[ntp:questions] best gps receiver for time synchronization

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Mon May 11 15:54:46 UTC 2009


In article <c4OdnQpbdb1STirUnZ2dnUVZ_tHinZ2d at giganews.com>,
 "Richard B. Gilbert" <rgilbert88 at comcast.net> writes:

>ISTR that there have been previous references in this newsgroup. 
>Specifically, EIDE disk drivers can mask or disable interrupts  for a 
>period long enough  to cause a "lost tick".  I believe the group is 
>archived somewhere. . . .

Old old old versions of Red Hat shipped with DMA disabled
on disks.  With enough disk activity you could miss ticks.
It was trivial to provoke.


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