From: Michael Kazakov <michael@marathonbet.ru>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] Packet dropps in virtual tap interface
Date: Tue, 24 Feb 2015 10:15:11 +0300 [thread overview]
Message-ID: <54EC24FF.3000407@marathonbet.ru> (raw)
In-Reply-To: <54E706ED.4040804@marathonbet.ru>
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"
next parent reply other threads:[~2015-02-24 7:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <54E706ED.4040804@marathonbet.ru>
2015-02-24 7:15 ` Michael Kazakov [this message]
2015-02-24 7:18 ` Packet dropps in virtual tap interface Michael Kazakov
2015-02-24 17:03 ` Rick Jones
2015-02-25 10:11 ` Michael Kazakov
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