Chuck wrote: > On Monday, August 30, 2010, Hal Murray wrote: > >>> i just noticed this in ntptime. does this mean that the linux kernel is now >>> running in nanosecond resolution, and that it would be acceptable to run on >>> a stratum1 server instead of freebsd? this is from a stratum2 server. when >>> we started with the pool our stratum1 servers needed to be freebsd to use >>> the nano kernel options. >>> >> Linux has been using nanosecond resolution for a long time. >> >> The main problem with using Linux as a stratum1 server was that the kernel >> didn't have PPS support. That was fixed a while ago. I'm not sure when, >> but >> it's in 2.6.34. >> >> >> > > > cool. ill have to mess with that and see how it works out. i much prefer > linux over > freebsd for ease of maintenance. since it has pps support now it will work > with my gps > head. should be interesting.. > It was already possible to use PPS in Linux without fiddling with the kernel, by using gpsd. This solution puts part of the code in userspace so it is slightly less accurate, but on a system that is not heavily loaded (CPU) it works fine. An additional advantage is that the GPS data (position) is still available for use by other applications.
Rob
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