I would like to learn more about "HPET" for games.

Robertbuckles · 2022-06-09, 10:45

Hello there, gentlemen. I'd like to give a heartfelt welcome to all gamers and visitors alike. I wish you all the best of health. The reason for this has to do with video games. That is, I'd like to learn more about "HPET" and why it needs to be turned off in order to play games. It perplexes me much. Is there anyone who might be able to provide me with some useful information in this regard?

[R-DEV]ShrapGnoll · 2022-06-09, 15:35

I assume you are using a virtualized windows guest inside a kvm host. HPET timers give really bad performance with windows guests, instead you need to turn on HyperVClock which is windows version of a virtualized event timer.

You can also try disabling spinlocks instead of enabling them like below, its been a while but I remember having to enable/disable that.

Code:

<features>
  <hyperv>
   <relaxed state='on'/>
   <vapic state='on'/>
   <spinlocks state='on' retries='8191'/>
  </hyperv>
 <features/>

 <clock ...>
  <timer name='hypervclock' present='yes'/>
 </clock>

https://blog.wikichoon.com/2014/07/e...-with-kvm.html

Robertbuckles · 2022-06-10, 13:16

Thanks for replying. I will give you feedback after trying the process you mentioned.

Robertbuckles · 2022-06-11, 05:30

So, guys. I found some solutions (like this) about "HPET" after searching on Google. You are right. after disabling the HPET feature, the performance increased more than before. Thank you.

2022-06-09, 10:45	#1
Robertbuckles Join Date: Apr 2020 Posts: 3 United States of America Location: New York	I would like to learn more about "HPET" for games. Hello there, gentlemen. I'd like to give a heartfelt welcome to all gamers and visitors alike. I wish you all the best of health. The reason for this has to do with video games. That is, I'd like to learn more about "HPET" and why it needs to be turned off in order to play games. It perplexes me much. Is there anyone who might be able to provide me with some useful information in this regard?

2022-06-09, 15:35	#2
[R-DEV]ShrapGnoll PR:BF2 Developer Join Date: Apr 2019 Posts: 47 Canada	Re: I would like to learn more about "HPET" for games. I assume you are using a virtualized windows guest inside a kvm host. HPET timers give really bad performance with windows guests, instead you need to turn on HyperVClock which is windows version of a virtualized event timer. You can also try disabling spinlocks instead of enabling them like below, its been a while but I remember having to enable/disable that. Code: <features> <hyperv> <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='8191'/> </hyperv> <features/> <clock ...> <timer name='hypervclock' present='yes'/> </clock> https://blog.wikichoon.com/2014/07/e...-with-kvm.html

2022-06-10, 13:16	#3
Robertbuckles Join Date: Apr 2020 Posts: 3 United States of America Location: New York	Re: I would like to learn more about "HPET" for games. Thanks for replying. I will give you feedback after trying the process you mentioned.

2022-06-11, 05:30	#4
Robertbuckles Join Date: Apr 2020 Posts: 3 United States of America Location: New York	Re: I would like to learn more about "HPET" for games. So, guys. I found some solutions (like this) about "HPET" after searching on Google. You are right. after disabling the HPET feature, the performance increased more than before. Thank you.