Hello. We use our highly load system in OpenStack environment. And faced
with serious problems in network highload guests. At a relatively high
CPU load of hypervisor (40-60%) virtual network interfaces of this
guests starts to droppart of the packets. We use for virtualization
qemu-kvm with vhost driver: "... -netdev
tap,fd=30,id=hostnet0,vhost=on,vhostfd=31 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:86:67:7b,bus=pci.0,addr=0x3...".
The problem can be seen with the ifconfig utility:
tape4009073-0b Link encap:Ethernet HWaddr fe:16:3e:86:67:7b
inet6 addr: fe80::fc16:3eff:fe86:677b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1587622634 errors:0 dropped:0 overruns:0 frame:0
TX packets:1484106438 errors:0 dropped:460259 overruns:0
carrier:0
collisions:0 txqueuelen:500
RX bytes:877878711500 (877.8 GB) TX bytes:3071846828531 (3.0
TB)
Could you do a little look at our problem and give advice which
direction to continue our investigation?
--
С уважением,
Михаил Казаков
Старший системный администратор
OOO "СПЛАТ"
