[Beowulf] precise synchronization of system clocks
larry.stewart at sicortex.com
Tue Sep 30 10:47:05 PDT 2008
On Sep 30, 2008, at 12:07 PM, Lux, James P wrote:
> On 9/30/08 8:37 AM, "Robert G. Brown" <rgb at phy.duke.edu> wrote:
> The grottiest grungy GPS receiver can probably do 100ns on its 1pps
> and most are in the 20ns range. There ARE receivers that have
> errors (i.e. Some sort of sawtooth in the error) and, of course,
> there are
> countless schemes to compensate in one way or another.
So someone with some grad students and soldering irons should hook up
the 1 pps
output of a GPS to, say, the carrier detect pin on the unused RS232
ports of all their
nodes, and write some software...
More information about the Beowulf