RE: Slow network performance with KVM

-Original Message- From: Bob Proulx [mailto:b...@proulx.com] Sent: Tuesday, December 18, 2012 8:27 PM To: debian-user@lists.debian.org Subject: Re: Slow network performance with KVM You might also want to try the backported newer versions of libvirt-bin kvm packages

RE: Slow network performance with KVM

-Original Message- From: Bob Proulx [mailto:b...@proulx.com] Sent: Monday, December 17, 2012 8:15 PM To: debian-user@lists.debian.org Subject: Re: Slow network performance with KVM I forgot that this module is only available in later kernels! Sorry. It does not appear in Squeeze

Re: Slow network performance with KVM

Katynski, Bogdan wrote: Bob Proulx wrote: On Squeeze you would want to use a backported 3.2 kernel. It would be worthwhile to try it if you are suffering from this performance problem. Here are instructions: I installed the backported 3.2.0 kernel and forced vhost-net module load

RE: Slow network performance with KVM

-Original Message- From: Bob Proulx [mailto:b...@proulx.com] Sent: Saturday, December 15, 2012 5:54 AM To: debian-user@lists.debian.org Subject: Re: Slow network performance with KVM Katynski, Bogdan wrote: I noticed a rather poor network guest-guest performance. Have you

Re: Slow network performance with KVM

Katynski, Bogdan wrote: Bob Proulx wrote: What is the output: $ lsmod | grep vhost_net I don't have the module loaded and what's worse - I don't have this module :( root@vmhost:~# modprobe vhost-net FATAL: Module vhost_net not found. ... I don't have these options In my kvm

Re: Slow network performance with KVM

Katynski, Bogdan wrote: I noticed a rather poor network guest-guest performance. Have you loaded the vhost-net kernel module? It is a huge lever for network performance. What is the output: $ lsmod | grep vhost_net Here are a couple of references:

Re: Very slow network performance with KVM using virtio and tap.

Thanks for the links. I followed the first one when I set these up initially. I never got virt-install to work right. I create the xml file and the disk image manually. I then just use virsh for define, start and stop. My problem is the network performance is the same

Very slow network performance with KVM using virtio and tap.

I have tried a KVM setup 2 different ways. The first was using a straight bridge without using tap at all. The WinXP VM is using the latest known version of the virtio drivers. The bridge is on a gigabit nic. The second setup was using a bridge containing a tap0

Re: Very slow network performance with KVM using virtio and tap.

Robert, following http://www.howtoforge.com/virtualization-with-kvm-on-a-debian-squeeze-server i reach to the conclusion that using kvm network config is "troublesome". I ended using "--network=bridge:br0 " on startup the vm, with qemu . Anyway, from another