Определить загруженность ядер процессора

SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION ProcessorInfo[MAX_PROCESSOR];
NTSTATUS Status;
Status =NtQuerySystemInformation(
SystemProcessorPerformanceInformation,
ProcessorInfo,
sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) * MAX_PROCESSOR,
NULL
);

#include <iostream>
#include <windows.h>
using namespace std;
 
ULONGLONG ft2ull(FILETIME &ft) {
    ULARGE_INTEGER ul;
    ul.HighPart = ft.dwHighDateTime;
    ul.LowPart = ft.dwLowDateTime;
    return ul.QuadPart;
}
 
int main() {
    FILETIME idle, prev_idle;
    FILETIME kernel, prev_kernel;
    FILETIME user, prev_user;
    GetSystemTimes(&prev_idle, &prev_kernel, &prev_user);
    Sleep(1000);
    while (true) {
        GetSystemTimes(&idle, &kernel, &user);
        ULONGLONG sys = (ft2ull(user) - ft2ull(prev_user)) +
            (ft2ull(kernel) - ft2ull(prev_kernel));
        cout << int((sys - ft2ull(idle) + ft2ull(prev_idle)) * 100.0 / sys) << "%" << endl;
        prev_idle = idle;
        prev_kernel = kernel;
        prev_user = user;
        Sleep(1000);
    }
}