[OmniOS-discuss] ping rtt for KVM in zone

[Dominik Hassler]

Matthew,

I have 'Intel I350' nics. It is not about virtio performance in general but the difference whether the *same* KVM runs in the GZ or in a NGZ.

> Gesendet: Mittwoch, 13. Mai 2015 um 11:11 Uhr
> Von: "Matthew Lagoe" <matthew.lagoe at subrigo.net>
> An: "'Dominik Hassler'" <hasslerd at gmx.li>, omnios-discuss at lists.omniti.com
> Betreff: RE: [OmniOS-discuss] ping rtt for KVM in zone
>
> Some nic's don’t handle the virtio stuff very well (myricom im looking at you) so that could be part of the problem
> 
> Intel typically is pretty good about it however so the e1000's working doesn’t surprise me.
> 
> What nics are you specifically having issues with that have the extra delay?
> 
> -----Original Message-----
> From: OmniOS-discuss [mailto:omnios-discuss-bounces at lists.omniti.com] On Behalf Of Dominik Hassler
> Sent: Wednesday, May 13, 2015 02:03 AM
> To: omnios-discuss at lists.omniti.com
> Subject: [OmniOS-discuss] ping rtt for KVM in zone
> 
> Hi,
> 
> I am running my KVMs in individual zones and seeing an increased ping rtt by a factor of approx. 7 compared to ping rtt when running the same KVM inside the GZ (cf. attached smokeping chart).
> 
> This does *only* affect virtio nics but not e1000 nics. For e1000 nics the ping rtt remains the same, no matter if the KVM runs in the GZ or a NGZ.
> 
> Dan's 'KVM Performance Update' did resolve the throughput issue, but not the strange ping behaviour I am seeing.
> 
> Any ideas why it only affects virtio nics and when the KVM is in a zone? Any ideas how to improve it?
> 
> 
>