Re: [CentOS-virt] very low performance of Xen guests

2020-06-15 Thread Adi Pircalabu via CentOS-virt
and active You can also test running your Linux domUs as Xen PVH [1], which requires kernel 4.11 and Xen 4.10 as a minimum. [1] https://wiki.xenproject.org/wiki/Linux_PVH -- Adi Pircalabu ___ CentOS-virt mailing list CentOS-virt@centos.org https

Re: [CentOS-virt] very low performance of Xen guests

2020-06-14 Thread Adi Pircalabu via CentOS-virt
during the last week's tests. - I've tested with 1, 2, 4 and 8 VCPUs . There is no diff for the real life apps. Wolfy, to begin with, can you try the kernel-xen package from https://xen.crc.id.au/support/guides/install/ with the CPU vulnerability mitigations turned off for both dom0 and domU? -- Adi

Re: [CentOS-virt] kernel-ml-4.15.0-1.el7.elrepo.x86_64 doesn't boot as Xen PV domU

2018-01-30 Thread Adi Pircalabu
) (XEN) (XEN) --- Adi Pircalabu On 31-01-2018 10:37, Adi Pircalabu wrote: Hi, has anyone

[CentOS-virt] kernel-ml-4.15.0-1.el7.elrepo.x86_64 doesn't boot as Xen PV domU

2018-01-30 Thread Adi Pircalabu
c (XEN) Submitted to ELRepo as http://elrepo.org/bugs/view.php?id=820 -- Adi Pircalabu, System Administrator DDNS, a Total Internet Company 159 Barkly Avenue, Burnley, Vic 3121, T +61 3 9815 6868 ___

Re: [CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set triggers domU kernel WARNING, then domU becomes unresponsive

2017-12-19 Thread Adi Pircalabu
r I've just found domU is recoverable by reverting to the previous number of vcpus when it's blocked. --- Adi Pircalabu On 12/11/2017 06:52 PM, Adi Pircalabu wrote: Has anyone seen this recently? I couldn't replicate it on: - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64, kernel-lt-4

Re: [CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set triggers domU kernel WARNING, then domU becomes unresponsive

2017-12-14 Thread Adi Pircalabu
On 15-12-2017 9:01, Adi Pircalabu wrote: On 15-12-2017 4:10, Akemi Yagi wrote: On Mon, Dec 11, 2017 at 4:52 PM, Adi Pircalabu <a...@ddns.com.au> wrote: Has anyone seen this recently? I couldn't replicate it on: - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64, kernel-lt-4.4.105

Re: [CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set triggers domU kernel WARNING, then domU becomes unresponsive

2017-12-14 Thread Adi Pircalabu
On 15-12-2017 4:10, Akemi Yagi wrote: On Mon, Dec 11, 2017 at 4:52 PM, Adi Pircalabu <a...@ddns.com.au> wrote: Has anyone seen this recently? I couldn't replicate it on: - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64, kernel-lt-4.4.105-1.el6.elrepo.x86_64 - CentOS 7 running 4.9.67

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set triggers domU kernel WARNING, then domU becomes unresponsive

2017-12-11 Thread Adi Pircalabu
ec9a330c7 ]--- -CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 end here- -- Adi Pircalabu ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt

Re: [CentOS-virt] Xen CentOS 7.3 server + CentOS 7.3 VM fails to boot after CR updates (applied to VM)!

2017-09-14 Thread Adi Pircalabu
On 14-09-2017 20:57, Adi Pircalabu wrote: On 08-09-2017 6:17, Kevin Stange wrote: On 09/06/2017 05:21 PM, Kevin Stange wrote: On 09/06/2017 08:40 AM, Johnny Hughes wrote: On 09/05/2017 02:26 PM, Kevin Stange wrote: On 09/04/2017 05:27 PM, Johnny Hughes wrote: On 09/04/2017 03:59 PM, Kevin

Re: [CentOS-virt] NIC Stability Problems Under Xen 4.4 / CentOS 6 / Linux 3.18

2017-03-28 Thread Adi Pircalabu
checksumming turned off. xen_commandline: dom0_mem=1536M,max:2048M dom0_max_vcpus=1 dom0_vcpus_pin cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all --- Adi Pircalabu ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.cen

Re: [CentOS-virt] NIC Stability Problems Under Xen 4.4 / CentOS 6 / Linux 3.18

2017-02-14 Thread Adi Pircalabu
On 14-02-2017 5:08, Kevin Stange wrote: On 02/12/2017 05:07 PM, Adi Pircalabu wrote: [...] Thanks for the heads-up Kevin, appreciated. One thing I need to clarify, though: what kernel was this machine running at the time? Kernel running at the time was the Virt SIG's 3.18.44-20 kernel

Re: [CentOS-virt] NIC Stability Problems Under Xen 4.4 / CentOS 6 / Linux 3.18

2017-02-12 Thread Adi Pircalabu
On 11/02/17 06:29, Kevin Stange wrote: On 01/30/2017 06:41 PM, Kevin Stange wrote: On 01/30/2017 06:12 PM, Adi Pircalabu wrote: On 31/01/17 10:49, Kevin Stange wrote: You said 3.x kernels specifically. The kernel on Xen Made Easy now is a 4.4 kernel. Any chance you have tested with that one

Re: [CentOS-virt] NIC Stability Problems Under Xen 4.4 / CentOS 6 / Linux 3.18

2017-01-31 Thread Adi Pircalabu
On 31/01/17 21:00, Jinesh Choksi wrote: On 30 January 2017 at 22:17, Adi Pircalabu wrote: May I chip in here? In our environment we're randomly seeing: Jan 17 23:40:14 xen01 kernel: ixgbe :04:00.1 eth6: Detected Tx Unit Hang Someone in this thread: https://sourceforge.net/p

Re: [CentOS-virt] NIC Stability Problems Under Xen 4.4 / CentOS 6 / Linux 3.18

2017-01-30 Thread Adi Pircalabu
ike a yo-yo so far. So far the one hypervisor with pci=nomsi has been quiet but that doesn't mean it's fixed. I need to give it 6 weeks or so. :) It'd be more like 6-9 months for us, making it terrible to debug it :-/ Adi Pircalabu ___ CentOS-vir

Re: [CentOS-virt] Nested KVM issue

2016-08-22 Thread Adi Pircalabu
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