Questions tagged [dpc]

DPC (Deferred Procedure Call) is a mechanism adopted by Microsoft which allows high-priority tasks on Windows (such as an interrupt handler) to defer required but lower-priority tasks for later execution.

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41 votes
6 answers
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How do I get to the root cause of high Deferred Procedure Calls?

I've got a Dual core processor, and one of the two is constantly at 100%. Looking in ProcessExplorer shows me that it's Deferred Procedure Calls. Reading around the net seems to give me tons of ...
Benjol's user avatar
  • 1,798
7 votes
2 answers
9k views

How do I analyze excessive Windows kernel mode CPU usage?

My Windows XP machine recently started to semi freeze on me every odd reboot after a few minutes of usage (different programs / no additional prg start at all). Update: I have now managed to get a ...
Martin's user avatar
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6 votes
1 answer
7k views

What is DPC Watchdog?

OK, so DPC_WATCHDOG_VIOLATION is a common Error code after a BSOD. I'd like to know - What is a DPC Watchdog? I mean, what is meant by that? What does it do in the Windows system? And how does it ...
atiyar's user avatar
  • 229
4 votes
1 answer
3k views

Intel 3945ABG DPC spikes (audio stutter, mouse) in Windows 8.1

As reported by many users, Intel WiFi chips such as 3945ABG and the later 4965 may experience CPU spikes due to DPC activity. This is typically experienced as: Audio stuttering. Uninterrupted ...
Hernán's user avatar
  • 151