-
Notifications
You must be signed in to change notification settings - Fork 120
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add CPU usage tracking specifically for 24.
b/341774149
- Loading branch information
1 parent
f514f84
commit fc23126
Showing
16 changed files
with
1,252 additions
and
2 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,182 @@ | ||
// Copyright 2024 The Cobalt Authors. All Rights Reserved. | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
|
||
#include "cobalt/base/process/process_metrics_helper.h" | ||
|
||
#include <atomic> | ||
#include <cmath> | ||
#include <memory> | ||
#include <string> | ||
#include <utility> | ||
#include <vector> | ||
|
||
#include "base/bind.h" | ||
#include "base/files/file_enumerator.h" | ||
#include "base/files/file_path.h" | ||
#include "base/files/file_util.h" | ||
#include "base/memory/ptr_util.h" | ||
#include "base/optional.h" | ||
#include "base/process/internal_linux.h" | ||
#include "base/strings/string_number_conversions.h" | ||
#include "base/strings/string_split.h" | ||
#include "base/strings/string_util.h" | ||
#include "base/time/time.h" | ||
|
||
namespace base { | ||
|
||
namespace { | ||
|
||
static std::atomic<int> clock_ticks_per_s{0}; | ||
|
||
ProcessMetricsHelper::ReadCallback GetReadCallback(const FilePath& path) { | ||
return BindOnce( | ||
[](const FilePath& path) -> Optional<std::string> { | ||
std::string contents; | ||
if (!ReadFileToString(path, &contents)) return nullopt; | ||
return contents; | ||
}, | ||
path); | ||
} | ||
|
||
double CalculateCPUUsageSeconds(const std::string& utime_string, | ||
const std::string& stime_string, | ||
int ticks_per_s) { | ||
DCHECK_NE(ticks_per_s, 0); | ||
double utime; | ||
if (!StringToDouble(utime_string, &utime)) return 0.0; | ||
double stime; | ||
if (!StringToDouble(stime_string, &stime)) return 0.0; | ||
return (utime + stime) / static_cast<double>(ticks_per_s); | ||
} | ||
|
||
} // namespace | ||
|
||
// static | ||
int ProcessMetricsHelper::GetClockTicksPerS() { | ||
return clock_ticks_per_s.load(); | ||
} | ||
|
||
// static | ||
int ProcessMetricsHelper::GetClockTicksPerS(ReadCallback uptime_callback, | ||
ReadCallback stat_callback) { | ||
double current_uptime = 0.0; | ||
{ | ||
auto uptime_contents = std::move(uptime_callback).Run(); | ||
if (!uptime_contents) return 0; | ||
auto parts = SplitString(*uptime_contents, " ", TRIM_WHITESPACE, | ||
SPLIT_WANT_NONEMPTY); | ||
if (parts.size() == 0 || !StringToDouble(parts[0], ¤t_uptime) || | ||
current_uptime == 0.0) { | ||
return 0; | ||
} | ||
} | ||
|
||
auto fields = GetProcStatFields(std::move(stat_callback), | ||
{internal::ProcStatsFields::VM_STARTTIME}); | ||
if (fields.size() != 1) return 0; | ||
double process_starttime; | ||
if (!StringToDouble(fields[0], &process_starttime) || | ||
process_starttime == 0.0) | ||
return 0; | ||
double ticks_per_s = process_starttime / current_uptime; | ||
int rounded_up = 10 * static_cast<int>(std::ceil(ticks_per_s / 10.0)); | ||
return rounded_up; | ||
} | ||
|
||
// static | ||
void ProcessMetricsHelper::PopulateClockTicksPerS() { | ||
DCHECK_EQ(clock_ticks_per_s.load(), 0); | ||
clock_ticks_per_s.store( | ||
GetClockTicksPerS(GetReadCallback(FilePath("/proc/uptime")), | ||
GetReadCallback(FilePath("/proc/self/stat")))); | ||
} | ||
|
||
// static | ||
TimeDelta ProcessMetricsHelper::GetCumulativeCPUUsage() { | ||
int ticks_per_s = clock_ticks_per_s.load(); | ||
if (ticks_per_s == 0) return TimeDelta(); | ||
return GetCPUUsage(FilePath("/proc/self"), ticks_per_s); | ||
} | ||
|
||
// static | ||
Value ProcessMetricsHelper::GetCumulativeCPUUsagePerThread() { | ||
int ticks_per_s = clock_ticks_per_s.load(); | ||
if (ticks_per_s == 0) return Value(); | ||
ListValue cpu_per_thread; | ||
FileEnumerator file_enum(FilePath("/proc/self/task"), /*recursive=*/false, | ||
FileEnumerator::DIRECTORIES); | ||
for (FilePath path = file_enum.Next(); !path.empty(); | ||
path = file_enum.Next()) { | ||
Fields fields = | ||
GetProcStatFields(path, {0, internal::ProcStatsFields::VM_COMM, | ||
internal::ProcStatsFields::VM_UTIME, | ||
internal::ProcStatsFields::VM_STIME}); | ||
if (fields.size() != 4) continue; | ||
int id; | ||
if (!StringToInt(fields[0], &id)) continue; | ||
DictionaryValue entry; | ||
entry.SetKey("id", Value(id)); | ||
entry.SetKey("name", Value(fields[1])); | ||
entry.SetKey("utime", Value(fields[2])); | ||
entry.SetKey("stime", Value(fields[3])); | ||
entry.SetKey("usage_seconds", Value(CalculateCPUUsageSeconds( | ||
fields[2], fields[3], ticks_per_s))); | ||
cpu_per_thread.GetList().push_back(std::move(entry)); | ||
} | ||
return std::move(cpu_per_thread); | ||
} | ||
|
||
// static | ||
ProcessMetricsHelper::Fields ProcessMetricsHelper::GetProcStatFields( | ||
ReadCallback read_callback, std::initializer_list<int> indices) { | ||
auto contents = std::move(read_callback).Run(); | ||
if (!contents) return Fields(); | ||
|
||
std::vector<std::string> proc_stats; | ||
if (!internal::ParseProcStats(*contents, &proc_stats)) return Fields(); | ||
|
||
Fields fields; | ||
for (int index : indices) { | ||
if (index < 0 || index >= proc_stats.size()) return Fields(); | ||
fields.push_back(std::move(proc_stats[index])); | ||
} | ||
return std::move(fields); | ||
} | ||
|
||
// static | ||
ProcessMetricsHelper::Fields ProcessMetricsHelper::GetProcStatFields( | ||
const FilePath& path, std::initializer_list<int> indices) { | ||
return ProcessMetricsHelper::GetProcStatFields( | ||
GetReadCallback(path.Append("stat")), indices); | ||
} | ||
|
||
// static | ||
TimeDelta ProcessMetricsHelper::GetCPUUsage(ReadCallback read_callback, | ||
int ticks_per_s) { | ||
auto fields = ProcessMetricsHelper::GetProcStatFields( | ||
std::move(read_callback), {internal::ProcStatsFields::VM_UTIME, | ||
internal::ProcStatsFields::VM_STIME}); | ||
if (fields.size() != 2) return TimeDelta(); | ||
return TimeDelta::FromSecondsD( | ||
CalculateCPUUsageSeconds(fields[0], fields[1], ticks_per_s)); | ||
} | ||
|
||
// static | ||
TimeDelta ProcessMetricsHelper::GetCPUUsage(const FilePath& path, | ||
int ticks_per_s) { | ||
return ProcessMetricsHelper::GetCPUUsage(GetReadCallback(path.Append("stat")), | ||
ticks_per_s); | ||
} | ||
|
||
} // namespace base |
Oops, something went wrong.