[Lazarus] EPIKTIMER etc
tony.whyman at mccallumwhyman.com
Mon Jun 8 13:39:46 CEST 2015
So, do we conclude that Microsoft's "Embrace, extend, and extinguish"
strategy now applies to Time itself?
On 08/06/15 12:34, Michael Schnell wrote:
> Just to let you know....
> In search of a problem completely unrelated to fpc and Lazarus I found
> out that the reason of the severe timing inaccuracy making this
> application being absolutely unusable for the desired task, has been
> Microsoft "Active Directory".
> After I installed Automachron, syncing the PC with an "official" NTP
> Server, the problem vanished. (But the IT department told me that this
> PC will see severe issues, e.g. Active Directory preventing user login. )
> I seem to remember, that many FPC built Projects either directly use
> the PC clock as a source for timing or use EPIKTIMER that in some
> incarnations use a CPU based hardware timer and in other incarnation,
> use the PC clock as well.
> Now I found that with "Active Directory" in my installation the PC
> clock erratically fluctuates at rates of at least some 40 seconds per
> hour and at least for a total amount of 40 Seconds.
> So it is a lot worse than the uninfluenced clock of even a really
> cheap PC and unusable for many timing tasks.
> Lazarus mailing list
> Lazarus at lists.lazarus.freepascal.org
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