High acpi.sys latency

Everything about latency. This section is mainly user/consumer discussion. (Peer-reviewed scientific discussion should go in Laboratory section). Tips, mouse lag, display lag, game engine lag, network lag, whole input lag chain, VSYNC OFF vs VSYNC ON, and more! Input Lag Articles on Blur Busters.
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Slender
Posts: 1576
Joined: 25 Jan 2020, 17:55

Re: High acpi.sys latency

Post by Slender » 20 Mar 2025, 23:52

also, im using useplatformtick yes with hard hpet bios off + 0.488 timer, it gives me best result about input
windows 1803

JimCarry
Posts: 586
Joined: 24 May 2024, 20:01
Location: csgo

Re: High acpi.sys latency

Post by JimCarry » 21 Mar 2025, 00:24

Slender wrote:
20 Mar 2025, 23:52
also, im using useplatformtick yes with hard hpet bios off + 0.488 timer, it gives me best result about input
windows 1803
so on my windows should i add useplatformtick yes,because i dont see hpet off in bios on my asus mb,on my old mb asus i can see hpet via scewin but on the new one i cant.
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Slender
Posts: 1576
Joined: 25 Jan 2020, 17:55

Re: High acpi.sys latency

Post by Slender » 21 Mar 2025, 00:26

JimCarry wrote:
21 Mar 2025, 00:24
Slender wrote:
20 Mar 2025, 23:52
also, im using useplatformtick yes with hard hpet bios off + 0.488 timer, it gives me best result about input
windows 1803
so on my windows should i add useplatformtick yes,because i dont see hpet off in bios on my asus mb,on my old mb asus i can see hpet via scewin but on the new one i cant.
usetick work way way better on old timer windows like 7, 1607, 1709, 1803.

JimCarry
Posts: 586
Joined: 24 May 2024, 20:01
Location: csgo

Re: High acpi.sys latency

Post by JimCarry » 21 Mar 2025, 00:28

Slender wrote:
21 Mar 2025, 00:26
JimCarry wrote:
21 Mar 2025, 00:24
Slender wrote:
20 Mar 2025, 23:52
also, im using useplatformtick yes with hard hpet bios off + 0.488 timer, it gives me best result about input
windows 1803
so on my windows should i add useplatformtick yes,because i dont see hpet off in bios on my asus mb,on my old mb asus i can see hpet via scewin but on the new one i cant.
usetick work way way better on old timer windows like 7, 1607, 1709, 1803.
i still dont understand anything , what is this numbers is this win version,mine is not of them ?

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kyube
Posts: 563
Joined: 29 Jan 2018, 12:03

Re: High acpi.sys latency

Post by kyube » 21 Mar 2025, 07:24

Slender wrote:
20 Mar 2025, 23:21
im on GL 3.0 and Z790 usb, also trying asm3141 (with/without driver) and mcs9990 (that is old usbport.sys driver), behaivor is same.
2 things is affect on it:
csm mode, disable / enable ecores (bios / os numproc). For me better using csm + numproc.
how to check you have issue:
install w10, enable useplatformtick yes, open dpclat. checker: if you see 1004-1009 (1013-1015) when move mouse - you have issue.
if stable 1000 and 1001 when move mouse - not.
I think you're genuinely trolling at this point, akin to a majority of users in this subforum.
The GL 3.0 is a USB hub, it'll still use wdf0100.sys which causes major DPC/ISR overhead compared to Asmedia-based drivers.
Your DPC Latency Checker testing is also completely unfound & lacking any objectively useful data, considering that the tool hasn't worked since Windows 7 era.

At this point, I don't even understand what you're trying to "fix" by doing this "test".

If you want to minimise DPC/ISR's from your USB peripherals (mouse, keyboard, microphone), the Asmedia controller with it's vendor-specific driver helps you with that.
It substantially lowers driver overhead caused by any kind of USB polls, when the device is placed on the controller.

That bcdedit isn't useful anymore, dare I say it was never useful to begin with either.
You lack concrete testing data in form of PresentMon metrics in a repeatable testing environment, placeboing yourself with these edits won't help.
You don't provide any external total system latency testing data either.

W10 doesn't utilise heterogenous CPU's well, the kernel doesn't have the specific code for e-core compatibility.
W11 22H2 or 23H2 with SpeedStep enabled is a must if you want Windows to utilise E-Cores properly.
The background polling rate change is also a great addition for 8kHz users, added to 23H2.

unconnected
Posts: 44
Joined: 08 Oct 2023, 19:52

Re: High acpi.sys latency

Post by unconnected » 21 Aug 2025, 18:42

OostBlokBoys wrote:
20 Mar 2025, 06:03
Slender wrote:
15 Mar 2025, 19:46
nice to see 4 isr in wdf01000, that is instant value when move mouse. That is software issue and idk how to fix it on new platform (that exist on 9700k and 5800x).
you need to try 23h2 v2.
For anyone looking, this is an ASRock exclusive issue.
I found the fix.
For some reason the SATA controller was not automatically updated and required a manual driver upgrade.
The update link can be found online but if necessary DM me.
Hello and sorry for the necro,
would you please elaborate on the answer?
I have same issues

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