Question

I have a driver & device that seem to misbehave when the user does any number of complex things (opening large word documents, opening lots of files at once, etc.) — but does not reliably go wrong when any one thing is repeated. I believe it’s because it does not handle high interrupt latency situations gracefully.

Is there a reliable way to increase interrupt latency on Windows XP to test this theory?

I’d prefer to write my test programn in python, but c++ & WinAPI is also fine…

Answer 1

My apologies for not having a concrete answer, but an idea to explore would be to use either c++ or cython to hook into the timer interrupt (the clock tick one) and waste time in there. This will effectively increase latency.