Necrosaro
Active Member
Try disabling your network device and if a laptop try disabling ACPI control method or whatever it's called under battery. Make sure you restart after disabling and try again
Discussion: NVIDIA Display Driver (nvlddmkm.sys) DPC Latency
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Hellbovine
Well-Known Member
Are you on a laptop by chance? Usually when ACPI.sys is *that* bad, it's due to the throttling drivers and other bios settings that usually cannot be changed in laptops.
Chunky1311
New Member
Negative, Desktop PC.
Definitely has something to do with the powering down / spinning up my one HDD, since making it stay powered on all the time stopped ACPI.sys causing any issues.
To remedy ACPI.sys or nvlddmkm.sys?
It's no real effort to disable my network device (on-board LAN) and see if it helps remedy either issue.
I did a fair bit of tinkering with the OS timers and HPET myself, actually.
Allowing my PC to use HPET absolutely cripples performance; the OS was horridly slow to even boot and simple tasks like opening the start menu or file explorer took 5+ seconds to perform, when they'd usually be near instantaneous.
I currently use most of those edits already, aside from tscsyncpolicy
My BIOS has no HPET setting, it's always enabled I assume.
Disabling or allowing it in the device manager makes no difference to anything, as far as I can tell.
Necrosaro
Active Member
It's weird but sometimes the device you least expect to be causing the issue is the one that is causing it that is why I asked if you could disable your ethernet driver,restart and try again just to see. If not no hair of our backs but if it is then we can work forward in fixing it.
Hellbovine
Well-Known Member
Nodnod. And for others like myself, it changes nothing, and then some people say it improves things. Which is why I think really it's just bugs at play. I mean it *has* to be a bug, because Windows is designed around having HPET enabled, and has been for a long time, and so the real problem is just figuring out *what* is responsible for the bug. That's the super hard part. Could be motherboard bios, could be some Windows settings, could be a driver...
Here's what I find interesting, and what everyone here should be posting screenshots of, because it will help figure out why HPET is or isn't helping. By default, my machine on a clean install of W10 21H2 already uses Invariant TSC 10mhz which is one of the approaches that people recommend. Check out this article (link1) for an example.
The tool everyone needs is the TimerBench from here (link2) since it shows what your QPC value is at, which is what HPET is changing.
I suspect that in situations like yours, for some reason Windows is defaulting to a different timer. Can you check your clean install of Windows and see what TimerBench shows as the QPC value before you manually change HPET stuff?
My theory is that during Windows Setup it's detecting your hardware configurations and changing the default QPC. You can see this same thing happening in the power plans for example, Windows changes a lot of settings based on your hardware, and so one person's power saver/balanced/high performance plan isn't going to be the same as another persons. This theory would at least explain why changing HPET works for some people and not others.
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Hellbovine
Well-Known Member
Chunky1311
New Member
Well, I tried disabling my network device and allowing my HDD to spin down again.
Immediate issues with nvlddmkm.sys DPC in the thousands, so no change there.
Once the HDD had spun down and I went to use it, so it had to spin up again, well...
So unfortunately, no change to either.
Back to keeping my HDD always powered up and working to resolve nvlddmkm.sys XD
It only changes if I force HPET.
It still currently shows Invariant TSC:
TimerBench is one of a collection of tinkering programs I have on any Windows install right away:
Immediate issues with nvlddmkm.sys DPC in the thousands, so no change there.
Once the HDD had spun down and I went to use it, so it had to spin up again, well...
So unfortunately, no change to either.
Back to keeping my HDD always powered up and working to resolve nvlddmkm.sys XD
As far as I recall, TimerBench showed Invariant TSC from the get-go after the fresh install.
It only changes if I force HPET.
It still currently shows Invariant TSC:
TimerBench is one of a collection of tinkering programs I have on any Windows install right away:
Necrosaro
Active Member
Thanks for trying. I wonder "on mine" I turned off the p2 power savings setting in Nvidia inspector(app that goes deep dive into Nvidia) to let my Nvidia card to run full even if doing nothing. It stays at full clock speed.
Not sure if anyone has done that here on and if it helped.
The reason I do this is because when watching 4k movies my card turns down but doesn't with gaming. It also turned down with YouTube videos or Netflix stuff like that
Hellbovine
Well-Known Member
Chunky1311, regarding ACPI DPC, over in my "Optimized Image" guide you may want to try and download the tweaks folder, and take a look at the Power Plan registry file I created. It was designed to address this exact problem.
Windows is very power-saving for whatever reason nowadays, which is fine for laptops, but not so much on gaming desktops. You can run the reg file from your desktop and it'll install all the keys. Backup stuff first, or try it on a test computer just to be safe, but I've tested these extensively on both an older desktop and a new laptop, and it worked great on both. It's all documented, and you can do some Googling to look into them as well to verify.
Windows is very power-saving for whatever reason nowadays, which is fine for laptops, but not so much on gaming desktops. You can run the reg file from your desktop and it'll install all the keys. Backup stuff first, or try it on a test computer just to be safe, but I've tested these extensively on both an older desktop and a new laptop, and it worked great on both. It's all documented, and you can do some Googling to look into them as well to verify.
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Hellbovine
Well-Known Member
Are you able to try turning it off and on again and capture it with a reg compare? It would be easiest and best for us to try it out using just the reg key, which I'm sure is probably what it's changing. I'd definetly try. I know for sure W10 will still try to downclock your CPU even during intense gaming or benchmarks to 50% even if all core parking is disabled, whenever it senses milliseconds/microseconds of "downtime". There are settings to change that, but you have to be super careful because you can brick your machine messing with them. Just straight up disabling Idle states for example causes huge problems.
Necrosaro
Active Member
With the toddler patoots right now and dislike having her around my computer. She tends to do things with the computer that don't approve off haha.
However she likes watching me test my overclocks before haha my little girl for sure lol.
Uploaded a picture what I was saying however from another site.
Just make sure you hit apply after and if it errors at start of program don't worry about it.
As an update add on, you can see if it is working with Msi afterburner
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Chunky1311
New Member
I'll try both these tomorrow and report back, I've got to head to bed for now.
I agree, Windows is overly aggressive with it's power saving and illusive with any options to disable power saving features.
I have a desktop PC and solar power, I don't need any power saving XD
I worry more about the longevity of parts, particularly keeping my HDD spinning constantly.
I use Process Lasso for it's "Induce Performance Mode" that you can set per-program.
It forces max clock speeds and forbids core parking when engaged.
It also has some other nice features, like per-program CPU affinity or priority, the option to constantly reapply settings in case Windows tries to do anything fucky, and the option to change power plans based on PC usage (idle=power saving until you use your PC and it'll change back to balanced or whatever you choose).
It's a rather useful program imo.
And finally, "toddler patoots" got a chuckle out of me XD
Necrosaro
Active Member
I have a AMD 8350 cpu with a AM3 motherboard for a very long time. "Consistency in power as well as clean power is the most important for parts for longevity. Same goes for anything in your home or most things that are electronic. I have had them both overclocked for past 10 years with no issue. Just cleaning, reapplying paste typical stuff.
I still got my FM2+ setup in storage, i wont get rid of it, xp capable.
у меня проблема со стабильной мышью, когда мой графический процессор nvidia включен, но у меня хорошая задержка dpc (немного больше, чем у Intel)
Moderator edit - google translation to english.
i have problem with stable mouse when my nvidia gpu is enabled but i have good dpc latency (slightly more than intel)
maybe it is amd + nvidia capability
Moderator edit - google translation to english.
i have problem with stable mouse when my nvidia gpu is enabled but i have good dpc latency (slightly more than intel)
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Hellbovine
Well-Known Member
To be honest I never actually got around to bothering with mouse testing, because I never had a reason to (never felt like there were problems), so I don't have any expertise on that benchmarking subject, except that maybe the reason I never had issues was because of some other things I've done over the years. Here's my typical mouse-optimization routine, maybe one of these will at least help you a bit, until this driver issue gets fixed:
[1] I always use the high performance power plan, which will absolutely affect things like DPC and mice. And I also tweak the USB power plan settings so that they are not trying to disable my USB slots all the time to save power. I'm pretty sure this is where a lot of mice issues come from, because instead of the mouse being at full power all the time it is constantly powering down and powering up, which introduces jitter and other problems. Look at my Optimized Image guide and inside the download folder it has my power plan settings.
[2] I never use a wireless mouse (uneccesary input lag) and never a mouse that requires drivers (the number of poorly written drivers out there is overwhelming). Instead, I use mice like the Razer Abyssus which are either preset to a certain mhz/dpi, or have physical buttons on the bottom of the mouse that can toggle between a few different mhz/dpi combinations, and no drivers to install.
[3] Use a decent mouse pad, and preferably one that is all black, no colors or pictures, and cloth is probably the best. I do like the feel of the super thin and hard mouse pads like the Sphex, but they eat up the feet on your mouse like crazy and I've had to reorder new feet every few months.
[4] I would never use a regular 125mhz mouse, in my prime gaming I could literally feel that input lag, I would quickly move my mouse across the screen and left-click to shoot off a sniper round, and I would feel the delay. A 1000mhz/1800dpi mouse made that issue go away, and was my favorite combination. I think dpi and mhz that are too high are probably another part of the problem too, I'd wager there would be less issues if people would stop using marketing hyped massive mhz/dpi combos.
[5] In the Windows mouse settings, turn off enhance pointer precision, and leave the mouse speed at the default Windows setting. Never mess with that slider. Instead, change the mouse speed in your game settings of each individual game to avoid problems with acceleration and such.
[6] It's possible that the Nvidia driver/dpc issues are affecting your mouse too, because this is a pretty bad bug and I think it's multipronged so it is likely affecting quite a few things negatively.
[2] I never use a wireless mouse (uneccesary input lag) and never a mouse that requires drivers (the number of poorly written drivers out there is overwhelming). Instead, I use mice like the Razer Abyssus which are either preset to a certain mhz/dpi, or have physical buttons on the bottom of the mouse that can toggle between a few different mhz/dpi combinations, and no drivers to install.
[3] Use a decent mouse pad, and preferably one that is all black, no colors or pictures, and cloth is probably the best. I do like the feel of the super thin and hard mouse pads like the Sphex, but they eat up the feet on your mouse like crazy and I've had to reorder new feet every few months.
[4] I would never use a regular 125mhz mouse, in my prime gaming I could literally feel that input lag, I would quickly move my mouse across the screen and left-click to shoot off a sniper round, and I would feel the delay. A 1000mhz/1800dpi mouse made that issue go away, and was my favorite combination. I think dpi and mhz that are too high are probably another part of the problem too, I'd wager there would be less issues if people would stop using marketing hyped massive mhz/dpi combos.
[5] In the Windows mouse settings, turn off enhance pointer precision, and leave the mouse speed at the default Windows setting. Never mess with that slider. Instead, change the mouse speed in your game settings of each individual game to avoid problems with acceleration and such.
[6] It's possible that the Nvidia driver/dpc issues are affecting your mouse too, because this is a pretty bad bug and I think it's multipronged so it is likely affecting quite a few things negatively.
You should do that if you use a usb audio interface. If the system goes to sleep and i wake it up i have to unplug/plug in the interface.
Dont need sleep states, pc is either on or off.
Gaming/Professional rodents are expensive
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Hellbovine
Well-Known Member
I have one of the officially licensed wired-only controllers for my Nintendo Switch, and this happens every single time I turn the Switch on. It drives me bat sh*t crazy to have to unplug and plug in the controller again every time!
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