From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
To: John <linux.kernel@free.fr>
Cc: Eric Dumazet <dada1@cosmosbay.com>,
linux-net@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: CLOCK_MONOTONIC datagram timestamps by the kernel
Date: Thu, 1 Mar 2007 13:03:26 +0300 [thread overview]
Message-ID: <20070301100326.GA30537@2ka.mipt.ru> (raw)
In-Reply-To: <45E5A8AE.3030606@free.fr>
On Wed, Feb 28, 2007 at 05:07:10PM +0100, John (linux.kernel@free.fr) wrote:
> Again, this is irrelevant. We are discussing whether it would make sense
> to support sub-microsecond resolution. If there is one platform that can
> achieve sub-microsecond precision, there is a need for sub-microsecond
> resolution. As long as we are changing the resolution, we might as well
> use something standard like struct timespec.
You can not blindly change skb timestamps to different entities - you
need to change all users (at least in kernel).
Exporting it to userspace must require new socket option and old one ust
be changed accordingly, but there is nothing wrong in having nanosecond
resolution in packet timestamp except that it might not be 100% correct
receiving time.
--
Evgeniy Polyakov
next prev parent reply other threads:[~2007-03-01 10:03 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-28 10:18 CLOCK_MONOTONIC datagram timestamps by the kernel John
2007-02-28 13:37 ` John
2007-02-28 13:55 ` Eric Dumazet
2007-02-28 14:23 ` John
2007-02-28 14:55 ` Eric Dumazet
2007-02-28 16:07 ` John
2007-03-01 10:03 ` Evgeniy Polyakov [this message]
2007-03-01 11:30 ` Eric Dumazet
2007-03-01 15:54 ` Stephen Hemminger
2007-03-01 16:13 ` Eric Dumazet
2007-03-02 14:38 ` [PATCH] NET : convert network timestamps to ktime_t Eric Dumazet
2007-03-02 16:27 ` Stephen Hemminger
2007-03-02 21:02 ` Stephen Hemminger
2007-03-02 22:46 ` Eric Dumazet
2007-03-05 0:19 ` David Miller
2007-03-05 6:56 ` Eric Dumazet
2007-03-05 7:40 ` Eric Dumazet
2007-03-05 8:00 ` David Miller
2007-03-05 8:21 ` Eric Dumazet
2007-03-05 8:49 ` David Miller
2007-03-08 14:17 ` [PATCH] NET : Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution Eric Dumazet
2007-03-08 16:28 ` Patrick McHardy
2007-03-08 16:42 ` Eric Dumazet
2007-03-08 16:45 ` Patrick McHardy
2007-03-09 4:39 ` David Miller
2007-03-09 18:39 ` [PATCH] NET : Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support Eric Dumazet
2007-03-09 22:17 ` David Miller
2007-03-01 18:53 ` CLOCK_MONOTONIC datagram timestamps by the kernel Stephen Hemminger
2007-03-01 23:14 ` Eric Dumazet
2007-03-01 23:34 ` Stephen Hemminger
2007-03-02 0:56 ` Eric Dumazet
2007-03-02 9:26 ` John
2007-03-02 10:11 ` Eric Dumazet
2007-02-28 18:22 ` Stephen Hemminger
-- strict thread matches above, loose matches on Subject: below --
2007-02-25 21:29 John
2007-02-26 10:26 ` John
2007-02-26 12:20 ` Andi Kleen
2007-02-26 14:17 ` John
2007-02-28 11:23 ` John
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