[pve-devel] Windows 10 1803 update, hpet bug (high cpu usage)

Alexandre DERUMIER aderumier at odiso.com
Sun Jun 24 13:58:04 CEST 2018


>>They are 2 missing hyper-v enlightments, 
>>"hv-synic" & "hv-stimer" 
>> 
>>which helps to reduce vm exits

user on the forum has reported better result with theses 2 hyper-v enlightments,
keeping -no-hpet.

I don't known if it's planned to add qemu 2.12 soon, but we could had theses 2 enlightments 
during the qemu machine upgrade.


(We didn't added them previously in proxmox4 because it's needed kernel 4.5)



----- Mail original -----
De: "aderumier" <aderumier at odiso.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Samedi 23 Juin 2018 17:20:13
Objet: Re: [pve-devel] Windows 10 1803 update, hpet bug (high cpu usage)

BTW, 

They are 2 missing hyper-v enlightments, 
"hv-synic" & "hv-stimer" 

which helps to reduce vm exits 


https://bugzilla.redhat.com/show_bug.cgi?id=1465938 



----- Mail original ----- 
De: "aderumier" <aderumier at odiso.com> 
À: "dietmar" <dietmar at proxmox.com> 
Cc: "pve-devel" <pve-devel at pve.proxmox.com> 
Envoyé: Samedi 23 Juin 2018 17:04:02 
Objet: Re: [pve-devel] Windows 10 1803 update, hpet bug (high cpu usage) 

>>I thought this is disabled for a reason (can't remember exactly)? 

I think it was disable because of timedrift 

https://bugzilla.redhat.com/show_bug.cgi?id=1045805 

https://bugs.launchpad.net/qemu/+bug/1086782 


----- Mail original ----- 
De: "dietmar" <dietmar at proxmox.com> 
À: "aderumier" <aderumier at odiso.com>, "pve-devel" <pve-devel at pve.proxmox.com> 
Envoyé: Samedi 23 Juin 2018 16:46:50 
Objet: Re: [pve-devel] Windows 10 1803 update, hpet bug (high cpu usage) 

> users have reported on forum 
> 
> https://forum.proxmox.com/threads/high-cpu-load-for-windows-10-guests-when-idle.44531/ 
> 
> high cpu usage with windows 10 1803 update. 
> 
> 
> They need to enable hpet (currently disabled with osversion >= 6) 

I thought this is disabled for a reason (can't remember exactly)? 

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