From: Richard Cochran <richardcochran@gmail.com>
To: Miroslav Lichvar <mlichvar@redhat.com>
Cc: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
Jacob Keller <jacob.e.keller@intel.com>
Subject: Re: [RFC PATCH 0/4] More accurate PHC<->system clock synchronization
Date: Tue, 30 Oct 2018 19:25:55 -0700 [thread overview]
Message-ID: <20181031022555.ghpm7654n5jp43uq@localhost> (raw)
In-Reply-To: <20181026162742.631-1-mlichvar@redhat.com>
On Fri, Oct 26, 2018 at 06:27:38PM +0200, Miroslav Lichvar wrote:
> The other patches add support for the new ioctl to the e1000e, igb,
> and ixgbe driver. Tests with few different NICs in different machines
> (and PCIe slots) show that:
> - with an I219 (e1000e) the measured delay improved from 2500 to 1300 ns
> and the error in the measured offset, when compared to cross
> timestamping, was reduced by a factor of 5
> - with an I210 (igb) the delay improved from 5100 to 1700 ns
> - with an I350 (igb) the delay improved from 2300 to 750 ns
> - with an X550 (ixgbe) the delay improved from 1950 to 650 ns
Nice work! This is a welcome improvement.
Thanks,
Richard
prev parent reply other threads:[~2018-10-31 11:21 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-26 16:27 [RFC PATCH 0/4] More accurate PHC<->system clock synchronization Miroslav Lichvar
2018-10-26 16:27 ` [RFC PATCH 1/4] ptp: add PTP_SYS_OFFSET_EXTENDED ioctl Miroslav Lichvar
2018-10-26 22:16 ` [Intel-wired-lan] " Vinicius Costa Gomes
2018-10-29 12:52 ` Miroslav Lichvar
2018-10-31 2:23 ` Richard Cochran
2018-10-31 3:01 ` Richard Cochran
2018-10-26 16:27 ` [RFC PATCH 2/4] e1000e: add support for extended PHC gettime Miroslav Lichvar
2018-10-26 16:27 ` [RFC PATCH 3/4] igb: " Miroslav Lichvar
2018-10-31 2:29 ` Richard Cochran
2018-10-31 9:39 ` Miroslav Lichvar
2018-10-31 16:56 ` Keller, Jacob E
2018-10-26 16:27 ` [RFC PATCH 4/4] ixgbe: " Miroslav Lichvar
2018-10-26 16:54 ` Keller, Jacob E
2018-10-29 13:31 ` Miroslav Lichvar
2018-10-29 16:02 ` Keller, Jacob E
2018-10-31 14:40 ` Richard Cochran
2018-10-31 14:49 ` Miroslav Lichvar
2018-10-31 21:16 ` Richard Cochran
2018-10-31 22:08 ` Keller, Jacob E
2018-10-31 16:55 ` Keller, Jacob E
2018-10-26 16:40 ` [RFC PATCH 0/4] More accurate PHC<->system clock synchronization Keller, Jacob E
2018-10-26 16:51 ` Keller, Jacob E
2018-10-31 2:25 ` Richard Cochran [this message]
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