Thanks very much. I will upgrade the virt tools software on the host and check if it still happens.
Later, I hope I could update you guys. Thanks again.
Best regards
QianXi<DIV style="COLOR: #000"><DIV style="PADDING-RIGHT: 0px; PADDING-LEFT: 0px; FONT-SIZE: 12px; PADDING-BOTTOM: 2px; PADDING-TOP: 2px; FONT-FAMILY: Arial Narrow">------------------ 原始邮件 ------------------</DIV><DIV style="PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><DIV><B>发件人:</B> "Kashyap Chamarthy"<kchamart@redhat.com><wbr/></DIV><DIV><B>发送时间:</B> 2019年6月21日(星期五) 凌晨0:32</DIV><DIV><B>收件人:</B> "钱熙"<qianxi416@foxmail.com>;</DIV><DIV><B>抄送:</B> "openstack-discuss"<openstack-discuss@lists.openstack.org>;</DIV><DIV><B>主题:</B> Re: [nova]Bug #1829696: qemu-kvm process takes 100% CPU usage whenrunning redhat/centos 7.6 guest OS</DIV></DIV></DIV>On Thu, Jun 20, 2019 at 10:06:11PM +0800, 钱熙 wrote:<br/>> Hi there,<br/><br/>Hi,<br/><br/>> <br/>> I am struggling with qemu-kvm 100% CPU usage problem.<br/>> When running redhat or centos 7.6 guest os on vm,<br/>> the cpu usage is very low on vm(almost 100% idle when no tasks run), but on the host,<br/>> qemu-kvm reports 100% cpu busy usage.<br/>> <br/>> <br/>> https://bugs.launchpad.net/nova/+bug/1829696<br/>> I opened the bug above, however it did not find some interest.<br/>> <br/>> <br/>> After searching some related bugs report,<br/>> I suspect that it is due to the clock settings in vm's domain xml.<br/>> My settings are as follows:<br/>> <clock offset='utc'><br/>> <timer name='rtc' tickpolicy='catchup'/><br/>> <timer name='pit' tickpolicy='delay'/><br/>> <timer name='hpet' present='no'/><br/>> </clock><br/>> And details about the bug, please see https://bugs.launchpad.net/nova/+bug/1829696<br/><br/>I don't think it is related to clock settings at all.<br/><br/>> It shows that only the version 7.6 of redhat or centos affected by this bug behavior.<br/>> In my cluster, it is OK for versions from redhat or centos 6.8 to 7.5.<br/>> <br/>> <br/>> Any clue or suggestion?<br/><br/>Please see DanPB's response in comment#2; I agree with it. (Note that<br/>I've changed the bug component from 'openstack-nova' --> 'qemu')<br/><br/> https://bugs.launchpad.net/qemu/+bug/1829696/comments/2<br/><br/><br/>-- <br/>/kashyap<br/>