[Spice-devel] any way to optimize USB2 speed on KVM?

ToddAndMargo ToddAndMargo at zoho.com
Thu May 21 09:35:33 PDT 2015


On 05/21/2015 03:22 AM, Christophe Fergeau wrote:
> Hey,
>
> On Wed, May 20, 2015 at 10:14:05AM -0700, ToddAndMargo wrote:
>> Hi All,
>>
>> Scientific Linux 6.6
>>
>> I have a bootable FC21 flash drive.  I can boot my machine
>> directly from it or run it as a virtual machine through KVM.
>>
>> Problem: it is about 5 times slower through KVM.  (Really,
>> I am not exaggerating).  Is there a was to optimize or speed
>> up USB2 through put in KVM?
>
> So you are starting QEMU/KVM by pointing it at the USB flash drive, and
> tell it to boot the guest OS from that flash drive, and this is 5 times
> slower than when you boot from the same USB flash drive directly on bare
> metal? Did I understand correctly?

Yes

> If that is what you are experiencing, this is not related to SPICE, and
> would be better reported directly to QEMU.
>
> Christophe
>

I was hoping that a Spice driver was install.  Rats!

Thank you for helping me with this.

-T

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Computers are like air conditioners.
They malfunction when you open windows
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