On 05/20/11 03:12, Алексей Кашин wrote: > Hi. > Server with two gigabit NIC's. I'm trying to setup a bridge with a > bonded device (2 links,balance-rr). > host# cat /etc/network/interfaces > auto lo > iface lo inet loopback > > auto bond0 > iface bond0 inet manual > slaves eth0 eth1 > bond_mode balance-rr > bond_miimon 100 > bond_updelay 200 > bond_downdelay 200 > > auto br0 > iface br0 inet static > address <ip> > netmask <netmask> > gateway <gateway> > bridge_ports bond0 > bridge_stp off > bridge_fd 0 > bridge_maxwait 0 > > host# cat /etc/modprobe.d/bonding.conf > alias bond0 bonding > > On this host I've created few kvm virtual machines. It's created with > next options. > > host# virt-install \ > --name="name" \ > --ram=512 \ > --arch=x86_64 \ > --vcpus=1 \ > --cpuset=0 \ > --os-type=linux \ > --os-variant="debiansqueeze" \ > --hvm \ > --virt-type kvm \ > --accelerate \ > --cdrom=/iso/debian-6.0.1a-amd64-netinst.iso \ > --disk path=/dev/vg00/name,bus=virtio,cache=none,format=raw,sparse=false > \ > --network bridge=br0,model=virtio \ > --autostart > > When I try to download a file I can see that the rate is very low: > > guest# wget http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso > --2011-05-20 12:47:16-- > http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso > Resolving mirror.yandex.ru... 213.180.204.183, 2a02:6b8:0:201::1 > Connecting to mirror.yandex.ru|213.180.204.183|:80... connected. > HTTP request sent, awaiting response... 200 OK > Length: 691011584 (659M) [application/x-iso9660-image] > Saving to: Б-°archlinux-2010.05-core-dual.isoБ-? > > 0% [ > ] 79,686 7.97K/s eta 20h 24m > > But, if i try to get this file from host machine, I can see that the > rate is normal: > > host# wget http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso > --2011-05-20 08:56:35-- > http://mirror.yandex.ru/archlinux/iso/2010.05/archlinux-2010.05-core-dual.iso > Resolving mirror.yandex.ru... 213.180.204.183, 2a02:6b8:0:201::1 > Connecting to mirror.yandex.ru|213.180.204.183|:80... connected. > HTTP request sent, awaiting response... 200 OK > Length: 691011584 (659M) [application/x-iso9660-image] > Saving to: Б-°archlinux-2010.05-core-dual.isoБ-? > > 21% [=================================> > ] 150,837,182 26.5M/s eta 24s > > > If I broke bonding in the host machine and try to setup bridging on > device eth0 without bonding, the rate in both host and virtual machine > is normal. Have you tried active-backup mode instead of balanced-rr for the bonding device? I have used that setup in the past and did not see any performance issues with it. David > > Host machine: > CPU: model name : Intel(R) Xeon(R) CPU E5504 @ 2.00GHz > KVM: > # dpkg -l | grep kvm > ii qemu-kvm 0.12.5+dfsg-5+squeeze1 > Full virtualization on x86 hardware > Kernel: > # uname -a > Linux unixmon 2.6.32-5-amd64 #1 SMP Mon Mar 7 21:35:22 UTC 2011 x86_64 GNU/Linux > Guests: > All guest - GNU/Debian 6.0.1a amd64 with 2.6.32-5-amd64 #1 SMP Mon Mar > 7 21:35:22 UTC 2011 x86_64 GNU/Linux kernel > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
