From: Marcelo Tosatti <mtosatti@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org,
Luiz Capitulino <lcapitulino@redhat.com>
Subject: Re: [Qemu-devel] [QEMU patch 2/2] kvm: allow configuration of tsc deadline timer advancement
Date: Wed, 10 Dec 2014 15:27:12 -0200 [thread overview]
Message-ID: <20141210172712.GA20568@amt.cnet> (raw)
In-Reply-To: <54887E3F.4030904@redhat.com>
On Wed, Dec 10, 2014 at 06:09:19PM +0100, Paolo Bonzini wrote:
>
>
> On 10/12/2014 18:04, Marcelo Tosatti wrote:
> >> Please add an object property to the x86 CPU object. It can then be
> >> configured with "-global" on the command line.
> >
> > Don't want to allow individual values for different CPUs.
> > It is a per-VM property.
>
> Why? It can cause busy waiting, it would make sense to make it stricter
> for realtime CPUs and leave 0 for non-realtime CPUs.
>
> Paolo
HW timer behaviour should be consistent across CPUs, IMO.
next prev parent reply other threads:[~2014-12-10 17:27 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-10 16:23 [Qemu-devel] [QEMU patch 0/2] QEMU lapic tsc deadline advancement Marcelo Tosatti
2014-12-10 16:23 ` [Qemu-devel] [QEMU patch 1/2] kvm: sync kernel headers Marcelo Tosatti
2014-12-10 16:23 ` [Qemu-devel] [QEMU patch 2/2] kvm: allow configuration of tsc deadline timer advancement Marcelo Tosatti
2014-12-10 17:01 ` Paolo Bonzini
2014-12-10 17:04 ` Marcelo Tosatti
2014-12-10 17:09 ` Paolo Bonzini
2014-12-10 17:27 ` Marcelo Tosatti [this message]
2014-12-10 17:29 ` Paolo Bonzini
2014-12-10 17:35 ` Marcelo Tosatti
2014-12-10 17:55 ` Paolo Bonzini
2014-12-10 18:39 ` Radim Krčmář
2014-12-10 18:59 ` Paolo Bonzini
2014-12-10 17:06 ` Eric Blake
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