similar to: How to insert vcpupin in guest xml file

On 07/19/2013 04:51 PM, Peeyush Gupta wrote: > Hi all, > > I am trying to add vcpupin in the guest xml file. I am working with > openstack and the code I have is python bound. I investigated through > the code and found that the elemets in xml file are set in > get_guest_config function. Now the thing is I am not able to set > vcpupin element. I mean I tried

Hi all, I am working with libvirt and I am trying to set cpu affinity. Now I can always use      virsh vcpupin <domain_name> <vcpu> <pcpu> to pin vcpus to pcpus. I want to do it using Python API. Now, there is function pinVcpu which is supposed to do that. But this is not working. For example I gave      dom.pinVcpu(0,1) but still my vcpu affinity is for all the pcpus. The

Hi all, This is the second take of a patch that I submitted some time ago for allowing specifying vcpu pinning taking NUMA nodes into account. IOW, something like this: * "nodes:0-3": all pCPUs of nodes 0,1,2,3;  * "nodes:0-3,^node:2": all pCPUS of nodes 0,1,3;  * "1,nodes:1-2,^6": pCPU 1 plus all pCPUs of nodes 1,2    but not pCPU 6; v1 was a single patch, this is

Hi. Can anyone confirm if vcpupin works correctly with kvm? If set I pin a vcpu it shows up correctly via vcpuinfo, but querying via taskset shows the cpu is not pinned. Thanks, -Geoff -- ---- Geoff Galitz, ggalitz at shutterstock.com WebOps Engineer, Europe Shutterstock Images http://wwww.shutterstock.com/

hi list, I have a winXP program that uses the PC parallel port.I have created the links in .wine/dosdevices/ lrwxrwxrwx 1 peeyush peeyush 10 2006-03-03 22:48 com1 -> /dev/ttyS0 lrwxrwxrwx 1 peeyush peeyush 8 2006-03-03 22:48 lpt1 -> /dev/lp0 lrwxrwxrwx 1 peeyush peeyush 1 2006-03-03 22:52 d: -> / lrwxrwxrwx 1 peeyush peeyush 10 2006-03-03 22:52 c: -> ../drive_c Now the

Hello, I've upgraded from 2.3.1 to 2.3.2. I've been used to list all mount points by <xsl:for-each select="source"/> under /icestats. Howver now the /icestats elemets contains only source elemets which have been requested at least once. That means the list (e.g. /stats.xsl under web directory) is empty after server start. I've found out this regresion presents only

Hi,  I am trying to install new libvirt version on Ubuntu 12.04 LTS. Now I downloaded libvirt 1.0.5 from libvirt.org/sources then I issued three commands: ./autogen.sh make make install This installs the libvirt on my system. But there are some issues, I have to run libvirtd explicitly everytime I reboot my system. And whenever I try to run virt-manager from terminal, it says "No D-Bus

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">

Hi, Sorry, I will keep the instructions in mind. I tried ./autogen.sh with --system but there was a version mismatch. I guess someone should write a patch for debian based system.  I tried to install libvirt 1.1.1 with Fedora and when I did make, I got the following error:  Making all in src make[2]: Entering directory `/home/peeyush/Downloads/libvirt-1.1.1/src'   GEN    

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

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

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'

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.

Dear member of libvirt team, I hope the lxc could be dynamically reconfigured, such as the number of vcpu or vcpu pinning. According to http://libvirt.org/hvsupport.html , at present, setvcpus(virDomainSetVcpus) and vcpupin (virDomainGetVcpuPinInfo) are not supported by lxc driver. I wonder if these commands will be supported by libvirt in the future? Best wishes, Cheng Wang

Hi all, I have been trying to set cpu_exclusive flag. Now I can do it using "echo". I want to know is there any other way (an API) to set this flag? Is it possible to set this flag using API? Thanks.   ~Peeyush Gupta

Hello, According to the docs, vcpupin will use either cgroups or sched_setaffinity to pin vcpu threads to cpus. How is this decision made? I observe differences even on different hosts featuring the same version of libvirtd (1.3.1): on one host vcpupin affects cpuset.cpus (cgroup), and on the other it affects vcpu threads affinity (observed through taskset). Thanks, Nikos -------------- next

Hi all, I have been trying to find out cpu topology using libvirt. When I do 'virsh capabilites', I find this inside <topology> tag: <topology>       <cells num='1'>         <cell id='0'>           <memory unit='KiB'>3908488</memory>           <cpus num='4'>             <cpu id='0' socket_id='0'

Hi experts I want to use libvirt doing the migration migration the guest from core 0 to core 2, Is there a way to do this ? any points? Lei -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20131203/1cd982b2/attachment.htm>

On 12/03/2013 12:52 AM, Nicolas Sebrecht wrote: > This is about CPU affinity. You may look at CPU pinning with 'vcpupin' > in the manual of virsh. It is possible to enable vCPU pinning in libvirt > guest XML. > > Don't know if libvirt supports applying CPU affinity at guest runtime Yes, 'virsh vcpupin' can be used to change CPU affinity at runtime. > but

Hi, I have been trying to find out CPU topology using libvirt. I understand that I can find out the number of cores/sockets/ threads etc through getCapabilities() function. What I am wondering is that is there any function that can provide me the exact topology like how many sockets, how many sockets per core and number of threads per core, if applicable or may be info about numa cells.  Is there