From: Richard Cochran <richardcochran@gmail.com>
To: "Mintz, Yuval" <Yuval.Mintz@cavium.com>
Cc: "davem@davemloft.net" <davem@davemloft.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"Kalluru, Sudarsana" <Sudarsana.Kalluru@cavium.com>
Subject: Re: [PATCH net-next v2 1/2] qed: Add infrastructure for PTP support.
Date: Mon, 30 Jan 2017 14:26:19 +0100 [thread overview]
Message-ID: <20170130132619.GA4854@localhost.localdomain> (raw)
In-Reply-To: <BL2PR07MB23063CA6DC624BDC4ABCCC268D480@BL2PR07MB2306.namprd07.prod.outlook.com>
On Sun, Jan 29, 2017 at 09:36:11PM +0000, Mintz, Yuval wrote:
> I might have gotten it all wrong, but I was under the assumption that time-
> stamped packets are periodic, and that the interval between two isn't
> going to be so small.
That is an incorrect assumption. Consider the Delay_Req packets
arriving on a port in the MASTER state.
> Is so, how does having a couple of additional instructions in between
> jeopardizes the next time stamp?
It is not just about the few instructions, but there is also
preemption possible.
Thanks,
Richard
next prev parent reply other threads:[~2017-01-30 13:54 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-29 7:28 [PATCH net-next v2 0/2] qed*: Add support for PTP Sudarsana Kalluru
2017-01-29 7:28 ` [PATCH net-next v2 1/2] qed: Add infrastructure for PTP support Sudarsana Kalluru
2017-01-29 8:32 ` kbuild test robot
2017-01-29 15:28 ` Richard Cochran
2017-01-29 15:31 ` Richard Cochran
2017-01-29 17:26 ` Mintz, Yuval
2017-01-29 20:51 ` Richard Cochran
2017-01-29 21:36 ` Mintz, Yuval
2017-01-30 13:26 ` Richard Cochran [this message]
2017-01-30 18:00 ` Mintz, Yuval
2017-01-29 7:28 ` [PATCH net-next v2 2/2] qede: Add driver support for PTP Sudarsana Kalluru
2017-01-29 15:35 ` Richard Cochran
2017-01-29 17:30 ` Mintz, Yuval
2017-01-29 21:02 ` Richard Cochran
2017-01-29 21:40 ` Mintz, Yuval
2017-01-30 14:34 ` David Laight
2017-01-30 17:55 ` Mintz, Yuval
2017-01-31 10:03 ` David Laight
2017-01-31 14:31 ` Mintz, Yuval
2017-01-31 14:53 ` Richard Cochran
2017-01-31 15:08 ` Mintz, Yuval
2017-01-31 17:43 ` Richard Cochran
2017-01-29 15:09 ` [PATCH net-next v2 0/2] qed*: Add " Richard Cochran
2017-01-29 17:23 ` Mintz, Yuval
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