>I've seen a different frequency correction needed after a kernel is
>installed.
That wouldn't surprise me. The calibration is a combination
of the hardware and the software. Somebody could easily
fix/tweak the software and change some of the details
of the calculations or the timing. The prob
>It would be interesting to know what kernel version those who are having
>trouble with unstable drift in Linux are using. I am using kernel
>2.6.27.7, and it is very stable, varying no more than 5 PPM, even across
>reboots. It should be noted that I rebuilt my kernel with the timer
>frequency s
ryad@gmail.com writes:
>> >As a conclusion I can use them to estimate the skew (as you suggest
>> >"by integrating and so on") over the last period (the period
>> >between the last kernel update and now)
>>
>> I still have absolutely no idea what you are trying to do.
>>
>Here is what I w
> >As a conclusion I can use them to estimate the skew (as you suggest
> >"by integrating and so on") over the last period (the period
> >between the last kernel update and now)
>
> I still have absolutely no idea what you are trying to do.
>
Here is what I want to do (I have reformulated my i
Richard B. Gilbert wrote:
> Terje Mathisen wrote:
>> Running with logging a GPS which isn't used to steer the clock is
>> actually much easier and more accurate.
>>
>> You'll find that you don't need us precision: After a few hours the
>> offsets will probably be into the multiple seconds range,
ryad@gmail.com writes:
>On Jan 20, 2:00=A0am, Unruh wrote:
>> >I want to compare the outputs of an application when this app is fed
>> >with GPS input & when it is fed with HW input
>> >HW input =3D series of ("HW timestamp" + event)
>> >GPS input =3D series of ("GPS timestamps" + event)
>>
"Richard B. Gilbert" writes:
>Terje Mathisen wrote:
>> ryad@gmail.com wrote:
>>> On Jan 19, 10:26 pm, Terje Mathisen
>>> wrote:
ryad@gmail.com wrote:
> Hello everybody,
> I'm trying to track (offline) the drift of my gps clock relative to my
> hw clock (the clock that I
ryad@gmail.com wrote:
> On Jan 20, 2:00 am, Unruh wrote:
>
>>> I want to compare the outputs of an application when this app is fed
>>> with GPS input & when it is fed with HW input
>>> HW input = series of ("HW timestamp" + event)
>>> GPS input = series of ("GPS timestamps" + event)
>> So fe
Terje Mathisen wrote:
> ryad@gmail.com wrote:
>> On Jan 19, 10:26 pm, Terje Mathisen
>> wrote:
>>> ryad@gmail.com wrote:
Hello everybody,
I'm trying to track (offline) the drift of my gps clock relative to my
hw clock (the clock that I would have obtained without GPS).
On Jan 20, 2:00 am, Unruh wrote:
> >I want to compare the outputs of an application when this app is fed
> >with GPS input & when it is fed with HW input
> >HW input = series of ("HW timestamp" + event)
> >GPS input = series of ("GPS timestamps" + event)
>
> So feed it with time stamp inputs and
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