我一直在使用以下方法来获取整个计算机的当前 CPU 利用率:
HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
//Use a simple infinite loop to display the concept
for(;; ::Sleep(500))
{
COORD coord = {0, 0};
SetConsoleCursorPosition(hOut, coord);
int nCpuUse = get_cpu_utilization_method_01();
_tprintf(L"CPU Usage: %d\t", nCpuUse);
}
int get_cpu_utilization_method_01()
{
int nRes = -1;
FILETIME ftIdle, ftKrnl, ftUsr;
if(GetSystemTimes(&ftIdle, &ftKrnl, &ftUsr))
{
static BOOL bUsedOnce = FALSE;
static ULONGLONG uOldIdle = 0;
static ULONGLONG uOldKrnl = 0;
static ULONGLONG uOldUsr = 0;
ULONGLONG uIdle = ((ULONGLONG)ftIdle.dwHighDateTime << 32) | ftIdle.dwLowDateTime;
ULONGLONG uKrnl = ((ULONGLONG)ftKrnl.dwHighDateTime << 32) | ftKrnl.dwLowDateTime;
ULONGLONG uUsr = ((ULONGLONG)ftUsr.dwHighDateTime << 32) | ftUsr.dwLowDateTime;
//Only if we have previous values
if(bUsedOnce)
{
ULONGLONG uDiffIdle = uIdle - uOldIdle;
ULONGLONG uDiffKrnl = uKrnl - uOldKrnl;
ULONGLONG uDiffUsr = uUsr - uOldUsr;
if(uDiffKrnl + uDiffUsr)
{
//Calculate percentage
nRes = (int)((uDiffKrnl + uDiffUsr - uDiffIdle) * 100 / (uDiffKrnl + uDiffUsr));
//Check value and correct it (Just in case)
if(nRes < 0)
nRes = 0;
else if(nRes > 100)
nRes = 100;
}
}
//Remember previous data
bUsedOnce = TRUE;
uOldIdle = uIdle;
uOldKrnl = uKrnl;
uOldUsr = uUsr;
}
return nRes;
}
但自 Windows 10 以来,我收到软件用户的报告,称此方法提供的读数可能是错误的。有人告诉我,它报告的值可以低至 Windows 任务管理器
显示值的一半。
我自己运行测试已经有一段时间了,它似乎有点接近笔记本电脑上任务管理器的读数,但是当我在配备英特尔酷睿的台式机上运行它时i7-4770 CPU @ 3.40GHz,具有 4 个物理核心和 8 个逻辑核心,读数似乎始终太低:
请注意,我在同一硬件上安装了 Windows 7(现在运行 Windows 10),并且当时它在 Windows 7 上运行得相当可靠。
那么有什么想法可以让它在 Windows 10 下工作吗?
最佳答案
试试这个:
#include "TCHAR.h"
#include "pdh.h"
static PDH_HQUERY cpuQuery;
static PDH_HCOUNTER cpuTotal;
void init(){
PdhOpenQuery(NULL, NULL, &cpuQuery);
PdhAddCounter(cpuQuery, L"\\Processor(_Total)\\% Processor Time", NULL, &cpuTotal);
PdhCollectQueryData(cpuQuery);
}
double getCurrentValue(){
PDH_FMT_COUNTERVALUE counterVal;
PdhCollectQueryData(cpuQuery);
PdhGetFormattedCounterValue(cpuTotal, PDH_FMT_DOUBLE, NULL, &counterVal);
return counterVal.doubleValue;
}
关于c++ - 获取当前 CPU 利用率的方法在 Windows 10 上运行不可靠,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42100896/