similar to: More vcpus than physical cores and hvm

Hello, i have just migrated machine to xen server where only 2 cpus are available. I have copied config from machine where domU was located before. That machine had 4 CPUS (QUADCORE), current machine has 2 CPUS (1 XEON 2cores). I have forgot to change vcpus from 4 to 2 in config, but .. what really surprised me ... machine started . How it is possible? It was really slow alltought and not

Hi List, I''m new on the Xen Virtual Machines world, I did a search around looking for a solution on this problem and I could find anything I''ve a new server Dell R900 (Two QuadCore 2.93Ghz, 32GB Ram) where the following message appear when I try to boot any DomU guest machine: ERROR: Not a Xen-ELF image: No ELF notes or ''__xen_guest'' section found. ERROR:

Hi Daniel, Thanks a lot for the quick and detailed explanation. Please see my another query below. >>In normal usage, the guest vCPUs will be floating arbitrarily across any >>host physical CPUs. So trying to match host / guest topology is not only >>useless, it might actually degrade your performance - eg if you give the >>guest 1 socket, 1 core and 2 threads, but he

Hello Everyone, I am hoping I can get some help with how vCPUs work with weights and caps 1. If I have a domU with 2 vCPUs and a weight of 256, does the weight double (512) or is this 256 time slice across both vCPUs. If the weight does not double, how is it beneficial to have multiple vCPUs? 2. If the domU has 2vCPUs and a cap of 100% how does this work since 100% is a mex of one physical

Hi, I am using Xen 4 under Debian Squeeze. I want to use Windows 2008 x86 with HVM, but only one vcpu allocated when vm started. After increasing vcpus number (vcpus = ''4'') in cfg, at start ignored that parameter, xm list VCPUs show only 1. Why does not able to increase the vcpus? Any idea?:) p.s: if using pvm linux, then the vcpus parameter is ok, increased successfully when I

My test box has an AMD dual core processor in it, giving me 2 physical cpu''s. If I overcommit the vcpu''s (eg vcpus=4) to simulate a 4 cpu machine, how accurate a simulation should it be (apart from performance sucking badly)? James _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

HI. Got a question. When I assign a number of vcpus to a DomU, Are they dedicated to that VM? For example: If I have 16 vcpus available and 8 DomUs, should I assign 2 vcpus for each one? or could I assign more vcpus (i.e. 6) and the hypervisor takes care of it? Thanks -- ---------------------------------------------------------- Luis R. Romano Estudiante de Ingeniería en Computación. FCEFyN -

Hi, I have been trying to get Hyperthreading to work in a Windows HVM on Xen 4.1.2 as described in ''xmexample.hvm''. I think I have set it up correctly, but I can''t seem to get it to work. There is not much documentation on it and most topics are from years ago. I''m curious to know to whether this functionality is still supposed to work. I''m aware that

Package: xen-hypervisor-3.2-1-amd64 Version: 3.2.1-2 Severity: normal I have a dual-core host. I wanted to give one of my guests use of 2 vcpus and use of both real cpus. I had the following in my config file for the guest: vcpus = 2 cpus = 0,1 This appeared to work correctly and I saw a big difference in the load average (the guest is monitored by munin-node). However after 12 hours or so,

Hi, i'm playing a bit around with vcpus. My guest is Windows 10 1903. This is the excerpt from the config: ... <vcpu placement='static' current='2'>4</vcpu> <vcpus> <vcpu id='0' enabled='yes' hotpluggable='no'/> <vcpu id='1' enabled='yes' hotpluggable='yes'/> <vcpu id='2'

Hi All, I am new here, please warn me If I am not following proper etiquette of this mailing list. I am breaking my head, regarding why libvirt is defining multiple CPU sockets when I increase the vCPU count. As and when I increase the vCPU count in libvirt guest XML, it is increasing the CPU sockets in qemu instance. " -smp 4,sockets=4,cores=1,threads=1 " instead " -smp

Hi Guys, in next week i plan to upgrade my Asterisk Server. To buy the optimal Hardware i have a question. What is better more cores (eg. 2x quadcore) or more CPU speed for a server that handle a lot of of Meetme Concerences with hundreds of concurrent G711 alaw Channels (no transcoding) ? in my opinion, more cores are better, because Asterisk ist multithreded and each channel has a good

Before I get to entrenched in the ACPI code - I thought I''d ping the community to make sure nobody else has investigated this already - Can we present cores vs sockets for guest VCPUs? Right now, the number of total processors can be specified, but can we specify cores per socket? I see this potentially being an hvmloader function, as part of its acpi build code. Could this be

On Tuesday 05 May 2015 15:13:16 Richard W.M. Jones wrote: > No functional change, just code refactoring. > --- > p2v/gui.c | 42 ++++++++++++++++++++++++++++++------------ > 1 file changed, 30 insertions(+), 12 deletions(-) > > diff --git a/p2v/gui.c b/p2v/gui.c > index 7e9de0d..bc762c2 100644 > --- a/p2v/gui.c > +++ b/p2v/gui.c > @@ -375,6 +375,8 @@ static void

Hi, i want to start domain with 2 cpus avail, but also have the opportunity to change on-the-fly the number of cpus to, for example, 4. in my domain.cfg i have: vcpus = 2 vcpu_avail = 7 The domain starts with 2 cpus, as expected, but rising the number does not work. It silently fails. Lowering the number works as expected. $ xm vcpu-set domain 3 $ xm list Name

My virtual machine xml file has <vcpu>2</vcpu> clause while the host has 2 physical cpus (cores). Is this enough to cause a VM running 2 endless loop threads to use the 2 cores ? In my case the VM running reports (cat /roc/cpuinfo) that it has 2 vcpus but it uses only 1 core (at a time) because the 'top' at the host shows 100%cpu (out of total 200%) used by the

When reducing the number of physical cpus available for Domain-0 by xl cpupool-numa-split, reduce the number of vcpus accordingly. Signed-off-by: juergen.gross@ts.fujitsu.com 1 file changed, 20 insertions(+), 2 deletions(-) tools/libxl/xl_cmdimpl.c | 22 ++++++++++++++++++++-- _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

----- On Feb 15, 2020, at 12:47 AM, Marc Roos M.Roos@f1-outsourcing.eu wrote: > Would you mind sharing your xml? I have strange high host load on idle > windows guest/domain <domain type='kvm'> <name>pathway</name> <uuid>8235e5ae-0756-4286-5407-9fa02d372046</uuid> <description>Pathway Studio Dietrich</description> <memory

Hello I have trouble with Quard Core Opteron and windows 2008(x86). By the way Windows device manager show 4 processors, BUT task manager show only one core. I found that my problem is not new. But solutions, provided by those people did not helped me. By the way, my windows is enterprise version, and as far as I know, it allows up to 8 processor sockets, so the trouble is not, that windows

Hi, This patch intends to accurate vcpu weighting for CPU intensive job. The reason of this problem is that vcpu round-robin queue blocks large weight vcpus by small weight vcpus. For example, we assume following case on 2pcpu environment. (with 4domains (each domain has 2vcpus)) dom1 vcpu0,1 w128 credit 4 dom2 vcpu0,1 w128 credit 4 dom3 vcpu0,1 w256 credit 8 dom4 vcpu0,1 w512 credit 15