Still high DPC/ISA despite update

kamy · Jul 19, 2019

Hi,

I would be thankful, if someone could look at this trace file and give advice. https://1drv.ms/u/s!ArU0j0m7VFTHghCHoeHYO_sQlCFL
It seems that the (main) guilty drivers are ntoskrnl.exe and nvlddmkm.sys

I can confirm that I updated these 2 drivers to the latest version from the manufacturer, but they are still hitting.

The machine is supposed to do professional audio work, and can't afford high latencies in idle state. On a Win7 machine I had the 1/10 of the idle latency than with this new win10 machine.

Appreciate any insight.

cwsink · Jul 19, 2019

Hi kamy,

The reason is that DPC Latency Checker is only designed to give accurate results on Windows 7 or lower. Every computer running Windows 10 looks like your screenshot when checked with that program. DPC processing changed with Windows 8.x and keeps changing, actually.

Your trace in WPA looks very good from what I see. I'd suggest uninstalling DPC Latency Checker as it's actually adding to the CPU load ever so slightly. Are you experiencing DPC latency issues (audio pops, audio/video stutters, etc.) ?

kamy · Jul 20, 2019

cwsink said:
Hi kamy,

The reason is that DPC Latency Checker is only designed to give accurate results on Windows 7 or lower. Every computer running Windows 10 looks like your screenshot when checked with that program. DPC processing changed with Windows 8.x and keeps changing, actually.

Your trace in WPA looks very good from what I see. I'd suggest uninstalling DPC Latency Checker as it's actually adding to the CPU load ever so slightly. Are you experiencing DPC latency issues (audio pops, audio/video stutters, etc.) ?

I haven't tried it for the drop outs etc. Thanks for this bit of useful info about DPC checker. I'll check out the performance and post here an update.

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Still high DPC/ISA despite update

kamy

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cwsink

Sysnative Staff, BSOD Kernel Dump Expert

kamy

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