Another look at HPET High Precision Event Timer

Sorrry, I missunderstanded you. Did you changed anything referred to HPET? weird.

 

It is not weird. Some process in OS called that API function which set timer minimum resolution.

 

Not a thing, just went to run the tool today to play some Crysis 3 and noticed the difference.

Maybe it was just my eyes (or I'm going mad), but I swear it was 1.000ms.

Ahh, that was probably it - I'm not going mad after all :banana:

 

If you guys want I can try to implement system service which will call that timer resolution function at OS start and maintain it (resolution) in all session span.

 

I recently tried this again on a new install, and it still didn't work out for me. I used the bcdedit command useplatformclock true, and then used the command /deletevalue to undo it. For some reason after this my processor will not clock down from 4.6 when it is idle. I double checked my BIOS settings and all the power saving features for the processor are set to enabled instead of auto, but I still can't downlock for some reason.

CPU-Z shows a constant 4.6ghz, while Windows task manager shows fluctuations from 3.4-4.6 while idle but never the proper 1.6 when completely idle.

Does it have anything to do with this, and is there a way to get to a pure Windows default value for HPET?

 

Anyone using a CPU that has an invariant TSC (Intel Nahalem+ or AMD Bulldozer+) is handicapping themselves by forcing HPET, as the invariant TSC counts at the standard CPU frequency independently of power state or overclocking.

For my i7-2600K, that's 3400MHz of precision vs 14.3MHz of the HPET.

 

it dynamically changes it if you dont set a value.. so no problem at all no worries

 

Try to execute bcdedit /set useplatformclock false

And you need to reboot after that...

And Windows has its own power settings. May be they were changed/shifted/triggerred...

 

Hey guys just bought Timer Resolution 2.0 how do I set it up in the commandline to hide and max? thanks

 

C:\TimerResolution20.exe -max -hide its in the docs. Read them.

 

Thanks love this tool BF3 seems a little smoother now! and it's nice not having it open lol

 

with hpet disabled, latency bounces around 15-70us

with it enabled it stays around 70us

my hauppauge usb 950q tuner causes it to randomly go to 200-300us for a split second causing audio stutter.

drivers are up to date.

 

That is debatable. Hpet on in Windows = NO latency spikes for me but QueryPerfomanceCounter is 750ns

Hpet off in Windows = 1000+us Latency spikes for me, but QueryPerformanceCounter is 7.5ns And I see no differnece on how my games play.

No Latency Spikes is preferable. Every computer is different what good for one is not good for another This has be proven time and time again in the many topics regarding Hpet, and any cpu that supports iTSC uses it regardless.

Go for it some of us would service to control this.

 

I implemented the service. Now you tell me the preferrable way of binary executable file sharing.

 

this is my results with hpet on and off

 

hey guys.
im reading here for some time now and just decided to create an account.

you dont have to pay 10 bucks to set your timer resolution.
here is a simple c# code which sets the res to 0.5 every 60secs.

Code:

using System;
using System.Runtime.InteropServices;

namespace SetTimerRes
{
    class TimerRes
    {

        [DllImport("ntdll.dll", EntryPoint = "NtSetTimerResolution")]
        public static extern void NtSetTimerResolution(uint DesiredResolution, bool SetResolution, ref uint CurrentResolution);


        static void Main(string[] args)
        {
            uint DesiredResolution = 9000;
            bool SetResolution = true;
            uint CurrentResolution = 0;

            while (true)
            {
                NtSetTimerResolution(DesiredResolution, SetResolution, ref CurrentResolution);
                System.Threading.Thread.Sleep(6000);
            }
        }
    }
}

if you want i can upload precompiled binary which has no window. just runs in the background.
ready to put in your autostart folder.

 

Sure, upload. I'd like to try it.

 

here you go:

http://fbe.am/hYR

you need latest net framework.

 

Pipes you have to hit maximum to get the benefit.

 

Interesting, but because you're new here (trust), can you tell us how to compile it instead?
So we could feel safe from virus.
(Well I will probably have googled about compiling in the meanwhile lol but thank you, nice input)

Also you can just put Timer Resolution 1.2 (free) into your Startup folder, still have to click it and run it in background but it's only have to be done one time after boot.