From: Richard Cochran <richardcochran@gmail.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Paolo Bonzini <pbonzini@redhat.com>,
Radim Krcmar <rkrcmar@redhat.com>,
Miroslav Lichvar <mlichvar@redhat.com>
Subject: Re: [patch 4/4] PTP: add kvm PTP driver
Date: Tue, 24 Jan 2017 19:11:20 +0100 [thread overview]
Message-ID: <20170124181120.GA2517@localhost.localdomain> (raw)
In-Reply-To: <20170124171020.537965390@redhat.com>
On Tue, Jan 24, 2017 at 03:09:42PM -0200, Marcelo Tosatti wrote:
> Add a driver with gettime method returning hosts realtime clock.
> This allows Chrony to synchronize host and guest clocks with
> high precision (see results below).
>
> chronyc> sources
> MS Name/IP address Stratum Poll Reach LastRx Last sample
> ===============================================================================
> #* PHC0 0 3 377 4 +162ns[ -683ns] +/- 11ns
>
> To configure Chronyd to use PHC refclock, add the
> following line to its configuration file:
>
> refclock PHC /dev/ptpX poll 3 dpoll -2 offset 0
>
> Where /dev/ptpX is the kvmclock PTP clock.
>
> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
next prev parent reply other threads:[~2017-01-24 18:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-24 17:09 [patch 0/4] KVM virtual PTP driver (v5) Marcelo Tosatti
2017-01-24 17:09 ` [patch 1/4] KVM: x86: provide realtime host clock via vsyscall notifiers Marcelo Tosatti
2017-01-25 12:30 ` Paolo Bonzini
2017-01-24 17:09 ` [patch 2/4] KVM: x86: add KVM_HC_CLOCK_OFFSET hypercall Marcelo Tosatti
2017-01-25 12:30 ` Paolo Bonzini
2017-01-25 12:55 ` Marcelo Tosatti
2017-01-25 12:59 ` Paolo Bonzini
2017-01-25 13:06 ` Marcelo Tosatti
2017-01-25 13:15 ` Paolo Bonzini
2017-01-24 17:09 ` [patch 3/4] kvmclock: export kvmclock clocksource pointer Marcelo Tosatti
2017-01-24 17:09 ` [patch 4/4] PTP: add kvm PTP driver Marcelo Tosatti
2017-01-24 18:11 ` Richard Cochran [this message]
2017-01-25 12:56 ` Paolo Bonzini
2017-01-25 13:03 ` Marcelo Tosatti
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170124181120.GA2517@localhost.localdomain \
--to=richardcochran@gmail.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mlichvar@redhat.com \
--cc=mtosatti@redhat.com \
--cc=pbonzini@redhat.com \
--cc=rkrcmar@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox