From: Richard Cochran <richardcochran@gmail.com>
To: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Amir Vadai <amirv@mellanox.com>,
Ariel Elior <ariel.elior@qlogic.com>,
Carolyn Wyborny <carolyn.wyborny@intel.com>,
David Miller <davem@davemloft.net>,
Frank Li <Frank.Li@freescale.com>,
John Stultz <john.stultz@linaro.org>,
Matthew Vick <matthew.vick@intel.com>,
Miroslav Lichvar <mlichvar@redhat.com>,
Mugunthan V N <mugunthanvnm@ti.com>,
Or Gerlitz <ogerlitz@mellanox.com>,
Thomas Gleixner <tglx@linutronix.de>,
Tom Lendacky <thomas.lendacky@amd.com>
Subject: Re: [PATCH net-next 08/11] net: ixgbe: convert to timecounter adjtime.
Date: Tue, 23 Dec 2014 22:42:53 +0100 [thread overview]
Message-ID: <20141223214253.GA13937@localhost.localdomain> (raw)
In-Reply-To: <1419368839.2470.32.camel@jtkirshe-mobl>
On Tue, Dec 23, 2014 at 01:07:19PM -0800, Jeff Kirsher wrote:
> Just for sanity sake, I will have Phillip test the changes, but there is
> no need to hold this up from being committed in the mean time.
FYI, here is a test that may show the improved behavior when comparing
before/after.
1. Start ptp4l, let it run long enough to find the frequency offset.
2. Stop ptp4l with ^C.
3. Wait a bit, to let the clock drift away.
4. Restart ptp4l, it will now start with the frequency offset learned
in step 1.
5. Notice the the offsets in states s0 -> s1 -> s2.
There will likely be less offset error with the patches applied.
Thanks,
Richard
next prev parent reply other threads:[~2014-12-23 21:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-21 18:46 [PATCH net-next 00/11] Time Counter fixes and improvements Richard Cochran
2014-12-21 18:46 ` [PATCH net-next 01/11] time: move the timecounter/cyclecounter code into its own file Richard Cochran
2014-12-23 21:03 ` Jeff Kirsher
2014-12-21 18:46 ` [PATCH net-next 02/11] timecounter: provide a helper function to shift the time Richard Cochran
2014-12-21 18:46 ` [PATCH net-next 03/11] net: xgbe: convert to timecounter adjtime Richard Cochran
2014-12-21 18:46 ` [PATCH net-next 04/11] net: bnx2x: " Richard Cochran
2014-12-21 19:01 ` Richard Cochran
2014-12-21 18:47 ` [PATCH net-next 05/11] net: fec: " Richard Cochran
2014-12-21 18:47 ` [PATCH net-next 06/11] net: e1000e: " Richard Cochran
2014-12-23 21:04 ` Jeff Kirsher
2014-12-21 18:47 ` [PATCH net-next 07/11] net: igb: " Richard Cochran
2014-12-23 21:04 ` Jeff Kirsher
2014-12-21 18:47 ` [PATCH net-next 08/11] net: ixgbe: " Richard Cochran
2014-12-23 21:07 ` Jeff Kirsher
2014-12-23 21:42 ` Richard Cochran [this message]
2014-12-21 18:47 ` [PATCH net-next 09/11] net: mlx4: " Richard Cochran
2014-12-21 18:47 ` [PATCH net-next 10/11] net: cpts: " Richard Cochran
2014-12-21 18:47 ` [PATCH net-next 11/11] timecounter: keep track of accumulated fractional nanoseconds Richard Cochran
2014-12-30 23:32 ` [PATCH net-next 00/11] Time Counter fixes and improvements David Miller
2014-12-31 17:42 ` Richard Cochran
2015-01-02 18:37 ` John Stultz
2015-01-02 18:49 ` Richard Cochran
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=20141223214253.GA13937@localhost.localdomain \
--to=richardcochran@gmail.com \
--cc=Frank.Li@freescale.com \
--cc=amirv@mellanox.com \
--cc=ariel.elior@qlogic.com \
--cc=carolyn.wyborny@intel.com \
--cc=davem@davemloft.net \
--cc=jeffrey.t.kirsher@intel.com \
--cc=john.stultz@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=matthew.vick@intel.com \
--cc=mlichvar@redhat.com \
--cc=mugunthanvnm@ti.com \
--cc=netdev@vger.kernel.org \
--cc=ogerlitz@mellanox.com \
--cc=tglx@linutronix.de \
--cc=thomas.lendacky@amd.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.