Re: [Qemu-devel] EHCI USB regression in 1.2.0 - ehci_state_fetchqtd() asserting

[Shawn Starr]

On Monday, September 24, 2012 11:52:36 AM Hans de Goede wrote:
> Hi,
> 
> On 09/23/2012 08:52 PM, Shawn Starr wrote:
> > I see why there are USB errors, I am seeing corrupt video frames with
> > webcam attached via spice-usbredirection,  this is not seen with host-usb
> > attachment.
> What errors exactly are you talking about I did not notice any error
> messages in your logs.
> 

buffer overflows, not errors however

bufpq overflow, dropping packets ep 81


> > with spice/usb-redirection it can't seem to keep up with the packets,
> > freezes/drops them.
> 
> You are running Fedora-18, right? Can you please try using either kernel
> 3.6.0-0.rc6.git0.1.fc18.x86_64 or an F-17 kernel, most Fedora 18 kernels
> have various debugging options enabled causing significant additional
> latencies in the network stack.
> 

Linux segfault.sh0n.net 3.6.0-0.rc6.git0.1.fc18.x86_64 #1 SMP Mon Sep 17 
13:16:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Yes, I am running the last non-debug kernel, but frames would freeze, or you 
would get some interlaced with other frames, not really usable.

> Also watch top and see you're not maxing out your CPU ...

This I would need to try again to confirm that.

> 
> Regards,
> 
> Hans