无论其他过程性能如何，都可以选择准确的定时。 [英] Options for Accurate timings regardless of other process performance.

问题描述

我们正试图使用​​timeSetEvent每500ms调用一次看门狗功能。



通常情况下看门狗没有任何问题。但是，当DVD插入驱动器时，我不会收到长达8秒的回调。使用WindowsQueue时，事情并不是那么糟糕，我得到了4秒钟。



我最后的尝试是将线程优先级设置为时间关键，然后休眠500ms ，但是8secs没有发生回调。



我还在运行XP，但是我不知道后来的操作系统会做什么改变这更好。



我以DVD插入为例。我希望代码在可能的情况下对其他条件具有鲁棒性。



任何建议都非常感谢。

We are trying to call a watchdog function every 500ms using timeSetEvent.

Normally the watchdog is called without any problems. However when a DVD is inserted into a drive I don't get a callback for up to 8 secs. Using WindowsQueue times things aren't quite so bad and I get a 4 second day.

My last attempt was to set thread priority to time critical and then sleep for 500ms, but again the callback didn't occur for 8secs.

I am still running XP, but I'm not aware of changes made in later operating systems which would make this better.

I am using the DVD insertion as an example. I'd like the code to be robust to other conditions if possible.

Any suggestions greatly appreciated.

推荐答案

我会在看门狗例程中测量进程的CPU时间，而不是假装准确的时序。

Instead of pretending accurate timing, I would measure, in the watchdog routine, the CPU time of the process.

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