On Wed, 31 Jan 2018, Jarle Thorsen wrote:
> onsdag 31. januar 2018 10.50.09 UTC+1 skrev Jarle Thorsen følgende:
> > My netvm (Fedora 26 template) has a 10gbe network card, and from 
> > within the netwm I have no problem saturating the 10Gbit link using 
> > iperf to an external server.
> > However, in any vm sending traffic through this netvm I can only get 
> > around 2Gbit max using the same iperf command against the same server.
> > 
> > I have this problem both with appvms using the *same* Fedora template 
> > as the netvm, and also in Windows HVM.
> > 
> > Anybody have experience with Qubes in a 10Gbe network?
> 
> I do notice the the process ksoftirqd in the netvm is running at 100% 
> cpu during the iperf test from the appvm. I'm guessing this is related 
> to my problem? 

SG being disabled for the qubes inter-vm interfaces (due to an unknown 
reason as Marek didn't anymore remember the details for that change) might 
have some(/huge?) impact on performance as it prevents using some 
high-speed features of the kernel.


-- 
 i.

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