Bind process to cpu #45
Open
Conversation
This file contains hidden or 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
AndrewGavril
requested changes
Apr 30, 2025
Comment on lines
+3
to
+103
| #include <fstream> | ||
| #include <sstream> | ||
| #include <cstring> | ||
| #include <thread> | ||
| #include <chrono> | ||
| #include <unistd.h> | ||
| #include <sched.h> | ||
|
|
||
| std::vector<float> getCoreLoads() { | ||
| std::vector<float> loads; | ||
| std::ifstream stat("/proc/stat"); | ||
|
|
||
| if (!stat.is_open()) { | ||
| std::cerr << "Failed to open /proc/stat" << std::endl; | ||
| return loads; | ||
| } | ||
|
|
||
| // Pass 1st string (with total cpu data) | ||
| std::string line; | ||
| std::getline(stat, line); | ||
|
|
||
| // Read each cpu data | ||
| std::vector<std::vector<unsigned long long>> prevCpuData; | ||
| while (std::getline(stat, line)) { | ||
| if (line.find("cpu") == 0) { | ||
| std::istringstream stream(line); | ||
| std::string cpuString; | ||
| stream >> cpuString; | ||
| if (cpuString.substr(0, 3) != "cpu") break; | ||
|
|
||
| std::vector<unsigned long long> coreData; | ||
| unsigned long long value; | ||
| while (stream >> value) { | ||
| coreData.push_back(value); | ||
| } | ||
| prevCpuData.push_back(coreData); | ||
| } | ||
| } | ||
| stat.close(); | ||
|
|
||
| // Wait for some time | ||
| std::this_thread::sleep_for(std::chrono::milliseconds(500)); | ||
|
|
||
| stat.open("/proc/stat"); | ||
| std::getline(stat, line); // Pass 1st string | ||
|
|
||
| std::vector<std::vector<unsigned long long>> currCpuData; | ||
| for (size_t i = 0; i < prevCpuData.size(); ++i) { | ||
| std::getline(stat, line); | ||
| std::istringstream stream(line); | ||
| std::string cpuString; | ||
| stream >> cpuString; | ||
|
|
||
| std::vector<unsigned long long> coreData; | ||
| unsigned long long value; | ||
| while (stream >> value) { | ||
| coreData.push_back(value); | ||
| } | ||
| currCpuData.push_back(coreData); | ||
| } | ||
| stat.close(); | ||
|
|
||
| // Calculate load for all cpus | ||
| for (size_t i = 0; i < prevCpuData.size(); ++i) { | ||
| unsigned long long prevIdle = prevCpuData[i][3] + prevCpuData[i][4]; | ||
| unsigned long long currIdle = currCpuData[i][3] + currCpuData[i][4]; | ||
|
|
||
| unsigned long long prevTotal = 0; | ||
|
|
||
| for(int j = 0; j < prevCpuData[i].size(); j++) { | ||
| prevTotal += prevCpuData[i][j]; | ||
| } | ||
|
|
||
| unsigned long long currTotal = 0; | ||
|
|
||
| for(int j = 0; j < currCpuData[i].size(); j++) { | ||
| currTotal += currCpuData[i][j]; | ||
| } | ||
|
|
||
| unsigned long long totalDiff = currTotal - prevTotal; | ||
| unsigned long long idleDiff = currIdle - prevIdle; | ||
|
|
||
| float usage = 100.0f * (totalDiff - idleDiff) / totalDiff; | ||
| loads.push_back(usage); | ||
| } | ||
|
|
||
| return loads; | ||
| } | ||
|
|
||
| bool bindProcessToCore(pid_t pid, int core) { | ||
| cpu_set_t cpuset; | ||
| CPU_ZERO(&cpuset); | ||
| CPU_SET(core, &cpuset); | ||
|
|
||
| if (sched_setaffinity(pid, sizeof(cpu_set_t), &cpuset) != 0) { | ||
| std::cerr << "Failed to bind process to cpu: " << strerror(errno) << std::endl; | ||
| return false; | ||
| } | ||
| return true; | ||
| } |
There was a problem hiding this comment.
Почему бы просто не использовать: https://docs.docker.com/reference/compose-file/services/#cpu_count? Мне кажется, что это лишняя логика для решения задачи
| try { | ||
| std::string hash = File::calculate_hash(argv[1], argv[2]); | ||
| std::cout << "Digest is: " << hash << std::endl; | ||
| } catch (const std::exception &e) { | ||
| std::cerr << "Error: " << e.what() << std::endl; | ||
| return 1; | ||
| return 4; |
There was a problem hiding this comment.
Давайте введем нумерацию ошибок или будем использовать стандартную со знаком "-". https://docs.particle.io/reference/device-os/api/debugging/posix-errors/
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.