I've tried the kernel-lt with same results. For kernel-ml, the baremetal wasn't able to boot at that time. În mar., 23 aug. 2016 la 02:22, Adi Pircalabu <adi at ddns.com.au> a scris: > Laurentiu, > > Just to chip in, without thoroughly checking the thread (which I'd like > to apologize in advance for): have you tried to test other kernel > instead of the stock one? You can have a look at > http://elrepo.org/tiki/kernel-ml and http://elrepo.org/tiki/kernel-lt > and use them for some comparison testing. > Cheers, > > --- > Adi Pircalabu > > On 22-08-2016 18:31, Laurentiu Soica wrote: > > No luck with qemu-kvm-ev, the behavior is the same. Running perf > > record -a -g on the baremetal shows that most of the CPU time is in > > _raw_spin_lock > > > > Children Self Command Shared Object > > Symbol > > - 93.62% > > 93.62% qemu-kvm [kernel.kallsyms] [k] > > _raw_spin_lock > > > > > > - _raw_spin_lock > > > > > > + 45.30% kvm_mmu_sync_roots > > > > > > + 28.49% kvm_mmu_load > > > > > > + 25.00% mmu_free_roots > > > > > > + 1.12% tdp_page_fault > > > > În joi, 18 aug. 2016 la 11:59, Laurentiu Soica a > > scris: > > > >> I've tried with KSM disabled and nothing changed. > >> > >> I've upgraded KVM to qemu-kvm-ev. I'm waiting to see if there are > >> any improvements and report back. > >> > >> În mie., 17 aug. 2016 la 15:10, Boris Derzhavets > >> <bderzhavets at hotmail.com> a scris: > >> > >> For myself KSM is unpredictable feature. The problem is Compute, > >> just this node > >> > >> does "copy on write" , so only Compute. > >> > >> My concern exactly is where would it lead to worse or better Guest > >> behavior ? > >> > >> I am not expecting complete fix. I would track via top/htop and > >> dmesg via Cron on 1-2 hr > >> > >> period. > >> > >> ------------------------- > >> > >> FROM: centos-virt-bounces at centos.org > >> <centos-virt-bounces at centos.org> on behalf of Laurentiu Soica > >> <laurentiu at soica.ro> > >> > >> SENT: Wednesday, August 17, 2016 6:38 AM > >> > >> TO: Discussion about the virtualization on CentOS > >> SUBJECT: Re: [CentOS-virt] Nested KVM issue > >> > >> Both baremetal and compute ? Are there any other metrics do you > >> consider useful to collect for troubleshooting purposes ? > >> > >> În mie., 17 aug. 2016 la 13:04, Boris Derzhavets > >> a scris: > >> > >> It sounds weird, but attempt to disable KSM and see would it help or > >> no ? > >> > >> ------------------------- > >> > >> FROM: centos-virt-bounces at centos.org > >> <centos-virt-bounces at centos.org> on behalf of Laurentiu Soica > >> > >> SENT: Wednesday, August 17, 2016 4:56 AM > >> > >> TO: Discussion about the virtualization on CentOS > >> SUBJECT: Re: [CentOS-virt] Nested KVM issue > >> > >> Enabled the logging on both compute and baremetal. Nothing strange > >> in logs: > >> > >> on baremetal : > >> > >> Wed Aug 17 11:51:01 EEST 2016: committed 62310764 free 58501808 > >> Wed Aug 17 11:51:01 EEST 2016: 87025667 < 123574516 and free > > >> 24714903, stop ksm > >> > >> on compute: > >> > >> Wed Aug 17 08:52:52 UTC 2016: committed 24547132 free 76730936 > >> Wed Aug 17 08:52:52 UTC 2016: 45139624 < 102962460 and free > > >> 20592492, stop ksm > >> > >> and the compute node is again at 100% CPU utilization. > >> > >> În mar., 16 aug. 2016 la 15:26, Boris Derzhavets > >> a scris: > >> > >> I would enable ksmtuned logging ,if it has been done verify logs > >> > >> ------------------------- > >> > >> FROM: centos-virt-bounces at centos.org > >> <centos-virt-bounces at centos.org> on behalf of Laurentiu Soica > >> > >> SENT: Tuesday, August 16, 2016 7:16 AM > >> > >> TO: Discussion about the virtualization on CentOS > >> SUBJECT: Re: [CentOS-virt] Nested KVM issue > >> > >> Yes. It is on both baremetal and compute node. > >> > >> _______________________________________________ > >> CentOS-virt mailing list > >> CentOS-virt at centos.org > >> https://lists.centos.org/mailman/listinfo/centos-virt > > _______________________________________________ > > CentOS-virt mailing list > > CentOS-virt at centos.org > > https://lists.centos.org/mailman/listinfo/centos-virt > > > > -- > > > > Laurentiu Soica > > _______________________________________________ > > CentOS-virt mailing list > > CentOS-virt at centos.org > > https://lists.centos.org/mailman/listinfo/centos-virt > -- Laurentiu Soica -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20160823/21b5ae6d/attachment-0006.html>