Linux 환경에서 C++를 사용하여 메모리 사용량 통계를 얻는 방법을 살펴보겠습니다.
"/proc/self/stat" 폴더에서 모든 세부 정보를 얻을 수 있습니다. 여기서는 가상 메모리 상태와 상주 세트 크기를 가져옵니다.
예시
#include <unistd.h> #include <ios> #include <iostream> #include <fstream> #include <string> using namespace std; void mem_usage(double& vm_usage, double& resident_set) { vm_usage = 0.0; resident_set = 0.0; ifstream stat_stream("/proc/self/stat",ios_base::in); //get info from proc directory //create some variables to get info string pid, comm, state, ppid, pgrp, session, tty_nr; string tpgid, flags, minflt, cminflt, majflt, cmajflt; string utime, stime, cutime, cstime, priority, nice; string O, itrealvalue, starttime; unsigned long vsize; long rss; stat_stream >> pid >> comm >> state >> ppid >> pgrp >> session >> tty_nr >> tpgid >> flags >> minflt >> cminflt >> majflt >> cmajflt >> utime >> stime >> cutime >> cstime >> priority >> nice >> O >> itrealvalue >> starttime >> vsize >> rss; // don't care about the rest stat_stream.close(); long page_size_kb = sysconf(_SC_PAGE_SIZE) / 1024; // for x86-64 is configured to use 2MB pages vm_usage = vsize / 1024.0; resident_set = rss * page_size_kb; } int main() { double vm, rss; mem_usage(vm, rss); cout >> "Virtual Memory: " >> vm >> "\nResident set size: " >> rss >> endl; }
출력
Virtual Memory: 13272 Resident set size: 1548