From: Richard Cochran <richardcochran@gmail.com>
To: "Christopher S. Hall" <christopher.s.hall@intel.com>
Cc: tglx@linutronix.de, mingo@redhat.com, john.stultz@linaro.org,
hpa@zytor.com, jeffrey.t.kirsher@intel.com, x86@kernel.org,
linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
netdev@vger.kernel.org, kevin.b.stanton@intel.com
Subject: Re: [PATCH v6 8/9] Add PTP_SYS_OFFSET_PRECISE for driver crosstimestamping
Date: Wed, 13 Jan 2016 22:31:56 +0100 [thread overview]
Message-ID: <20160113213156.GB20252@localhost.localdomain> (raw)
In-Reply-To: <1452687149-11281-9-git-send-email-christopher.s.hall@intel.com>
On Wed, Jan 13, 2016 at 04:12:28AM -0800, Christopher S. Hall wrote:
> Currently, network /system cross-timestamping is performed in the
> PTP_SYS_OFFSET ioctl. The PTP clock driver reads gettimeofday() and
> the gettime64() callback provided by the driver. The cross-timestamp
> is best effort where the latency between the capture of system time
> (getnstimeofday()) and the device time (driver callback) may be
> significant.
Looks good to me.
Acked-by: Richard Cochran <richardcochran@gmail.com>
next prev parent reply other threads:[~2016-01-13 21:31 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-13 12:12 [PATCH v6 0/9] Patchset enabling hardware based cross-timestamps for next gen Intel platforms Christopher S. Hall
2016-01-13 12:12 ` [PATCH v6 1/9] Add cycles to nanoseconds translation Christopher S. Hall
2016-01-13 12:12 ` [PATCH v6 2/9] Add driver cross timestamp interface for higher precision time synchronization Christopher S. Hall
2016-01-13 21:30 ` Richard Cochran
2016-01-13 12:12 ` [PATCH v6 3/9] Add correlated clocksource relating aliased auxiliary and system clocks Christopher S. Hall
2016-01-15 0:24 ` John Stultz
2016-01-15 10:29 ` Thomas Gleixner
2016-01-13 12:12 ` [PATCH v6 4/9] Always Running Timer (ART) correlated clocksource Christopher S. Hall
2016-01-14 22:00 ` John Stultz
2016-01-13 12:12 ` [PATCH v6 5/9] Add timekeeping snapshot code capturing system time and counter Christopher S. Hall
2016-01-13 12:12 ` [PATCH v6 6/9] Add history to cross timestamp interface supporting slower devices Christopher S. Hall
2016-01-13 12:12 ` [PATCH v6 7/9] Remove duplicated code in ktime_get_raw_and_real() Christopher S. Hall
2016-01-13 12:12 ` [PATCH v6 8/9] Add PTP_SYS_OFFSET_PRECISE for driver crosstimestamping Christopher S. Hall
2016-01-13 21:31 ` Richard Cochran [this message]
2016-01-13 12:12 ` [PATCH v6 9/9] Adds hardware supported cross timestamp Christopher S. Hall
2016-01-15 0:49 ` [PATCH v6 0/9] Patchset enabling hardware based cross-timestamps for next gen Intel platforms John Stultz
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