From: Peter Zijlstra <peterz@infradead•org>
To: Richard Cochran <richardcochran@gmail•com>
Cc: Thomas Gleixner <tglx@linutronix•de>,
"Hall, Christopher S" <christopher.s.hall@intel•com>,
"Kirsher, Jeffrey T" <jeffrey.t.kirsher@intel•com>,
"hpa@zytor•com" <hpa@zytor•com>,
"mingo@redhat•com" <mingo@redhat•com>,
"john.stultz@linaro•org" <john.stultz@linaro•org>,
"x86@kernel•org" <x86@kernel•org>,
"linux-kernel@vger•kernel.org" <linux-kernel@vger•kernel.org>,
"netdev@vger•kernel.org" <netdev@vger•kernel.org>,
"intel-wired-lan@lists•osuosl.org"
<intel-wired-lan@lists•osuosl.org>
Subject: Re: [PATCH v3 1/4] Add correlated clocksource deriving system time from an auxiliary clocksource
Date: Fri, 4 Sep 2015 17:41:33 +0200 [thread overview]
Message-ID: <20150904154133.GI18489@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20150904151743.GB16862@localhost.localdomain>
On Fri, Sep 04, 2015 at 05:17:43PM +0200, Richard Cochran wrote:
> On Fri, Sep 04, 2015 at 05:10:21PM +0200, Peter Zijlstra wrote:
> > I think what they're getting at is asking if there's a rate limit to
> > time adjustments, without that, saving the last n transition points will
> > still not cover any given length of history.
>
> As if the ntp code isn't complex enough already - now we're adding
> sample histories and adjustment rating limiting?
>
> And all for some unknown DSP in a mythical sound card??
Hehe, I'm just a 'translator' here. But going by you answer I'm taking
it there isn't in fact a rate-limit to adjustments. Which, even if you
were not opposed to that direction, makes it an unfeasible proposition.
Also, I'm not thinking its too mythical, sound/soc/intel/ is full of
audio DSP stuff, I think a newer version will just gain ART support.
next prev parent reply other threads:[~2015-09-04 15:41 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-21 18:52 [PATCH v3 0/4] Patchset enabling hardware based cross-timestamps for next gen Intel platforms Christopher S. Hall
2015-08-21 18:52 ` [PATCH v3 1/4] Add correlated clocksource deriving system time from an auxiliary clocksource Christopher S. Hall
2015-08-22 20:17 ` Thomas Gleixner
2015-09-03 23:20 ` Hall, Christopher S
2015-09-04 8:11 ` Richard Cochran
2015-09-04 14:28 ` Peter Zijlstra
2015-09-04 21:12 ` Hall, Christopher S
2015-09-04 13:02 ` Thomas Gleixner
2015-09-04 15:10 ` Peter Zijlstra
2015-09-04 15:17 ` Richard Cochran
2015-09-04 15:41 ` Peter Zijlstra [this message]
2015-09-04 16:35 ` Thomas Gleixner
2015-09-04 21:01 ` Hall, Christopher S
2015-09-05 8:46 ` Thomas Gleixner
2015-09-05 10:04 ` Ingo Molnar
2015-09-04 15:32 ` Richard Cochran
2015-09-04 21:50 ` John Stultz
2015-08-21 18:52 ` [PATCH v3 2/4] Added ART correlated clocksource and ART CPU feature Christopher S. Hall
2015-08-22 20:26 ` Thomas Gleixner
2015-08-21 18:52 ` [PATCH v3 3/4] Add support for driver cross-timestamp to PTP_SYS_OFFSET ioctl Christopher S. Hall
2015-08-22 20:33 ` Thomas Gleixner
2015-08-22 21:17 ` Richard Cochran
2015-08-23 8:15 ` Thomas Gleixner
2015-08-23 11:25 ` Richard Cochran
2015-08-24 20:16 ` Hall, Christopher S
2015-08-25 7:31 ` Richard Cochran
2015-08-21 18:52 ` [PATCH v3 4/4] Enabling hardware supported PTP system/device crosstimestamping Christopher S. Hall
2015-08-22 20:46 ` Thomas Gleixner
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