Displaying 20 results from an estimated 1000 matches similar to: "Problems running virtual machines after an upgrade"
2023 May 12
1
Question regaring correct usage of CPU shares
Hi there,
I have a question regarding the shares option of the cputune section. I
want to illustrate my question with the following example. Let's assume
I have two virtual machines like the following on four dedicated core
with two threads each:
VM1:
<cputune>
<shares>512</shares>
<vcpupin vcpu="0" cpuset="0"/>
<vcpupin
2018 Sep 17
0
Re: NUMA issues on virtualized hosts
Hello,
so the current domain configuration:
<cpu mode='host-passthrough'><topology sockets='8' cores='4' threads='1'/><numa><cell cpus='0-3' memory='62000000' /><cell cpus='4-7' memory='62000000' /><cell cpus='8-11' memory='62000000' /><cell cpus='12-15'
2018 Sep 14
0
Re: NUMA issues on virtualized hosts
Hello,
ok, I found that cpu pinning was wrong, so I corrected it to be 1:1. The issue
with iozone remains the same.
The spec is running, however, it runs slower than 1-NUMA case.
The corrected XML looks like follows:
<cpu mode='host-passthrough'><topology sockets='8' cores='4' threads='1'/><numa><cell cpus='0-3'
2018 Sep 14
1
Re: NUMA issues on virtualized hosts
Hello again,
when the iozone writes slow. This is how slabtop looks like:
62476752 62476728 0% 0.10K 1601968 39 6407872K buffer_head
1000678 999168 0% 0.56K 142954 7 571816K radix_tree_node
132184 125911 0% 0.03K 1066 124 4264K kmalloc-32
118496 118224 0% 0.12K 3703 32 14812K kmalloc-node
73206 56467 0% 0.19K 3486 21
2012 Apr 13
3
Guests can't connect to each other
Hi,
I'm using libvirt and qemu on Debian Wheezy. I'm having a strange
behavior. Guests can't connect to each other when they're on the same
host.
On the host I'm using bonding (in active / backup mode) and vlan. It
looks like this :
eth0 \ / macvtap0
bond0 --- vlan222
eth1 / \ macvtap1
So I've got two guests, let's say A and B. When
2018 Sep 17
2
Re: NUMA issues on virtualized hosts
On 09/14/2018 03:36 PM, Lukas Hejtmanek wrote:
> Hello,
>
> ok, I found that cpu pinning was wrong, so I corrected it to be 1:1. The issue
> with iozone remains the same.
>
> The spec is running, however, it runs slower than 1-NUMA case.
>
> The corrected XML looks like follows:
[Reformated XML for better reading]
<cpu mode="host-passthrough">
2017 Apr 19
2
virsh error: driver is not whitelisted
Hi,
I'm using virsh to instance a VM in my environment, but I'm running on
some issues. I created the following domain file:
<domain type='kvm'>
<name>demovm</name>
<uuid>4a9b3f53-fa2a-47f3-a757-dd87720d9d1d</uuid>
<memory unit='KiB'>4194304</memory>
<currentMemory
2018 Sep 18
1
Re: NUMA issues on virtualized hosts
On 09/17/2018 04:59 PM, Lukas Hejtmanek wrote:
> Hello,
>
> so the current domain configuration:
> <cpu mode='host-passthrough'><topology sockets='8' cores='4' threads='1'/><numa><cell cpus='0-3' memory='62000000' /><cell cpus='4-7' memory='62000000' /><cell cpus='8-11'
2018 Sep 14
3
NUMA issues on virtualized hosts
Hello,
I have cluster with AMD EPYC 7351 cpu. Two CPUs per node. I have performance
8-NUMA configuration:
This is from hypervizor:
[root@hde10 ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 64
On-line CPU(s) list: 0-63
Thread(s) per core: 2
Core(s) per socket: 16
Socket(s): 2
NUMA
2012 Apr 18
1
Problems using latest qemu-kvm and latest libvirt ( hvm missing )
Hi all
I have faced this issue already and the solution was to go back to a
old version of qemu-kvm and/or libvirt and things start falling into
place but this time I would want to solve this.
I have used these versions as per the o/p of the commands below. To
jumpstart a new machine which is libvirt capable, it always is a hastle
to find out which of the version combination of
2017 Apr 26
0
Re: Tunnelled migrate Windows7 VMs halted
On Wed, Apr 26, 2017 at 08:51:39AM -0500, Eric Blake wrote:
> >
> > I migrated a Windows 7 VM with libvirtd tunnelled, the VM halted
> > on the target although the status is running.
What do you mean by halted ? The guest OS has shutdown, or QEMU
has crashed, or something else ?
> >
> >
> > [root@test15 ~]# virsh migrate --live --p2p --tunnelled
2013 Jun 14
0
can virsh set the cpuset attribute of <vcpu ..> (CPU Allocation) ?
Is it possible to use virsh to set the cpuset attribute of the CPU
Allocation element in a domain ?
<domain>
...
<vcpu placement='static' cpuset="1-4,^3,6" current="1">2</vcpu>
...
</domain>
I have seen that virsh vcpupin and virsh emulatorpin can be used to query
and set
the cpusets of the <vcpupin> and <emulatorpin>
2014 Feb 12
2
Re: Help? Running into problems with migrateToURI2() and virDomainDefCheckABIStability()
On 02/11/2014 04:45 PM, Cole Robinson wrote:
> On 02/10/2014 06:46 PM, Chris Friesen wrote:
>> Hi,
>>
>> We've run into a problem with libvirt 1.1.2 and are looking for some comments
>> on whether this is a bug or design intent.
>>
>> We're trying to use migrateToURI() but we're using a few things (numatune,
>> vcpu mask, etc.) that may need
2023 Sep 21
2
Help ! libvirt
Adding libvirt mailing list
apologies for cross-posting
libvirt version: 9.7.0-1
On Thu, Sep 21, 2023 at 8:39?AM john doe <johndoe65534 at mail.com> wrote:
> On 9/21/23 09:32, Bhasker C V wrote:
> > I am getting an error with libivrt when I create a VM
> >
> > ```
> > $ sudo virsh create ./win11.xml
> > error: Failed to create domain from ./win11.xml
>
2015 Sep 06
3
hvm on x86_64 on binutils i386
Hi,
I have this setup
kernel: x86_64 version 4.2.0
operating system (rootfs binutils etc.,) : i386 (ELF-32-bit)
qemu-system : version 2.4.0 qemu-system-x86_64 (i386 binary)
libvirt: 1.2.19 (i386 )
When I run the qemu-system-x86_64 binary with --enable-kvm, the guest
machine is working properly as hvm. So
QEMU can run x86_64 OS as hvm
when I install using virt-install
virt-install --name
2003 Jun 30
2
Problem with decoding number of codebooks
Hello,
I'm trying to write a Vorbis decoder (just as a hobby) but I've got a
problem with reading the setup header. According to the Vorbis
documentation the first data that should be read after the initial
'vorbis' string is an eight bit integer which when incremented by one,
contains the number of codebooks in the header. My problem is that
whenever I read this number it seems
2023 Sep 21
1
Help ! libvirt
Hi,
I have tried that too and that did not help either (i.e adding the format
type=gpt)
The output you requested
```
$ sudo qemu-img info --backing-chain /var/virt/WINDOWS/WIN11
image: /var/virt/WINDOWS/WIN11
file format: qcow2
virtual size: 60 GiB (64424509440 bytes)
disk size: 55.1 GiB
cluster_size: 65536
backing file: WIN11-BASE (actual path: /var/virt/WINDOWS/WIN11-BASE)
backing file
2017 Apr 26
3
Tunnelled migrate Windows7 VMs halted
[moderator note: I'm forwarding a stripped down version of the original
mail which was rejected in the moderator queue. I stripped the 3.3
megabyte .tar.bz2 of the log file attachment, which is inappropriate for
a technical list. Either trim the log to the relevant portion, or host
the log externally and have your list email merely give a URL of the
externally-hosted file]
>
2023 Sep 21
1
Help ! libvirt
Attaching win11.xml
Please note that this used to work fine. It is failing now on libvirt-
9.7.0-1
On Thu, Sep 21, 2023 at 9:13?AM Peter Krempa <pkrempa at redhat.com> wrote:
> On Thu, Sep 21, 2023 at 09:05:43 +0100, Bhasker C V wrote:
> > Adding libvirt mailing list
> > apologies for cross-posting
> > libvirt version: 9.7.0-1
> >
> > On Thu, Sep 21, 2023
2016 May 13
0
vcpupin vs taskset performance difference
Hi all,
I am trying to run some performance tests using libvirt 1.2.17. For these tests it is necessary to set a specific affinity for the VCPUs of a running VM.
The problem is, that I noticed a significant performance drop in my metrics when using 'vcpupin' from the virsh console instead of running 'taskset' natively.
Specifically the methods I am comparing are
1.