19:47:10[diff] [blame]260 // Synchronously reading files in /proc does not hit the disk.
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]261 ThreadRestrictions::ScopedAllowIO allow_io;
262
263 std::string proc_io_contents;
264 FilePath io_file = internal::GetProcPidDir(process_).Append("io");
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]265 if (!ReadFileToString(io_file, &proc_io_contents))
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]266 return false;
267
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]268 io_counters->OtherOperationCount = 0;
269 io_counters->OtherTransferCount = 0;
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]270
thestig75844fdb2014-09-09 19:47:10[diff] [blame]271 StringPairs pairs;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]272 SplitStringIntoKeyValuePairs(proc_io_contents, ':', '\n', &pairs);
thestig75844fdb2014-09-09 19:47:10[diff] [blame]273 TrimKeyValuePairs(&pairs);
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]274 for (size_t i = 0; i < pairs.size(); ++i) {
thestig75844fdb2014-09-09 19:47:10[diff] [blame]275 const std::string& key = pairs[i].first;
276 const std::string& value_str = pairs[i].second;
avibeced7c2015-12-24 06:47:59[diff] [blame]277 uint64_t* target_counter = NULL;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]278 if (key == "syscr")
279 target_counter = &io_counters->ReadOperationCount;
280 else if (key == "syscw")
281 target_counter = &io_counters->WriteOperationCount;
282 else if (key == "rchar")
283 target_counter = &io_counters->ReadTransferCount;
284 else if (key == "wchar")
285 target_counter = &io_counters->WriteTransferCount;
286 if (!target_counter)
287 continue;
288 bool converted = StringToUint64(value_str, target_counter);
289 DCHECK(converted);
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]290 }
291 return true;
292}
293
afakhry43b3bb72015-12-15 21:57:59[diff] [blame]294#if defined(OS_LINUX)
295int ProcessMetrics::GetOpenFdCount() const {
296 // Use /proc/<pid>/fd to count the number of entries there.
297 FilePath fd_path = internal::GetProcPidDir(process_).Append("fd");
298
thestigcf4c85b2015-12-16 08:33:30[diff] [blame]299 DirReaderPosix dir_reader(fd_path.value().c_str());
300 if (!dir_reader.IsValid())
afakhry43b3bb72015-12-15 21:57:59[diff] [blame]301 return -1;
afakhry43b3bb72015-12-15 21:57:59[diff] [blame]302
303 int total_count = 0;
thestigcf4c85b2015-12-16 08:33:30[diff] [blame]304 for (; dir_reader.Next(); ) {
305 const char* name = dir_reader.name();
306 if (strcmp(name, ".") != 0 && strcmp(name, "..") != 0)
307 ++total_count;
308 }
afakhry43b3bb72015-12-15 21:57:59[diff] [blame]309
310 return total_count;
311}
312#endif // defined(OS_LINUX)
313
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]314ProcessMetrics::ProcessMetrics(ProcessHandle process)
315 : process_(process),
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]316 last_system_time_(0),
thestig75844fdb2014-09-09 19:47:10[diff] [blame]317#if defined(OS_LINUX)
318 last_absolute_idle_wakeups_(0),
319#endif
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]320 last_cpu_(0) {
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]321 processor_count_ = SysInfo::NumberOfProcessors();
davemoore@chromium.orgc8db21c2013-05-28 20:16:49[diff] [blame]322}
323
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]324#if defined(OS_CHROMEOS)
325// Private, Shared and Proportional working set sizes are obtained from
326// /proc/<pid>/totmaps
327bool ProcessMetrics::GetWorkingSetKBytesTotmaps(WorkingSetKBytes *ws_usage)
328 const {
329 // The format of /proc/<pid>/totmaps is:
330 //
331 // Rss: 6120 kB
332 // Pss: 3335 kB
333 // Shared_Clean: 1008 kB
334 // Shared_Dirty: 4012 kB
335 // Private_Clean: 4 kB
336 // Private_Dirty: 1096 kB
davemoore@chromium.org23deabb72013-07-16 21:55:20[diff] [blame]337 // Referenced: XXX kB
338 // Anonymous: XXX kB
339 // AnonHugePages: XXX kB
340 // Swap: XXX kB
341 // Locked: XXX kB
342 const size_t kPssIndex = (1 * 3) + 1;
343 const size_t kPrivate_CleanIndex = (4 * 3) + 1;
344 const size_t kPrivate_DirtyIndex = (5 * 3) + 1;
345 const size_t kSwapIndex = (9 * 3) + 1;
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]346
347 std::string totmaps_data;
348 {
349 FilePath totmaps_file = internal::GetProcPidDir(process_).Append("totmaps");
350 ThreadRestrictions::ScopedAllowIO allow_io;
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]351 bool ret = ReadFileToString(totmaps_file, &totmaps_data);
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]352 if (!ret || totmaps_data.length() == 0)
353 return false;
354 }
355
brettw83dc1612015-08-12 07:31:18[diff] [blame]356 std::vector<std::string> totmaps_fields = SplitString(
357 totmaps_data, base::kWhitespaceASCII, base::KEEP_WHITESPACE,
358 base::SPLIT_WANT_NONEMPTY);
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]359
360 DCHECK_EQ("Pss:", totmaps_fields[kPssIndex-1]);
davemoore@chromium.org23deabb72013-07-16 21:55:20[diff] [blame]361 DCHECK_EQ("Private_Clean:", totmaps_fields[kPrivate_CleanIndex - 1]);
362 DCHECK_EQ("Private_Dirty:", totmaps_fields[kPrivate_DirtyIndex - 1]);
363 DCHECK_EQ("Swap:", totmaps_fields[kSwapIndex-1]);
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]364
davemoore@chromium.org23deabb72013-07-16 21:55:20[diff] [blame]365 int pss = 0;
366 int private_clean = 0;
367 int private_dirty = 0;
368 int swap = 0;
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]369 bool ret = true;
370 ret &= StringToInt(totmaps_fields[kPssIndex], &pss);
371 ret &= StringToInt(totmaps_fields[kPrivate_CleanIndex], &private_clean);
372 ret &= StringToInt(totmaps_fields[kPrivate_DirtyIndex], &private_dirty);
davemoore@chromium.org23deabb72013-07-16 21:55:20[diff] [blame]373 ret &= StringToInt(totmaps_fields[kSwapIndex], &swap);
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]374
davemoore@chromium.org23deabb72013-07-16 21:55:20[diff] [blame]375 // On ChromeOS swap is to zram. We count this as private / shared, as
376 // increased swap decreases available RAM to user processes, which would
377 // otherwise create surprising results.
378 ws_usage->priv = private_clean + private_dirty + swap;
379 ws_usage->shared = pss + swap;
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]380 ws_usage->shareable = 0;
davemoore@chromium.org23deabb72013-07-16 21:55:20[diff] [blame]381 ws_usage->swapped = swap;
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]382 return ret;
383}
384#endif
385
386// Private and Shared working set sizes are obtained from /proc/<pid>/statm.
387bool ProcessMetrics::GetWorkingSetKBytesStatm(WorkingSetKBytes* ws_usage)
388 const {
389 // Use statm instead of smaps because smaps is:
390 // a) Large and slow to parse.
391 // b) Unavailable in the SUID sandbox.
392
393 // First we need to get the page size, since everything is measured in pages.
394 // For details, see: man 5 proc.
395 const int page_size_kb = getpagesize() / 1024;
396 if (page_size_kb <= 0)
397 return false;
398
399 std::string statm;
400 {
401 FilePath statm_file = internal::GetProcPidDir(process_).Append("statm");
thestig75844fdb2014-09-09 19:47:10[diff] [blame]402 // Synchronously reading files in /proc does not hit the disk.
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]403 ThreadRestrictions::ScopedAllowIO allow_io;
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]404 bool ret = ReadFileToString(statm_file, &statm);
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]405 if (!ret || statm.length() == 0)
406 return false;
407 }
408
brettw26dab8f02015-08-08 00:28:47[diff] [blame]409 std::vector<StringPiece> statm_vec = SplitStringPiece(
410 statm, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]411 if (statm_vec.size() != 7)
412 return false; // Not the format we expect.
413
414 int statm_rss, statm_shared;
415 bool ret = true;
416 ret &= StringToInt(statm_vec[1], &statm_rss);
417 ret &= StringToInt(statm_vec[2], &statm_shared);
418
419 ws_usage->priv = (statm_rss - statm_shared) * page_size_kb;
420 ws_usage->shared = statm_shared * page_size_kb;
421
422 // Sharable is not calculated, as it does not provide interesting data.
423 ws_usage->shareable = 0;
424
davemoore@chromium.org23deabb72013-07-16 21:55:20[diff] [blame]425#if defined(OS_CHROMEOS)
426 // Can't get swapped memory from statm.
427 ws_usage->swapped = 0;
428#endif
429
davemoore@chromium.org7b9c98872013-05-29 15:42:04[diff] [blame]430 return ret;
431}
432
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]433size_t GetSystemCommitCharge() {
434 SystemMemoryInfoKB meminfo;
435 if (!GetSystemMemoryInfo(&meminfo))
436 return 0;
437 return meminfo.total - meminfo.free - meminfo.buffers - meminfo.cached;
438}
439
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]440int ParseProcStatCPU(const std::string& input) {
afakhry597a8512015-02-05 00:51:57[diff] [blame]441 // |input| may be empty if the process disappeared somehow.
442 // e.g. http://crbug.com/145811.
443 if (input.empty())
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]444 return -1;
445
afakhry597a8512015-02-05 00:51:57[diff] [blame]446 size_t start = input.find_last_of(')');
447 if (start == input.npos)
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]448 return -1;
afakhry597a8512015-02-05 00:51:57[diff] [blame]449
450 // Number of spaces remaining until reaching utime's index starting after the
451 // last ')'.
452 int num_spaces_remaining = internal::VM_UTIME - 1;
453
454 size_t i = start;
455 while ((i = input.find(' ', i + 1)) != input.npos) {
456 // Validate the assumption that there aren't any contiguous spaces
457 // in |input| before utime.
458 DCHECK_NE(input[i - 1], ' ');
459 if (--num_spaces_remaining == 0) {
460 int utime = 0;
461 int stime = 0;
462 if (sscanf(&input.data()[i], "%d %d", &utime, &stime) != 2)
463 return -1;
464
465 return utime + stime;
466 }
467 }
468
469 return -1;
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]470}
471
jwmak@chromium.org103ff3512013-08-22 07:19:30[diff] [blame]472const char kProcSelfExe[] = "/proc/self/exe";
473
474int GetNumberOfThreads(ProcessHandle process) {
sheu@chromium.orga98084792014-01-09 01:39:24[diff] [blame]475 return internal::ReadProcStatsAndGetFieldAsInt64(process,
476 internal::VM_NUMTHREADS);
jwmak@chromium.org103ff3512013-08-22 07:19:30[diff] [blame]477}
478
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]479namespace {
480
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]481// The format of /proc/diskstats is:
482// Device major number
483// Device minor number
484// Device name
485// Field 1 -- # of reads completed
486// This is the total number of reads completed successfully.
487// Field 2 -- # of reads merged, field 6 -- # of writes merged
488// Reads and writes which are adjacent to each other may be merged for
489// efficiency. Thus two 4K reads may become one 8K read before it is
490// ultimately handed to the disk, and so it will be counted (and queued)
491// as only one I/O. This field lets you know how often this was done.
492// Field 3 -- # of sectors read
493// This is the total number of sectors read successfully.
494// Field 4 -- # of milliseconds spent reading
495// This is the total number of milliseconds spent by all reads (as
496// measured from __make_request() to end_that_request_last()).
497// Field 5 -- # of writes completed
498// This is the total number of writes completed successfully.
499// Field 6 -- # of writes merged
500// See the description of field 2.
501// Field 7 -- # of sectors written
502// This is the total number of sectors written successfully.
503// Field 8 -- # of milliseconds spent writing
504// This is the total number of milliseconds spent by all writes (as
505// measured from __make_request() to end_that_request_last()).
506// Field 9 -- # of I/Os currently in progress
507// The only field that should go to zero. Incremented as requests are
508// given to appropriate struct request_queue and decremented as they
509// finish.
510// Field 10 -- # of milliseconds spent doing I/Os
511// This field increases so long as field 9 is nonzero.
512// Field 11 -- weighted # of milliseconds spent doing I/Os
513// This field is incremented at each I/O start, I/O completion, I/O
514// merge, or read of these stats by the number of I/Os in progress
515// (field 9) times the number of milliseconds spent doing I/O since the
516// last update of this field. This can provide an easy measure of both
517// I/O completion time and the backlog that may be accumulating.
518
519const size_t kDiskDriveName = 2;
520const size_t kDiskReads = 3;
521const size_t kDiskReadsMerged = 4;
522const size_t kDiskSectorsRead = 5;
523const size_t kDiskReadTime = 6;
524const size_t kDiskWrites = 7;
525const size_t kDiskWritesMerged = 8;
526const size_t kDiskSectorsWritten = 9;
527const size_t kDiskWriteTime = 10;
528const size_t kDiskIO = 11;
529const size_t kDiskIOTime = 12;
530const size_t kDiskWeightedIOTime = 13;
531
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]532} // namespace
533
jwmak@chromium.org49b0cf82013-09-03 23:46:54[diff] [blame]534SystemMemoryInfoKB::SystemMemoryInfoKB() {
535 total = 0;
536 free = 0;
537 buffers = 0;
538 cached = 0;
539 active_anon = 0;
540 inactive_anon = 0;
541 active_file = 0;
542 inactive_file = 0;
543 swap_total = 0;
544 swap_free = 0;
545 dirty = 0;
546
547 pswpin = 0;
548 pswpout = 0;
549 pgmajfault = 0;
550
551#ifdef OS_CHROMEOS
552 shmem = 0;
553 slab = 0;
554 gem_objects = -1;
555 gem_size = -1;
556#endif
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]557}
558
vmpstr7c7877062016-02-18 22:12:24[diff] [blame^]559SystemMemoryInfoKB::SystemMemoryInfoKB(const SystemMemoryInfoKB& other) =
560 default;
561
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]562scoped_ptr<Value> SystemMemoryInfoKB::ToValue() const {
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]563 scoped_ptr<DictionaryValue> res(new DictionaryValue());
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]564
565 res->SetInteger("total", total);
566 res->SetInteger("free", free);
567 res->SetInteger("buffers", buffers);
568 res->SetInteger("cached", cached);
569 res->SetInteger("active_anon", active_anon);
570 res->SetInteger("inactive_anon", inactive_anon);
571 res->SetInteger("active_file", active_file);
572 res->SetInteger("inactive_file", inactive_file);
573 res->SetInteger("swap_total", swap_total);
574 res->SetInteger("swap_free", swap_free);
575 res->SetInteger("swap_used", swap_total - swap_free);
576 res->SetInteger("dirty", dirty);
577 res->SetInteger("pswpin", pswpin);
578 res->SetInteger("pswpout", pswpout);
579 res->SetInteger("pgmajfault", pgmajfault);
580#ifdef OS_CHROMEOS
581 res->SetInteger("shmem", shmem);
582 res->SetInteger("slab", slab);
583 res->SetInteger("gem_objects", gem_objects);
584 res->SetInteger("gem_size", gem_size);
585#endif
586
danakj0c8d4aa2015-11-25 05:29:58[diff] [blame]587 return std::move(res);
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]588}
589
davemoore@chromium.org70baebc2013-11-02 16:58:44[diff] [blame]590// exposed for testing
591bool ParseProcMeminfo(const std::string& meminfo_data,
592 SystemMemoryInfoKB* meminfo) {
sonnyrao@chromium.orgded8c42b2013-11-05 22:15:03[diff] [blame]593 // The format of /proc/meminfo is:
594 //
595 // MemTotal: 8235324 kB
596 // MemFree: 1628304 kB
597 // Buffers: 429596 kB
598 // Cached: 4728232 kB
599 // ...
600 // There is no guarantee on the ordering or position
601 // though it doesn't appear to change very often
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]602
sonnyrao@chromium.orgded8c42b2013-11-05 22:15:03[diff] [blame]603 // As a basic sanity check, let's make sure we at least get non-zero
604 // MemTotal value
605 meminfo->total = 0;
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]606
brettw37fd9d7d2015-06-24 02:07:16[diff] [blame]607 for (const StringPiece& line : SplitStringPiece(
608 meminfo_data, "\n", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY)) {
609 std::vector<StringPiece> tokens = SplitStringPiece(
610 line, kWhitespaceASCII, TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
sonnyrao@chromium.orgded8c42b2013-11-05 22:15:03[diff] [blame]611 // HugePages_* only has a number and no suffix so we can't rely on
612 // there being exactly 3 tokens.
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]613 if (tokens.size() <= 1) {
sonnyrao@chromium.orgded8c42b2013-11-05 22:15:03[diff] [blame]614 DLOG(WARNING) << "meminfo: tokens: " << tokens.size()
brettw37fd9d7d2015-06-24 02:07:16[diff] [blame]615 << " malformed line: " << line.as_string();
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]616 continue;
617 }
618
619 int* target = NULL;
620 if (tokens[0] == "MemTotal:")
621 target = &meminfo->total;
622 else if (tokens[0] == "MemFree:")
623 target = &meminfo->free;
624 else if (tokens[0] == "Buffers:")
625 target = &meminfo->buffers;
626 else if (tokens[0] == "Cached:")
627 target = &meminfo->cached;
628 else if (tokens[0] == "Active(anon):")
629 target = &meminfo->active_anon;
630 else if (tokens[0] == "Inactive(anon):")
631 target = &meminfo->inactive_anon;
632 else if (tokens[0] == "Active(file):")
633 target = &meminfo->active_file;
634 else if (tokens[0] == "Inactive(file):")
635 target = &meminfo->inactive_file;
636 else if (tokens[0] == "SwapTotal:")
637 target = &meminfo->swap_total;
638 else if (tokens[0] == "SwapFree:")
639 target = &meminfo->swap_free;
640 else if (tokens[0] == "Dirty:")
641 target = &meminfo->dirty;
642#if defined(OS_CHROMEOS)
643 // Chrome OS has a tweaked kernel that allows us to query Shmem, which is
644 // usually video memory otherwise invisible to the OS.
645 else if (tokens[0] == "Shmem:")
646 target = &meminfo->shmem;
647 else if (tokens[0] == "Slab:")
648 target = &meminfo->slab;
649#endif
650 if (target)
651 StringToInt(tokens[1], target);
sonnyrao@chromium.orgded8c42b2013-11-05 22:15:03[diff] [blame]652 }
653
654 // Make sure we got a valid MemTotal.
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]655 return meminfo->total > 0;
davemoore@chromium.org70baebc2013-11-02 16:58:44[diff] [blame]656}
657
658// exposed for testing
659bool ParseProcVmstat(const std::string& vmstat_data,
660 SystemMemoryInfoKB* meminfo) {
sonnyrao@chromium.orgded8c42b2013-11-05 22:15:03[diff] [blame]661 // The format of /proc/vmstat is:
662 //
663 // nr_free_pages 299878
664 // nr_inactive_anon 239863
665 // nr_active_anon 1318966
666 // nr_inactive_file 2015629
667 // ...
668 //
669 // We iterate through the whole file because the position of the
670 // fields are dependent on the kernel version and configuration.
671
brettw37fd9d7d2015-06-24 02:07:16[diff] [blame]672 for (const StringPiece& line : SplitStringPiece(
673 vmstat_data, "\n", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY)) {
674 std::vector<StringPiece> tokens = SplitStringPiece(
675 line, " ", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY);
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]676 if (tokens.size() != 2)
677 continue;
678
679 if (tokens[0] == "pswpin") {
680 StringToInt(tokens[1], &meminfo->pswpin);
681 } else if (tokens[0] == "pswpout") {
682 StringToInt(tokens[1], &meminfo->pswpout);
683 } else if (tokens[0] == "pgmajfault") {
684 StringToInt(tokens[1], &meminfo->pgmajfault);
sonnyrao@chromium.orgded8c42b2013-11-05 22:15:03[diff] [blame]685 }
686 }
davemoore@chromium.org70baebc2013-11-02 16:58:44[diff] [blame]687
688 return true;
689}
690
691bool GetSystemMemoryInfo(SystemMemoryInfoKB* meminfo) {
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]692 // Synchronously reading files in /proc and /sys are safe.
davemoore@chromium.org70baebc2013-11-02 16:58:44[diff] [blame]693 ThreadRestrictions::ScopedAllowIO allow_io;
694
695 // Used memory is: total - free - buffers - caches
696 FilePath meminfo_file("/proc/meminfo");
697 std::string meminfo_data;
698 if (!ReadFileToString(meminfo_file, &meminfo_data)) {
699 DLOG(WARNING) << "Failed to open " << meminfo_file.value();
700 return false;
701 }
702
703 if (!ParseProcMeminfo(meminfo_data, meminfo)) {
704 DLOG(WARNING) << "Failed to parse " << meminfo_file.value();
705 return false;
706 }
707
708#if defined(OS_CHROMEOS)
hashimotof3e19a52015-04-17 20:30:35[diff] [blame]709 // Report on Chrome OS GEM object graphics memory. /run/debugfs_gpu is a
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]710 // bind mount into /sys/kernel/debug and synchronously reading the in-memory
711 // files in /sys is fast.
712#if defined(ARCH_CPU_ARM_FAMILY)
hashimotof3e19a52015-04-17 20:30:35[diff] [blame]713 FilePath geminfo_file("/run/debugfs_gpu/exynos_gem_objects");
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]714#else
hashimotof3e19a52015-04-17 20:30:35[diff] [blame]715 FilePath geminfo_file("/run/debugfs_gpu/i915_gem_objects");
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]716#endif
717 std::string geminfo_data;
718 meminfo->gem_objects = -1;
719 meminfo->gem_size = -1;
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]720 if (ReadFileToString(geminfo_file, &geminfo_data)) {
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]721 int gem_objects = -1;
722 long long gem_size = -1;
723 int num_res = sscanf(geminfo_data.c_str(),
724 "%d objects, %lld bytes",
725 &gem_objects, &gem_size);
726 if (num_res == 2) {
727 meminfo->gem_objects = gem_objects;
728 meminfo->gem_size = gem_size;
729 }
730 }
731
732#if defined(ARCH_CPU_ARM_FAMILY)
733 // Incorporate Mali graphics memory if present.
dbehr@chromium.orgdc5f8fd2013-09-04 04:07:27[diff] [blame]734 FilePath mali_memory_file("/sys/class/misc/mali0/device/memory");
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]735 std::string mali_memory_data;
brettw@chromium.org82f84b92013-08-30 18:23:50[diff] [blame]736 if (ReadFileToString(mali_memory_file, &mali_memory_data)) {
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]737 long long mali_size = -1;
738 int num_res = sscanf(mali_memory_data.c_str(), "%lld bytes", &mali_size);
739 if (num_res == 1)
740 meminfo->gem_size += mali_size;
741 }
742#endif // defined(ARCH_CPU_ARM_FAMILY)
743#endif // defined(OS_CHROMEOS)
744
jwmak@chromium.org49b0cf82013-09-03 23:46:54[diff] [blame]745 FilePath vmstat_file("/proc/vmstat");
746 std::string vmstat_data;
747 if (!ReadFileToString(vmstat_file, &vmstat_data)) {
748 DLOG(WARNING) << "Failed to open " << vmstat_file.value();
749 return false;
750 }
davemoore@chromium.org70baebc2013-11-02 16:58:44[diff] [blame]751 if (!ParseProcVmstat(vmstat_data, meminfo)) {
752 DLOG(WARNING) << "Failed to parse " << vmstat_file.value();
753 return false;
754 }
jwmak@chromium.org49b0cf82013-09-03 23:46:54[diff] [blame]755
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]756 return true;
rsesek@chromium.org992a60652013-07-15 18:29:35[diff] [blame]757}
758
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]759SystemDiskInfo::SystemDiskInfo() {
760 reads = 0;
761 reads_merged = 0;
762 sectors_read = 0;
763 read_time = 0;
764 writes = 0;
765 writes_merged = 0;
766 sectors_written = 0;
767 write_time = 0;
768 io = 0;
769 io_time = 0;
770 weighted_io_time = 0;
771}
772
vmpstr7c7877062016-02-18 22:12:24[diff] [blame^]773SystemDiskInfo::SystemDiskInfo(const SystemDiskInfo& other) = default;
774
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]775scoped_ptr<Value> SystemDiskInfo::ToValue() const {
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]776 scoped_ptr<DictionaryValue> res(new DictionaryValue());
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]777
avibeced7c2015-12-24 06:47:59[diff] [blame]778 // Write out uint64_t variables as doubles.
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]779 // Note: this may discard some precision, but for JS there's no other option.
780 res->SetDouble("reads", static_cast<double>(reads));
781 res->SetDouble("reads_merged", static_cast<double>(reads_merged));
782 res->SetDouble("sectors_read", static_cast<double>(sectors_read));
783 res->SetDouble("read_time", static_cast<double>(read_time));
784 res->SetDouble("writes", static_cast<double>(writes));
785 res->SetDouble("writes_merged", static_cast<double>(writes_merged));
786 res->SetDouble("sectors_written", static_cast<double>(sectors_written));
787 res->SetDouble("write_time", static_cast<double>(write_time));
788 res->SetDouble("io", static_cast<double>(io));
789 res->SetDouble("io_time", static_cast<double>(io_time));
790 res->SetDouble("weighted_io_time", static_cast<double>(weighted_io_time));
791
danakj0c8d4aa2015-11-25 05:29:58[diff] [blame]792 return std::move(res);
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]793}
794
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]795bool IsValidDiskName(const std::string& candidate) {
796 if (candidate.length() < 3)
797 return false;
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]798 if (candidate[1] == 'd' &&
799 (candidate[0] == 'h' || candidate[0] == 's' || candidate[0] == 'v')) {
800 // [hsv]d[a-z]+ case
801 for (size_t i = 2; i < candidate.length(); ++i) {
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]802 if (!islower(candidate[i]))
803 return false;
804 }
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]805 return true;
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]806 }
807
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]808 const char kMMCName[] = "mmcblk";
809 const size_t kMMCNameLen = strlen(kMMCName);
810 if (candidate.length() < kMMCNameLen + 1)
811 return false;
812 if (candidate.compare(0, kMMCNameLen, kMMCName) != 0)
813 return false;
814
815 // mmcblk[0-9]+ case
816 for (size_t i = kMMCNameLen; i < candidate.length(); ++i) {
817 if (!isdigit(candidate[i]))
818 return false;
819 }
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]820 return true;
821}
822
823bool GetSystemDiskInfo(SystemDiskInfo* diskinfo) {
thestig75844fdb2014-09-09 19:47:10[diff] [blame]824 // Synchronously reading files in /proc does not hit the disk.
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]825 ThreadRestrictions::ScopedAllowIO allow_io;
826
827 FilePath diskinfo_file("/proc/diskstats");
828 std::string diskinfo_data;
829 if (!ReadFileToString(diskinfo_file, &diskinfo_data)) {
830 DLOG(WARNING) << "Failed to open " << diskinfo_file.value();
831 return false;
832 }
833
brettw37fd9d7d2015-06-24 02:07:16[diff] [blame]834 std::vector<StringPiece> diskinfo_lines = SplitStringPiece(
835 diskinfo_data, "\n", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY);
836 if (diskinfo_lines.size() == 0) {
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]837 DLOG(WARNING) << "No lines found";
838 return false;
839 }
840
841 diskinfo->reads = 0;
842 diskinfo->reads_merged = 0;
843 diskinfo->sectors_read = 0;
844 diskinfo->read_time = 0;
845 diskinfo->writes = 0;
846 diskinfo->writes_merged = 0;
847 diskinfo->sectors_written = 0;
848 diskinfo->write_time = 0;
849 diskinfo->io = 0;
850 diskinfo->io_time = 0;
851 diskinfo->weighted_io_time = 0;
852
avibeced7c2015-12-24 06:47:59[diff] [blame]853 uint64_t reads = 0;
854 uint64_t reads_merged = 0;
855 uint64_t sectors_read = 0;
856 uint64_t read_time = 0;
857 uint64_t writes = 0;
858 uint64_t writes_merged = 0;
859 uint64_t sectors_written = 0;
860 uint64_t write_time = 0;
861 uint64_t io = 0;
862 uint64_t io_time = 0;
863 uint64_t weighted_io_time = 0;
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]864
brettw37fd9d7d2015-06-24 02:07:16[diff] [blame]865 for (const StringPiece& line : diskinfo_lines) {
866 std::vector<StringPiece> disk_fields = SplitStringPiece(
867 line, kWhitespaceASCII, TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]868
869 // Fields may have overflowed and reset to zero.
brettw37fd9d7d2015-06-24 02:07:16[diff] [blame]870 if (IsValidDiskName(disk_fields[kDiskDriveName].as_string())) {
nduca@chromium.org669a09332013-08-30 22:59:14[diff] [blame]871 StringToUint64(disk_fields[kDiskReads], &reads);
872 StringToUint64(disk_fields[kDiskReadsMerged], &reads_merged);
873 StringToUint64(disk_fields[kDiskSectorsRead], &sectors_read);
874 StringToUint64(disk_fields[kDiskReadTime], &read_time);
875 StringToUint64(disk_fields[kDiskWrites], &writes);
876 StringToUint64(disk_fields[kDiskWritesMerged], &writes_merged);
877 StringToUint64(disk_fields[kDiskSectorsWritten], &sectors_written);
878 StringToUint64(disk_fields[kDiskWriteTime], &write_time);
879 StringToUint64(disk_fields[kDiskIO], &io);
880 StringToUint64(disk_fields[kDiskIOTime], &io_time);
881 StringToUint64(disk_fields[kDiskWeightedIOTime], &weighted_io_time);
882
883 diskinfo->reads += reads;
884 diskinfo->reads_merged += reads_merged;
885 diskinfo->sectors_read += sectors_read;
886 diskinfo->read_time += read_time;
887 diskinfo->writes += writes;
888 diskinfo->writes_merged += writes_merged;
889 diskinfo->sectors_written += sectors_written;
890 diskinfo->write_time += write_time;
891 diskinfo->io += io;
892 diskinfo->io_time += io_time;
893 diskinfo->weighted_io_time += weighted_io_time;
894 }
895 }
896
897 return true;
898}
899
nduca@chromium.orgf4134782013-08-29 21:25:20[diff] [blame]900#if defined(OS_CHROMEOS)
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]901scoped_ptr<Value> SwapInfo::ToValue() const {
902 scoped_ptr<DictionaryValue> res(new DictionaryValue());
903
avibeced7c2015-12-24 06:47:59[diff] [blame]904 // Write out uint64_t variables as doubles.
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]905 // Note: this may discard some precision, but for JS there's no other option.
906 res->SetDouble("num_reads", static_cast<double>(num_reads));
907 res->SetDouble("num_writes", static_cast<double>(num_writes));
908 res->SetDouble("orig_data_size", static_cast<double>(orig_data_size));
909 res->SetDouble("compr_data_size", static_cast<double>(compr_data_size));
910 res->SetDouble("mem_used_total", static_cast<double>(mem_used_total));
911 if (compr_data_size > 0)
912 res->SetDouble("compression_ratio", static_cast<double>(orig_data_size) /
913 static_cast<double>(compr_data_size));
914 else
915 res->SetDouble("compression_ratio", 0);
916
danakj0c8d4aa2015-11-25 05:29:58[diff] [blame]917 return std::move(res);
jwmak@chromium.orgc2ef94e2013-09-06 13:13:23[diff] [blame]918}
919
nduca@chromium.orgf4134782013-08-29 21:25:20[diff] [blame]920void GetSwapInfo(SwapInfo* swap_info) {
thestig75844fdb2014-09-09 19:47:10[diff] [blame]921 // Synchronously reading files in /sys/block/zram0 does not hit the disk.
nduca@chromium.orgf4134782013-08-29 21:25:20[diff] [blame]922 ThreadRestrictions::ScopedAllowIO allow_io;
923
thestiga0d051ed2014-09-08 21:41:17[diff] [blame]924 FilePath zram_path("/sys/block/zram0");
avibeced7c2015-12-24 06:47:59[diff] [blame]925 uint64_t orig_data_size =
926 ReadFileToUint64(zram_path.Append("orig_data_size"));
nduca@chromium.orgf4134782013-08-29 21:25:20[diff] [blame]927 if (orig_data_size <= 4096) {
928 // A single page is compressed at startup, and has a high compression
929 // ratio. We ignore this as it doesn't indicate any real swapping.
930 swap_info->orig_data_size = 0;
931 swap_info->num_reads = 0;
932 swap_info->num_writes = 0;
933 swap_info->compr_data_size = 0;
934 swap_info->mem_used_total = 0;
935 return;
936 }
937 swap_info->orig_data_size = orig_data_size;
938 swap_info->num_reads = ReadFileToUint64(zram_path.Append("num_reads"));
939 swap_info->num_writes = ReadFileToUint64(zram_path.Append("num_writes"));
940 swap_info->compr_data_size =
941 ReadFileToUint64(zram_path.Append("compr_data_size"));
942 swap_info->mem_used_total =
943 ReadFileToUint64(zram_path.Append("mem_used_total"));
944}
945#endif // defined(OS_CHROMEOS)
946
thestig75844fdb2014-09-09 19:47:10[diff] [blame]947#if defined(OS_LINUX)
948int ProcessMetrics::GetIdleWakeupsPerSecond() {
avibeced7c2015-12-24 06:47:59[diff] [blame]949 uint64_t wake_ups;
thestig75844fdb2014-09-09 19:47:10[diff] [blame]950 const char kWakeupStat[] = "se.statistics.nr_wakeups";
951 return ReadProcSchedAndGetFieldAsUint64(process_, kWakeupStat, &wake_ups) ?
952 CalculateIdleWakeupsPerSecond(wake_ups) : 0;
953}
954#endif // defined(OS_LINUX)
955
rsesek@chromium.org32f5e9a2013-05-23 12:59:54[diff] [blame]956} // namespace base