用于确定服务是否正在执行其工作的 WMI 查询

发布于 2024-10-22 05:53:39 字数 380 浏览 5 评论 0原文

我设法使用 WMI 查询 httpd.exe 服务以检查它是正在运行还是已停止。这是我正在使用的代码：

hres = pSvc->ExecQuery(
        bstr_t("WQL"), 
        bstr_t("SELECT * FROM Win32_Process Where Name='httpd.exe'"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, 
        NULL,
        &pEnumerator);

现在我想查询该服务正在使用的 CPU 量。我想知道正在运行的服务是否正在工作。这可以做到吗？我问的问题正确吗？需要建议:)

原文

I managed to query the httpd.exe service using WMI to check whether it is running or stopped. Here is the code that I am playing with:

hres = pSvc->ExecQuery(
        bstr_t("WQL"), 
        bstr_t("SELECT * FROM Win32_Process Where Name='httpd.exe'"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, 
        NULL,
        &pEnumerator);

Now I would like to query the amount of CPU that the service is using. I want to know whether the running service is doing work or not. Can this be done? Am I asking the right question? need advice :)

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枯寂 2024-10-29 05:53:39

使用Win32_Process，您可以获得UserModeTime和KernelModeTime（以100纳秒为单位），这允许您计算期间每个CPU的平均值某个时间。

假设您获得两个由 TimeInterval（以 100 纳秒单位给出）分隔的 Win32_Process 信息。

UserTimeRate = ((UserModeTime2 - UserModeTime1) / TimeInterval) * 100;

KernelTimeRate =((KernelModeTime2 - KernelModeTime1) / TimeInterval) * 100;

CPU = (((UserModeTime2 - UserModeTime1) + (KernelModeTime2 - KernelModeTime1)) / TimeInterval) * 100;

如果您想要从一开始的速率，您可以计算从 CreationDate 到现在的 TimeInterval。

Using Win32_Process, You are able to get the UserModeTime and the KernelModeTime (given in 100 nanosecond units) which allows you to compute each CPU average during a certain time.

Assuming you get two Win32_Process informations separate by a TimeInterval (given in 100 nanosecond units).

UserTimeRate = ((UserModeTime2 - UserModeTime1) / TimeInterval) * 100;

KernelTimeRate =((KernelModeTime2 - KernelModeTime1) / TimeInterval) * 100;

CPU = (((UserModeTime2 - UserModeTime1) + (KernelModeTime2 - KernelModeTime1)) / TimeInterval) * 100;

If you want the rate from the begining, you can compute TimeInterval from CreationDate to now.

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