关于KVM装XP，运行一段时间后延迟很高问题

supermanlb

宿主机：centos6.3 x86 64
mem:32G
cpu:16

虚拟机：xp
mem:512M

现象 运行一段时间后 虚拟机网络延迟上千多，通过virt-manger进入虚拟机 非常卡 重启也很慢
查看日志

qemu-kvm: Could not find keytab file: /etc/qemu/krb5.tab: No such file or directory
Aug 26 10:32:13 r510 qemu-kvm: Could not find keytab file: /etc/qemu/krb5.tab: No such file or directory
Aug 26 10:37:27 r510 qemu-kvm: Could not find keytab file: /etc/qemu/krb5.tab: No such file or directory
Aug 26 10:41:33 r510 qemu-kvm: Could not find keytab file: /etc/qemu/krb5.tab: No such file or directory
Aug 27 02:07:28 r510 kernel: kvm: 5761: cpu0 unhandled wrmsr: 0x198 data 0
Aug 27 06:55:40 r510 kernel: kvm: 19084: cpu0 unhandled wrmsr: 0x198 data 0
Aug 27 09:49:47 r510 kernel: kvm: 5761: cpu0 unhandled wrmsr: 0x198 data 0
Aug 27 12:53:04 r510 kernel: kvm: 5761: cpu0 unhandled wrmsr: 0x198 data 0
Aug 27 14:13:01 r510 kernel: kvm: 32143: cpu0 unhandled wrmsr: 0x198 data 0