From: Ingo Molnar <mingo@elte.hu>
To: Patrick Ohly <patrick.ohly@intel.com>,
Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
David Miller <davem@davemloft.net>,
linux-api@vger.kernel.org
Subject: Re: [PATCH NET-NEXT 11/12] time sync: generic infrastructure to map between time stamps generated by a time counter and system time
Date: Wed, 21 Jan 2009 11:33:30 +0100 [thread overview]
Message-ID: <20090121103330.GA25531@elte.hu> (raw)
In-Reply-To: <1232532612-10382-11-git-send-email-patrick.ohly@intel.com>
* Patrick Ohly <patrick.ohly@intel.com> wrote:
> Currently only mapping from time counter to system time is implemented.
> The interface could have been made more versatile by not depending on a time counter,
> but this wasn't done to avoid writing glue code elsewhere.
>
> The method implemented here is the one used and analyzed under the name
> "assisted PTP" in the LCI PTP paper:
> http://www.linuxclustersinstitute.org/conferences/archive/2008/PDF/Ohly_92221.pdf
> ---
> include/linux/clocksync.h | 85 +++++++++++++++++++
> kernel/time/Makefile | 2 +-
> kernel/time/clocksync.c | 196 +++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 282 insertions(+), 1 deletions(-)
> create mode 100644 include/linux/clocksync.h
> create mode 100644 kernel/time/clocksync.c
hm, these bits have less than casual impact - i think they need to go via
the timer tree.
Ingo
next prev parent reply other threads:[~2009-01-21 10:33 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-15 14:54 hardware time stamping with optional structs in data area Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 01/12] net: new user space API for time stamping of incoming and outgoing packets Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 02/12] net: infrastructure for hardware time stamping Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 03/12] net: socket infrastructure for SO_TIMESTAMPING Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 04/12] sockets: allow allocating skb with optional structures Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 05/12] ip: support for TX timestamps on UDP and RAW sockets Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 06/12] debug: NULL pointer check in ip_output Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 07/12] net: pass new SIOCSHWTSTAMP through to device drivers Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 08/12] igb: stub support for SIOCSHWTSTAMP Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 09/12] clocksource: allow usage independent of timekeeping.c Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 10/12] igb: access to NIC time Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 11/12] time sync: generic infrastructure to map between time stamps generated by a time counter and system time Patrick Ohly
2008-12-15 14:54 ` [RFC PATCH 12/12] igb: use clocksync to implement hardware time stamping Patrick Ohly
2008-12-15 16:26 ` [RFC PATCH 09/12] clocksource: allow usage independent of timekeeping.c John Stultz
2008-12-15 16:45 ` Patrick Ohly
2009-02-04 14:29 ` Daniel Walker
2009-02-04 15:00 ` Patrick Ohly
2008-12-15 21:53 ` [RFC PATCH 02/12] net: infrastructure for hardware time stamping Herbert Xu
2008-12-16 7:56 ` Patrick Ohly
2009-01-16 10:36 ` hardware time stamping with optional structs in data area Patrick Ohly
2009-01-16 19:00 ` David Miller
2009-01-21 10:07 ` Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 01/12] net: new user space API for time stamping of incoming and outgoing packets Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 02/12] net: infrastructure for hardware time stamping Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 03/12] net: socket infrastructure for SO_TIMESTAMPING Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 04/12] sockets: allow allocating skb with optional structures Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 05/12] ip: support for TX timestamps on UDP and RAW sockets Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 06/12] debug: NULL pointer check in ip_output Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 07/12] net: pass new SIOCSHWTSTAMP through to device drivers Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 08/12] igb: stub support for SIOCSHWTSTAMP Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 09/12] clocksource: allow usage independent of timekeeping.c Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 10/12] igb: access to NIC time Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 11/12] time sync: generic infrastructure to map between time stamps generated by a time counter and system time Patrick Ohly
2009-01-21 10:10 ` [PATCH NET-NEXT 12/12] igb: use clocksync to implement hardware time stamping Patrick Ohly
2009-01-21 10:33 ` Ingo Molnar [this message]
2009-01-21 14:42 ` [PATCH NET-NEXT 11/12] time sync: generic infrastructure to map between time stamps generated by a time counter and system time Patrick Ohly
2009-01-26 5:04 ` hardware time stamping with optional structs in data area David Miller
2009-01-26 20:39 ` Patrick Ohly
2009-01-27 1:22 ` David Miller
2009-01-27 15:23 ` Patrick Ohly
2009-01-28 9:08 ` Herbert Xu
2009-01-28 9:52 ` Patrick Ohly
2009-01-28 9:54 ` Herbert Xu
2009-02-01 8:14 ` David Miller
2009-02-04 13:02 ` Patrick Ohly
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=20090121103330.GA25531@elte.hu \
--to=mingo@elte.hu \
--cc=davem@davemloft.net \
--cc=linux-api@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=patrick.ohly@intel.com \
--cc=tglx@linutronix.de \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox