lkml.org 
[lkml]   [2015]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 1/4] Add correlated clocksource deriving system time from an auxiliary clocksource
On Fri, Sep 04, 2015 at 10:11:22AM +0200, Richard Cochran wrote:
> On Thu, Sep 03, 2015 at 11:20:37PM +0000, Hall, Christopher S wrote:
> > In addition to the network interface, ART will be used in the audio interface as well.
> > We need to support the case where an audio co-processor will control the audio device.
> > In this case, the get_ts() function supplied by the audio driver will be very slow
> > (several milliseconds) and the result will be out of date by some fraction of that
> > amount.
>
> Why does it take milliseconds to read one audio time stamp?

So what I suspect, but please correct me if I'm wrong Chris, is that a
DSP will buffer and process audio signals, and only later wake up the
main CPU.

So by the time the CPU is made aware of the data, it's 'old'.



\
 
 \ /
  Last update: 2015-09-04 16:41    [W:0.078 / U:0.576 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site