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I've got a 5 year old Dell Dimension running WinXP SP3 that's really chugging along - Process Hacker (and Windows Task Manager) both report abnormally high Interrupt CPU usage. This ranges from 10-70%. I've read some about DMA vs PIO problems - are there other issues that can cause this kind of hardware interrupt spike in CPU usage? Where would one start?

Hennes
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JDB
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2 Answers2

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See this thread for instructions

http://www.msfn.org/board/topic/140263-how-to-get-the-cause-of-high-cpu-usage-by-dpc-interrupt/

Moab
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The performance toolkit, xperf tool usage is limited on XP, because the function stackwalk wasn't implemented yet on XP. So no , it would not work on xp.

Joe
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