[coyotos-dev] Sleep, wakeup, and persistence

[Valerio Bellizzomi]

On 15/09/2007, at 3.38, Sam Mason wrote:

>On Sat, Sep 15, 2007 at 04:06:17AM +0200, Valerio Bellizzomi wrote:
>> With the clock at 50% it should require (drift * 2) plus some small
time
>> to manipulate the clock.
>
>I'm not sure I understand this completely, but I don't think it matters.
>
>> Probably it is affordable to slow down the clock permanently to reduce
>the
>> drift. There might also be a clock value that keeps the wall time
>> approximately accurate, in that case one can synchronize less
frequently.
>> Learning the right value should not be that difficult with NTP.
>> But I don't know if it is useful enought to implement.
>
>The NTP daemon will correct up to 500 PPM (parts per million) of error
>in your clock by changing the rate at which time is incremented.  As the
>daemon confidence increases in your clock it'll slow down the polling
>frequency to (normally) about once every 20 minutes.  You just have to
>leave it running long enough and it'll figure everything out on its own.

You mean polling a server? once every 20 minutes seems a high rate to me.


>
>
>  Sam
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