High DPC due to Nvidia Kernel Driver?

shankly1985 · 1 Oct 2015 at 18:34

Only use latencymon to monitor latency.

Tephnos · 1 Oct 2015 at 18:50

So ISR and DPC routine times should be ignored, and only the first two bars paid attention to?

Also, if it helps I tend to run a VM with V-Tx enabled. No idea if that is known to harm anything.

Tephnos · 1 Oct 2015 at 19:03

Well, damn.

shankly1985 · 1 Oct 2015 at 19:13

Tephnos said:
Well, damn.

Not looking good.

Tephnos · 1 Oct 2015 at 19:14

Nope, and since this carried over chipset (and so multiple possible drivers) I have no idea where to pinpoint this thing except ragenuking and starting over.

Lets not talk about my USB locking up keyboard issue on X99...

Twirlywoos · 1 Oct 2015 at 19:17

When I install nvidia drivers I do a custom clean install and deselect 3D Vision, Geforce exp and hdmi sound devices as I have no use for them. Try reinstalling drivers.

This is how mine looks

Tephnos · 1 Oct 2015 at 19:18

Hi,

The only drivers I install are the base video driver and the Physx one. The rest I disable.

Tephnos · 1 Oct 2015 at 20:33

To add some more detail, started a new monitoring session (no huge spikes yet), here's the driver tree:

Rofflay · 1 Oct 2015 at 22:37

Tephnos said:
So ISR and DPC routine times should be ignored, and only the first two bars paid attention to?

Also, if it helps I tend to run a VM with V-Tx enabled. No idea if that is known to harm anything.

Then expect problems, My DPC is only 2us idle and around 28 with Youtube, Gaming is around 45us but only because i install about 4 drivers and wont use anything USB bar my mouse and keyboard.

I would look at what you have installed, And enabled in that bios because VM doesnt sound good and your graphs clearly show problems. Mine is green all the time no matter what after i slimmed down and eliminated everything.

If you want DPC really low, Seperate your systems for gaming/work imo.

Tephnos · 1 Oct 2015 at 22:39

Rofflay said:
Then expect problems, My DPC is only 2us idle and around 28 with Youtube, Gaming is around 45us but only because i install about 4 drivers and wont use anything USB bar my mouse and keyboard.

I would look at what you have installed, And enabled in that bios because VM doesnt sound good and your graphs clearly show problems. Mine is green all the time no matter what after i slimmed down and eliminated everything.

If you want DPC really low, Seperate your systems for gaming/work imo.

With the VM off, the latency doesn't change at all, I'll mention I did try that at the moment.

Installation is again very barebones. Seems like I'm gonna have to nuke the OS though if I want any hope of isolating this, which sucks since I don't have a spare PC to mess around on in the meantime.

fs123 · 1 Oct 2015 at 22:51

Try this DPC latency checker..gives a much better visual representation and you can see the problem latency easier.

http://www.thesycon.de/deu/latency_check.shtml

Tephnos · 1 Oct 2015 at 22:51

That one doesn't work in Win10 at all.

Readings are wildly inaccurate.

shankly1985 · 1 Oct 2015 at 22:54

fs123 said:
Try this DPC latency checker..gives a much better visual representation and you can see the problem latency easier.

http://www.thesycon.de/deu/latency_check.shtml

That hasn't been updated in a long time.. LatencyMon is the go to program for this type of issue.

fs123 · 1 Oct 2015 at 22:55

Tephnos said:
That one doesn't work in Win10 at all.

Readings are wildly inaccurate.

Yes just tested it. Was ok in Windows 7. Oh well was worth a try.

siriq111 · 1 Oct 2015 at 22:57

Not really the nvidia driver makes high dpc latency but the setup of the users rig. We have another thread at guru3d. Worth to check it out.

Tephnos · 1 Oct 2015 at 22:58

siriq111 said:
Not really the nvidia driver makes high dpc latency but the setup of the users rig. We have another thread at guru3d. Worth to check it out.

Link? Posted driver tree and don't see much being able to mess with it. Help before I drive myself insane with rage.

siriq111 · 1 Oct 2015 at 23:11

Tephnos said:
Link? Posted driver tree and don't see much being able to mess with it. Help before I drive myself insane with rage.

There you go. http://forums.guru3d.com/showthread.php?t=402474

p.s. : to be honest, i do not experience any stutter longtime. I mean years, if you setup your rig in the right way. Obviously, i have had install plenty of different drivers but smooth as butter always. Some driver even better, some of them not that much but once again, no stutter over years.

shankly1985 · 1 Oct 2015 at 23:14

AMD driver dont even show any signs of latency. Something else making your Nvidia kernel hang to much?

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Rest of my system

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siriq111 · 1 Oct 2015 at 23:21

shankly1985 said:
AMD driver dont even show any signs of latency. Something else making your Nvidia kernel hang to much?

Rest of my system

Plenty of amd users report stutter as well. Infact my friend 290x had less fps and major sutter issue with many drivers. Solution is, find an different driver and try it.

shankly1985 · 1 Oct 2015 at 23:33

siriq111 said:
Plenty of amd users report stutter as well. Infact my friend 290x had less fps and major sutter issue with many drivers. Solution is, find an different driver and try it.

Don't get me wrong I pointed out to OP third post about the DPC issue I had couple years back.
Mine wasn't GPU related but Intel Smart Response SSD caching.

My post above wasn't AMD vs Nvidia I just showing OP that my driver shows no sign of DPC latency so maybe on his system another driver his making is Nvidia kernel hang longer.