similar to: Changing CPU cache size of guest

Hi list, in virt-manager ver. 2.2.1 (fully upgraded CentOS 8.1), the CPU model list only shows ancient CPU (the most recent is Nehalem-IBRS). On the other hand, in virt-manager 1.5.x (fully upgraded CentOS 7.8) we have a rich selection of CPU (as recent as Icelake). Why was the list in newer virt-manager so much trimmed? Is it possible to enlarge it? Thanks. -- Danti Gionatan Supporto

Folks, I am having major performance issue with my Erlang application running on openstack KVM hypervisor and after so many test i found something wrong with my KVM guest CPU Topology This is KVM host - http://paste.openstack.org/show/790120/ This is KVM guest - http://paste.openstack.org/show/790121/ If you carefully observe output of both host and guest you can see guest machine threads has

My system is a dual Xeon E5540 (Nehalem) HP Proliant DL380G6. When switching between Xen 4.0.2-rc1-pre and Xen 4.1-unstable I noticed that the NUMA info as shown by the Xen ''u'' debug-key is different. More specifically, the CPU to node mapping is alternating for 4.0.2 and grouped sequentially for 4.1. This difference affects the allocation (wrt node/socket) of pinned VCPUs to the

Hi, all. I posted this message to libvir-list last night, but just realized that was geared toward development rather than support. Apologies to those who are subscribed to both for the dupe. I'm having a weird problem where libvirt/qemu/kvm won't let me use the model processor I have defined in my domain's config file. Instead, I get the error message in libvirtd.log that:

QEMU's default qcow2 L2 cache size is too small for large images (and small cluster sizes), resulting in very bad performance. https://blogs.igalia.com/berto/2015/12/17/improving-disk-io-performance-in-qemu-2-5-with-the-qcow2-l2-cache/ shows huge performance hit for a 20GB qcow2 with default 64kB cluster size: L2 Cache, MiB Average IOPS 1 (default) 5100 1.5

Hallo list, i am testing a Dell M610 with two quadcore Intel Nehalem CPUs at the moment, so with Hyper-Threading 16 cores in total. As mentioned in the subject I am using Ubuntu 8.04 64Bit and Xen 3.2 from Ubuntu package. During these tests I hit on some issues, which are not clear to me. I would be thankful for any comments/hints/thoughts on the following topics: 1. I recognized that

On May 10, 2010, at 9:07 PM, NAKAMURA Takumi wrote: > Hello. This is my 1st post. ようこそ！ > I have tried SSE execution domain fixup pass. > But I am not able to see any improvements. Did you actually measure runtime, or did you look at assembly? > I expect for the example below to use MOVDQA, PAND &c. > (On nehalem, ANDPS is extremely slower than PAND) Are you sure? The

Dear Xen Community, today we tried to upgrade our base server from a Xeon E5430 to a Xeon X5570 (Nehalem). This worked fine so far, but our DomUs with Kernel 2.6.27 no longer boot - they start up until the following message appears: [..] Mount-cache hash table entries: 256 Initializing cgroup subsys ns Initializing cgroup subsys cpuacct Initializing cgroup subsys memory Initializing cgroup

Hello. This is my 1st post. I have tried SSE execution domain fixup pass. But I am not able to see any improvements. I expect for the example below to use MOVDQA, PAND &c. (On nehalem, ANDPS is extremely slower than PAND) Please tell me if something would be wrong for me. Thank you. Takumi Host: i386-mingw32 Build: trunk at 103373 foo.ll: define <4 x i32> @foo(<4 x i32> %x,

I''m experiencing total grant table corruption on a system and I''m hoping my symptoms will ring a bell with a member of the Xen developer community. The setup is Xen 4.0.0-RC2 (OpenSUSE 11.2 package) on a Nehalem system. The sole guest instance is 64bit FreeBSD running in HVM mode, a single vcpu, and a PCI passed-through LSI Logic 1068e SAS controller. FreeBSD is running

>> In short: there is no (live) migration support for nested VMX yet. So as >> soon as your guest is using VMX itself ("nVMX"), this is not expected to >> work. > > Hi David, thanks for getting back to us on this. Hi Florian, (sombeody please correct me if I'm wrong) > > I see your point, except the issue Kashyap and I are describing does > not

On 07.02.2018 16:31, Kashyap Chamarthy wrote: > [Cc: KVM upstream list.] > > On Tue, Feb 06, 2018 at 04:11:46PM +0100, Florian Haas wrote: >> Hi everyone, >> >> I hope this is the correct list to discuss this issue; please feel >> free to redirect me otherwise. >> >> I have a nested virtualization setup that looks as follows: >> >> - Host:

Hey guys, I''m trying to get a gentoo dom0 running on some new Nehalem boxes. Our dozen or so existing servers run a xenified 2.6.21, but we can''t get the new Intel network chipset working with it. So, I''m giving a pv_ops dom0 from xen-tip/master a go, and Xen 3.4.1 to go with it. rebase/master is a bit too bleeding edge for me. So far, it''s working great.

27 нояб. 2015 г. 14:15 пользователь "Martin Kletzander" <mkletzan@redhat.com> написал: > > On Fri, Nov 20, 2015 at 04:31:56PM +0100, Piotr Rybicki wrote: >> >> Hi. >> >> I would like to workaround a bug, when after live-migration of KVM >> guest, there is a 100% steal time shown in guest. >> >> I've read, that disabling

I have recently upgraded to 2.6.18-194.3.1.el5 and within several days the machine crashed with the following error (repeating in mcelog): MCE 0 HARDWARE ERROR. This is *NOT* a software problem! Please contact your hardware vendor CPU 2 BANK 8 MISC 41 MCG status: MCi status: Error overflow Uncorrected error MCi_MISC register valid Processor context corrupt MCA: MEMORY CONTROLLER AC_CHANNEL0_ERR

Hi everyone, I hope this is the correct list to discuss this issue; please feel free to redirect me otherwise. I have a nested virtualization setup that looks as follows: - Host: Ubuntu 16.04, kernel 4.4.0 (an OpenStack Nova compute node) - L0 guest: openSUSE Leap 42.3, kernel 4.4.104-39-default - Nested guest: SLES 12, kernel 3.12.28-4-default The nested guest is configured with

An inherited system has the following configuration: passdb backend = ldapsam:ldap://10.10.10.10 smbpasswd guest What is the purpose of using multiple backends? The smb.conf man page simply states that each backend will be searched in turn but why would one ever use such a setup? Secondly, the man page does not mention the 'guest' backend. To me such a backend implies that an

Hello, Is there any way for a pass to determine the L1 or L2 cacheline size of the target before the IR is lowered to machine instructions? Thanks, -- Nick Johnson

John R Pierce <pierce at hogranch.com> writes: > On 10/1/2017 8:38 AM, hw wrote: >> HP says that what they call "NUMA split mode" should be disabled in the >> BIOS of the Z800 workstation when running Linux. They are reasoning >> that Linux kernels do not support this feature and even might not boot >> if it?s enabled. > > hmm, that workstation is

Hello, i´ve got a new Intel Nehalem server with an i7-920 CPU. I installed a Debian Lenny OS ... Now, i cannot find any images for hypervisor or kernel that seem to be runable on that hardware. :-O All of that is AMD: apt-cache search hypervisor linux-image-2.6-xen-amd64 - Linux 2.6 image on AMD64, oldstyle Xen support linux-image-xen-amd64 - Linux image on AMD64, oldstyle Xen support