[Beowulf] precise synchronization of system clocks
Lux, James P
james.p.lux at jpl.nasa.gov
Mon Sep 29 17:20:46 PDT 2008
James Lux, P.E.
Task Manager, SOMD Software Defined Radios
Flight Communications Systems Section
Jet Propulsion Laboratory
4800 Oak Grove Drive, Mail Stop 161-213
Pasadena, CA, 91109
> -----Original Message-----
> From: beowulf-bounces at beowulf.org
> [mailto:beowulf-bounces at beowulf.org] On Behalf Of Lawrence Stewart
> Sent: Monday, September 29, 2008 4:00 PM
> To: Lombard, David N
> Cc: Beowulf Mailing List; Lawrence Stewart
> Subject: Re: [Beowulf] precise synchronization of system clocks
> > The IEEE-1588 "Precision Time Protocol" can provide such levels of
> > global clock synchronization.
> That's the one I was trying to remember, but I didn't compose a good
> query and couldn't find it.
> IIRC the NIC timestamps arriving packets right off the wire?
> an on-chip logic analyzer
> gadget that can do that, but the synchronization problem we have is
> only to find one-time
> offsets, so we didn't need to go this deep.
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