From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Cochran <richardcochran@gmail.com>
Subject: Re: [patch 4/4] PTP: add kvm PTP driver
Date: Tue, 24 Jan 2017 19:11:20 +0100
Message-ID: <20170124181120.GA2517@localhost.localdomain>
References: <20170124170938.909652059@redhat.com>
 <20170124171020.537965390@redhat.com>
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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>
To: Marcelo Tosatti <mtosatti@redhat.com>
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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>