netdev - Re: [uclinux-dist-devel] [PATCH RFC net-next 2/4] bfin_mac: replace sys time stamps with raw ones instead.

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Message-ID: <20121031083652.GC2327@netboy.at.omicron.at>
Date:	Wed, 31 Oct 2012 09:36:53 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	Bob Liu <lliubbo@...il.com>
Cc:	netdev@...r.kernel.org, Miroslav Lichvar <mlichvar@...hat.com>,
	John Ronciak <john.ronciak@...el.com>,
	John Stultz <john.stultz@...aro.org>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	device-drivers-devel@...ckfin.uclinux.org,
	Jacob Keller <jacob.e.keller@...el.com>,
	uclinux-dist-devel@...ckfin.uclinux.org,
	Patrick Ohly <patrick.ohly@...el.com>,
	David Miller <davem@...emloft.net>
Subject: Re: [uclinux-dist-devel] [PATCH RFC net-next 2/4] bfin_mac:
 replace sys time stamps with raw ones instead.

On Wed, Oct 31, 2012 at 02:29:23PM +0800, Bob Liu wrote:

> Any guide how to use ptp4l to sync system time between two machines
> over ethernet?

You can run ptp4l on two machines like this

  ptp4l -i eth0 -q -v     # master
  ptp4l -i eth0 -q -v -s  # slave

and you should see the "master offset" on the slave converge within
about 30 seconds or so.

Thanks,
Richard


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