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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Windows 8 audio stutters. DPC Latency high on tcpip.sys
I own a Intel Core i5 760 CPU based PC. 16Gb of RAM, AMD Radeon HD 7850, Asus Xonar DSX audio card, and a Creative Sound Blaster Sigma headset (with USB audio device). It's just to enumerate all my ...
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73 views
High Interrupt DCP processor take
I have a quad core laptop with win7. Around 3 months ago the laptop occasionally slowed down.
Resource Monitor and Process Explorer show that processor 0 was 100% busy with DCP and Interrupts. A ...
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1answer
786 views
How can I reduce high CPU usage from DPC's with USB Serial Ports
I have an app that communicates with up to 50 devices over serial ports. The communication takes place in threads, and the threads are throttled so that only a certain number are active at once. ...
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0answers
2k 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 ...
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0answers
193 views
Usb wireless adapter causing DPC spikes
Bought 2 new TP-LINK WN722N USB wirless adapters as they were the highest rated on Newegg and were a great price. Both of them cause abnormally high DPC & Interrupt usage in Process Explorer and ...
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1answer
843 views
Hardware interrupts and system unresponsiveness
Very occasionally, about once a week, my Windows Vista Business machine will completely lock up for anything between a minute and several minutes. Once this happens, it recurs more frequently until I ...
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6answers
3k views
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 ...
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3answers
1k views
High DPC Latency and Slow Hard Pagefaults on Gigabyte GA-EP35C-DS3R Motherboard
I've owned a DIY-built PC on a Gigabyte GA-EP35C-DS3R motherboard for about 2 years now. When I first built this PC, it ran perfectly under Windows XP 32-bit. Performance was good, and I had no issues ...
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1answer
400 views
Are DPC latency issues improved with multiple cores?
DPC latency checker says
A device driver cannot process data
immediately in its interrupt routine.
It has to schedule a Deferred
Procedure Call (DPC) which basically
is a callback routine ...
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vote
1answer
684 views
Firewire audio dropouts Dell Vostro 3500
This question is actually answered, I'm putting it up here since other people might be running into this and it's ultra annoying. Hardware/software involved:
RME Fireface 400 firewire audio ...
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1answer
1k views
DPC latency spikes every 60 seconds related to Dell 1515 (atheros) WLAN
I'm getting DPC latency spikes every 60 seconds related to Dell 1515 (atheros) WLAN. If you turn off the wireless card, the spikes go away. If you disable wireless autodiscovery, they go away. I've ...
