QueryPerformanceCounter 是否保证为您提供启动后的时间？
可以安全地假设从 QueryPerformanceCounter 返回的计数 与上次系统启动以来的时间有关？或者可以在系统运行时重置吗？ MSDN 文章本身并不能保证这一点，但是我看到了一些第三方信息（例如 this) 表示情况确实如此。
Is it safe to assume that the count returned from QueryPerformanceCounter relates to the time since the last system boot? Or could it be reset while the system is running? The MSDN article itself doesn't guarantee this, however I've seen some 3rd party information (such as this) that says that this is the case.
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它旨在用于相对时间。但我不认为它可以用来测量启动后的时间。
据我所知，它是使用 rdtsc 指令实现的，该指令测量 CPU 开机后的“伪”CPU 周期。在这种情况下，是的，它可能确实给出了自启动以来的时间，但我不认为这是指定的。
It's meant to be used for relative times. But I don't think it can be used to measure time since boot.
From what I hear, it's implemented using the
rdtscinstruction which measures "pseudo" CPU cycles since the CPU was powered on. In that case, yes, it probably does give the time since boot, but I don't think this is specified.