On Tue, Sep 30, 2008 at 12:01:57PM -0700, Donald Becker wrote: > On Tue, 30 Sep 2008, Lawrence Stewart wrote: > > > On Sep 30, 2008, at 12:07 PM, Lux, James P wrote: > > > On 9/30/08 8:37 AM, "Robert G. Brown" <[EMAIL PROTECTED]> wrote: > > > The grottiest grungy GPS receiver can probably do 100ns on its 1pps > > > tick, > > > and most are in the 20ns range. There ARE receivers that have > > > systematic > > > 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... > ... > > Meanwhile, I'll try to find out where I can plug a serial cable into a > modern server...
Ah, come on ;) A serial-USB dongle will do just fine, as will a USB-based GPS receiver... -- David N. Lombard, Intel, Irvine, CA I do not speak for Intel Corporation; all comments are strictly my own. _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
