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when i send a reboot command to libvirtd to reboot a domain, it does not receive and print the following warn: 2013-04-10 06:01:39.080+0000: 2908: warning : qemuDomainObjTaint:1311 : Domain id=56 name='69751ca7-3198-4f3c-8265-cb8cb70ad750' uuid=69751ca7-3198-4f3c-8265-cb8cb70ad750 is tainted: high-privileges thanks a lot. > From: libvirt-users-request@xxxxxxxxxx > Subject: libvirt-users Digest, Vol 40, Issue 24 > To: libvirt-users@xxxxxxxxxx > Date: Wed, 10 Apr 2013 12:00:18 -0400 > > Send libvirt-users mailing list submissions to > libvirt-users@xxxxxxxxxx > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.redhat.com/mailman/listinfo/libvirt-users > or, via email, send a message with subject or body 'help' to > libvirt-users-request@xxxxxxxxxx > > You can reach the person managing the list at > libvirt-users-owner@xxxxxxxxxx > When replying, please edit your Subject line so it is more specific > than "Re: Contents of libvirt-users digest..." > > > Today's Topics: > > 1. performance tradeoffs/penalty (lejeczek) > 2. Re: performance tradeoffs/penalty (Felicitus) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 10 Apr 2013 13:02:19 +0100 > From: lejeczek <peljasz@xxxxxxxxxxx> > To: libvirt-users@xxxxxxxxxx > Subject: [libvirt-users] performance tradeoffs/penalty > Message-ID: <516554CB.2000703@xxxxxxxxxxx> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > hi everybody > > a newbie here, hoping some experienced users/expert can > honestly answer this one question, > and I think I realize all other advantages libvirtoffer but > simply performance, > > does libvirt make a user pay penalty, even if only a small > amount, for using it when compared to raw qemu-kvm command line? > if it does where the overhead goes? quest or host, or maybe > both? > lastly > if overall performance is slower then how small it is > comparing to all the advantages it offers? > > many thanks > and apologies if this subject was answered already in the past > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <https://www.redhat.com/archives/libvirt-users/attachments/20130410/6183c314/attachment.html> > > ------------------------------ > > Message: 2 > Date: Wed, 10 Apr 2013 14:45:02 +0200 > From: Felicitus <felicitus@xxxxxxxxxxxxx> > To: libvirt-users@xxxxxxxxxx > Subject: Re: [libvirt-users] performance tradeoffs/penalty > Message-ID: <51655ECE.20503@xxxxxxxxxxxxx> > Content-Type: text/plain; charset=ISO-8859-1 > > > does libvirt make a user pay penalty, even if only a small amount, for > > using it when compared to raw qemu-kvm command line? > > Not that I know of, except that the libvirt daemon uses a few additional > CPU cycles. Technically yes, in the spirit of the question no. Have a > look at your process tree; you'll see command lines in the same way as > you'd expect them to be when you start machines manually. > > > if it does where the overhead goes? quest or host, or maybe both? > > No additional CPU cycles for the guest, a few additional CPU cycles for > the host to get status information and expose it via the daemon. > > > if overall performance is slower then how small it is comparing to all > > the advantages it offers? > > It is completely negligible. > > Felicitus > > > > ------------------------------ > > _______________________________________________ > libvirt-users mailing list > libvirt-users@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/libvirt-users > > End of libvirt-users Digest, Vol 40, Issue 24 > ********************************************* |
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