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High DPC due to Nvidia Kernel Driver?
- Thread starter Tephnos
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Soldato
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As said in the x99 support thread on OCN, no issues like you describe here, on any driver up to latest WHQL. Needs further investigation.
Soldato
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No, HPET is not an option on X99 ASUS boards, it's also not enabled by default in W10
Okay, so I said **** it and reinstalled Win10 from scratch, and took a latencymon test with absolutely no drivers installed.
Results were good, as expected. Installed the nvidia driver then did another:
Once all the other drivers were installed I got these results:
Basically the same, just a little higher interrupt.
Results were good, as expected. Installed the nvidia driver then did another:
Once all the other drivers were installed I got these results:
Basically the same, just a little higher interrupt.
I am using multi monitors actually, let me just disable one and test.
More reading tells me Intel NIC drivers completely suck with Win10 and can cause spikes when using the network. In lieu of that, I blasted the NIC with some data transfer and captured it in an xperf
No expert at reading them though:
https://www.dropbox.com/s/agah4ymz6ij9ar5/CPU.etl?dl=0
No expert at reading them though:
https://www.dropbox.com/s/agah4ymz6ij9ar5/CPU.etl?dl=0
Source?!
They said this on every version of windows past 8 and lied through thier teeth. If the thing is in your device manager, Then it is enabled? Windows will check what timers are used and will change if HPET is detected. It did this on my Z87 just like X99 they told me HPET is disabled by default, Yea so why is a server and slower time featured in the device manager as high precision event timer clock? After i hunted down a custom bios with a toggle i manually set to off and low and behold Nvidia DPC nosedive, No more red errors either.
In short if you were told this by anyone other than Microsoft then it is probably a lie, I asked Asus and Gigabyte and thier response was Asus did not know what HPET was.... And Gigabyte put out the same line as you did which i disproved myself on 8.1 64bit
Soldato
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Hi,
This is actually a valid point to bring up. Make sure you are running the latest drivers for the Ethernet adapter.
ASUS will know full well what HPET is wholly. Depends on whom at ASUS you spoke to. X99 motherboards (at least ASUS) only support Windows 7 and newer operating systems/CPU's with constant rate time stamp counters (so there is no need for a BIOS option)
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No,
The latest drivers (20.3) still have that issue. The last ones that didn't have them was 18.5 - which isn't on Windows 10. Until Intel fix their crap we have to deal with it.
However, it still doesn't seem likely. The ONLY driver that goes above 0.2ms is the nvidia kernel and I'm starting to think it may be a power management issue within the card drivers or the card itself.
When I have latencymon running and the screens turn off for inactivity, even if the latency was just fine before that, when its back it will have jumped up to 2.5ms. Interesting.
The latest drivers (20.3) still have that issue. The last ones that didn't have them was 18.5 - which isn't on Windows 10. Until Intel fix their crap we have to deal with it.
However, it still doesn't seem likely. The ONLY driver that goes above 0.2ms is the nvidia kernel and I'm starting to think it may be a power management issue within the card drivers or the card itself.
When I have latencymon running and the screens turn off for inactivity, even if the latency was just fine before that, when its back it will have jumped up to 2.5ms. Interesting.
Soldato
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DPC issues are normally very system specific. Contact NVIDIA - I'm on X99 with no issues on W10
The rep I know personally thinks it is probably a power management bug - they have a lot of those needing fixes.
Also, have you actually tried running tests, or just saying that because you're not symptomatic? A friend on Win10 with a sandy bridge chipset and 760s showed similar results and similar audio popping on USB, he fixed it by getting a PCEi slotted USB card that plugged into one of the mobo USB slots and ignoring the inbuilt ports totally.
The lag was still there on his results though.
Soldato
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Nope..
Dpc latency issue range from a lot of things. One bad driver on your system can give you latency issues.
USB, network storage driver to name the biggest ones.
Yeah, and based on my results the nvidia kernel is the only one to blame, everything else is barely 0.2ms. Nvidia's Win10 drivers have been notoriously atrocious, and I'm thinking a downgrade to Win8.1 might be my last hope.
Hi guys,
Back on windows 8.1 now.
I'm still getting DPC routine executions of over 1ms when doing certain stuff (must be a power management thing in the GPU for sure) but someone in this thread earlier said to ignore that, so whatever. It hasn't gone 'red text' yet on me, and the interrupt hasn't going to frighteningly high numbers.
I'll keep monitoring and keep you guys updated, but an early conclusion looks to be, while the nvidia kernel driver has always been a resource hog, it seems complete ******** on Windows 10.
Back on windows 8.1 now.
I'm still getting DPC routine executions of over 1ms when doing certain stuff (must be a power management thing in the GPU for sure) but someone in this thread earlier said to ignore that, so whatever. It hasn't gone 'red text' yet on me, and the interrupt hasn't going to frighteningly high numbers.
I'll keep monitoring and keep you guys updated, but an early conclusion looks to be, while the nvidia kernel driver has always been a resource hog, it seems complete ******** on Windows 10.
Soldato
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What's that got to do with not being system specific? Shanks, bud...really.
I don't know anyone else personally even on X99 with this issue, so it's not entirely common.
P.S what motherboard is this?
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The motherboard is an X99-S.
As mentioned though, this persisted through a total of (3) x99 mobos, and my original G45. It definitely can't be the mobo, based on that.
When running idle in Windows 8.1, it was flawless for more than 2 hours. As soon as I dragged a tab out of chrome to become its own window, I can replicate a high >1ms+ DPC latency instantly.
Hum. That's interesting.
As mentioned though, this persisted through a total of (3) x99 mobos, and my original G45. It definitely can't be the mobo, based on that.
When running idle in Windows 8.1, it was flawless for more than 2 hours. As soon as I dragged a tab out of chrome to become its own window, I can replicate a high >1ms+ DPC latency instantly.
Hum. That's interesting.
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Soldato
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Not really, these type of application aren't applicable to most users - nor is the latencies you are seeing on your rig