From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Cochran Subject: Re: [RFC PATCH 0/4] More accurate PHC<->system clock synchronization Date: Tue, 30 Oct 2018 19:25:55 -0700 Message-ID: <20181031022555.ghpm7654n5jp43uq@localhost> References: <20181026162742.631-1-mlichvar@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, Jacob Keller To: Miroslav Lichvar Return-path: Received: from mail-pf1-f194.google.com ([209.85.210.194]:33986 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728671AbeJaLV4 (ORCPT ); Wed, 31 Oct 2018 07:21:56 -0400 Received: by mail-pf1-f194.google.com with SMTP id f78-v6so6831590pfe.1 for ; Tue, 30 Oct 2018 19:25:57 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20181026162742.631-1-mlichvar@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Cochran Date: Tue, 30 Oct 2018 19:25:55 -0700 Subject: [Intel-wired-lan] [RFC PATCH 0/4] More accurate PHC<->system clock synchronization In-Reply-To: <20181026162742.631-1-mlichvar@redhat.com> References: <20181026162742.631-1-mlichvar@redhat.com> Message-ID: <20181031022555.ghpm7654n5jp43uq@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: 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