5 ms·
I'd be worried about much more than 20ns. Someone email the ntp list not to long ago asking about getting nano-second resolution time, and one of the responses
by BCM43 14y ago
I'd be worried about much more than 20ns. Someone email the ntp list not to long ago asking about getting nano-second resolution time, and one of the responses pointed out that light travels about a foot in a second. So do you want the time on this side of the room, or that side?
- BCM43 14y agoWhoops, meant nanosecond. Thanks.
- alextp 14y agoA foot a second is off by several orders of magnitude. It's closer to 300 thousand km per second in vacuum, and around 200 thousand km per second in fiber.
- deleted 14y ago[deleted]
- lwat 14y agoHe obviously means a foot in a nanosecond.
- debacle 14y agoLight travels about 300000 km in a second. I think you meant nano-second.
- throwaway54-762 14y agoPresumably you meant, "travels about a foot in a nanosecond." From Google, "the speed of light / (10^9) = 0.299792458 m / s" -> about one foot.
- pdw 14y agoAs explained by Grace Hopper: http://highscalability.com/blog/2012/3/1/grace-hopper-to-programmers-mind-your-nanoseconds.html http://highscalability.com/blog/2012/3/1/grace-hopper-to-pro...
- jgrahamc 14y agoPrintable nanosecond for reference: http://blog.jgc.org/2012/10/a-downloadable-nanosecond.html http://blog.jgc.org/2012/10/a-downloadable-nanosecond.html