From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: Richard Weinberger <richard@nod.at>,
penberg@cs.helsinki.fi, kvm@vger.kernel.org, mingo@elte.hu,
asias.hejun@gmail.com
Subject: Re: kvm tools: clock sources for hrtimer
Date: Wed, 9 Nov 2011 20:00:06 +0400 [thread overview]
Message-ID: <20111109160006.GD608@moon> (raw)
In-Reply-To: <1320853793.31056.75.camel@lappy>
On Wed, Nov 09, 2011 at 05:49:53PM +0200, Sasha Levin wrote:
> On Wed, 2011-11-09 at 17:42 +0200, Richard Weinberger wrote:
> > On Wed, 09 Nov 2011 16:49:51 +0200, Sasha Levin
> > <levinsasha928@gmail.com> wrote:
> > > We'll do kvm_clock as well if you compile it in the kernel.
> >
> > CONFIG_HIGH_RES_TIMERS is on both host and guest kernels enabled.
> > BTW: Why adds the kvm tool "notsc" to the guest's kernel command line?
>
> You'll need CONFIG_KVM_CLOCK.
>
> I'm not actually sure how close our implementation is to having tsc
> working so far, Cyrill knows more about that than me.
>
We dropped tsc while were debuggin timer interrupts and apic routing
setup, it might be not needed already. (Still to be fair I'm not sure
does kvm hypervisor has a control bit set for tsc and cause or not vm-exit).
In short -- you could drop this from command line and tell us how it goes ;)
Cyrill
next prev parent reply other threads:[~2011-11-09 16:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-09 14:27 kvm tools: clock sources for hrtimer Richard Weinberger
2011-11-09 14:49 ` Sasha Levin
2011-11-09 15:42 ` Richard Weinberger
2011-11-09 15:49 ` Sasha Levin
2011-11-09 16:00 ` Cyrill Gorcunov [this message]
2011-11-09 16:14 ` Cyrill Gorcunov
2011-11-09 18:56 ` Richard Weinberger
2011-11-09 19:13 ` Pekka Enberg
2011-11-09 19:25 ` Cyrill Gorcunov
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