Ok. I'll do some tests... Thanks for the input. > -----Oorspronkelijk bericht----- > Van: Martin Kletzander [mailto:mkletzan@xxxxxxxxxx] > Verzonden: donderdag 18 februari 2016 10:10 > Aan: Dominique Ramaekers > CC: libvirt-ML > Onderwerp: Re: Amount CPU's > > On Wed, Feb 17, 2016 at 07:14:33PM +0000, Dominique Ramaekers wrote: > >Quick question. > > > >In my host, I've got two processors with each 6 cores and each core has > >two threads. > > > >I use iometer to do some testings on hard drive performance. > > > >I get the idea that using more cores give me better results in iometer. > >(if it will improve the speed of my guest is an other > >question...) > > > >For a Windows 2012 R2 server guest, can I just give the guest 24 cores? > >Just to make shure the os has all the possibilities to run as quickly > >as possible? > > > > I don't know about Windows, especially not about 2012 R2, whatever that is =) > But I remember that with some version, you had to supply it as separate > sockets (e.g. <topology sockets='24' cores='1' threads='1'/>), but I'm not sure > what version was that. > > Anyway, you should be able to provide all the CPUs to the guest, however bear > in mind that the host will need some processing power as well, so the best > practice is to keep some CPU power for the host. If you need as much power as > possible, make sure you use all the tuning (pinning, > backing) that's available for you [1] and benchmark the performance. > > Martin > > [1] https://libvirt.org/formatdomain.html _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
