[pve-devel] USB Host passthrough high cpu / interupt usage

[Alexandre DERUMIER]

Hi Stefan, 

Do you see interrupts only when data transfer occur ?


I known that qemu usb3 implementation use less interrupts,
maybe could we try to implemented it in proxmox. (xhci controller)
(should not be a big task)

 


----- Mail original ----- 

De: "Stefan Priebe" <s.priebe at profihost.ag> 
À: pve-devel at pve.proxmox.com 
Envoyé: Mardi 25 Mars 2014 23:07:48 
Objet: [pve-devel] USB Host passthrough high cpu / interupt usage 

Hi, 

i'm trying to pass through 5 usb devices from the host to the guest. 
What i'm wondering is the very high interupt and cpu usage of the guest. 

These usb devices i'm passing are just tty / serial ones - so the data 
transfer is VERY low. 

Does anybody habe an idea? Latency for USB data is also very high around 
130ms. 

Stefan 
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