From: Richard Cochran <richardcochran@gmail.com>
To: Vladimir Oltean <olteanv@gmail.com>
Cc: David Miller <davem@davemloft.net>,
Florian Fainelli <f.fainelli@gmail.com>,
Vivien Didelot <vivien.didelot@gmail.com>,
Andrew Lunn <andrew@lunn.ch>,
John Stultz <john.stultz@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Stephen Boyd <sboyd@kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH v3 net-next 00/17] PTP support for the SJA1105 DSA driver
Date: Thu, 6 Jun 2019 20:32:43 -0700 [thread overview]
Message-ID: <20190607033242.expuqccmzhxdkwzq@localhost> (raw)
In-Reply-To: <CA+h21hosUmUu98QdzKTJPUd2PEwa+sUg1SNY1ti95kD6kOqE6A@mail.gmail.com>
On Thu, Jun 06, 2019 at 04:40:19PM +0300, Vladimir Oltean wrote:
> Plain and simply because it doesn't work very well.
> Even phc2sys from the system clock to the hardware (no timestamps
> involved) has trouble staying put (under 1000 ns offset).
> And using the hardware-corrected timestamps triggers a lot of clockchecks.
It sounds like a bug in reading or adjusting the HW clock. Is the HW
clock stable when you don't adjust its frequency?
Thanks,
Richard
next prev parent reply other threads:[~2019-06-07 3:32 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-04 17:07 [PATCH v3 net-next 00/17] PTP support for the SJA1105 DSA driver Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 01/17] net: dsa: Keep a pointer to the skb clone for TX timestamping Vladimir Oltean
2019-06-04 20:31 ` Florian Fainelli
2019-06-04 17:07 ` [PATCH v3 net-next 02/17] net: dsa: Add teardown callback for drivers Vladimir Oltean
2019-06-04 18:15 ` Andrew Lunn
2019-06-04 20:32 ` Florian Fainelli
2019-06-04 17:07 ` [PATCH v3 net-next 03/17] net: dsa: tag_8021q: Create helper function for removing VLAN header Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 04/17] net: dsa: sja1105: Move sja1105_change_tpid into sja1105_vlan_filtering Vladimir Oltean
2019-06-04 20:58 ` Florian Fainelli
2019-06-04 17:07 ` [PATCH v3 net-next 05/17] net: dsa: sja1105: Reverse TPID and TPID2 Vladimir Oltean
2019-06-04 20:33 ` Florian Fainelli
2019-06-04 17:07 ` [PATCH v3 net-next 06/17] net: dsa: sja1105: Limit use of incl_srcpt to bridge+vlan mode Vladimir Oltean
2019-06-04 20:35 ` Florian Fainelli
2019-06-04 17:07 ` [PATCH v3 net-next 07/17] net: dsa: sja1105: Add support for the PTP clock Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 08/17] net: dsa: sja1105: Move sja1105_is_link_local to include/linux Vladimir Oltean
2019-06-04 20:35 ` Florian Fainelli
2019-06-04 17:07 ` [PATCH v3 net-next 09/17] net: dsa: sja1105: Add logic for TX timestamping Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 10/17] net: dsa: sja1105: Build a minimal understanding of meta frames Vladimir Oltean
2019-06-04 21:00 ` Florian Fainelli
2019-06-04 17:07 ` [PATCH v3 net-next 11/17] net: dsa: sja1105: Add support for the AVB Parameters Table Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 12/17] net: dsa: sja1105: Make sja1105_is_link_local not match meta frames Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 13/17] net: dsa: sja1105: Receive and decode " Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 14/17] net: dsa: sja1105: Add a global sja1105_tagger_data structure Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 15/17] net: dsa: sja1105: Increase priority of CPU-trapped frames Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 16/17] net: dsa: sja1105: Add a state machine for RX timestamping Vladimir Oltean
2019-06-04 17:07 ` [PATCH v3 net-next 17/17] net: dsa: sja1105: Expose PTP timestamping ioctls to userspace Vladimir Oltean
2019-06-05 3:22 ` [PATCH v3 net-next 00/17] PTP support for the SJA1105 DSA driver David Miller
2019-06-05 9:13 ` Vladimir Oltean
2019-06-05 11:33 ` Vladimir Oltean
2019-06-05 17:45 ` Richard Cochran
2019-06-05 17:50 ` Vladimir Oltean
2019-06-05 17:52 ` Vladimir Oltean
2019-06-05 18:08 ` Vladimir Oltean
2019-06-06 3:11 ` Richard Cochran
2019-06-06 13:40 ` Vladimir Oltean
2019-06-07 3:32 ` Richard Cochran [this message]
2019-06-07 9:43 ` Vladimir Oltean
2019-06-05 18:44 ` David Miller
2019-06-07 19:15 ` David Miller
2019-06-07 19:38 ` Vladimir Oltean
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