Re: [ntp:questions] Visualization of clock control

2012-02-08 Thread Carl Byington
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Thu, 12 Jan 2012 04:37:41 -0600, Hal Murray wrote: > 3) Flurry of web downloads. If I'm browsing the web, I occasionally > hit > a page with lots of pictures and such. Mozilla opens lots of TCP > connections. The round trip time goes over 3.5 se

Re: [ntp:questions] Visualization of clock control

2012-01-12 Thread David Lord
Hal Murray wrote: In article <20120105125942.GA15654@localhost>, Miroslav Lichvar writes: The other difficulty with respect to real life may be modeling network jitter as exponential, since I believe the probability distribution for network delays is heavy-tailed (i.e. with extreme values way

Re: [ntp:questions] Visualization of clock control

2012-01-05 Thread Miroslav Lichvar
On Thu, Jan 05, 2012 at 11:40:25AM +0800, Dennis Ferguson wrote: > On 4 Jan, 2012, at 22:54 , Miroslav Lichvar wrote: > > The simulations were done with a clock wandering at 1 ppb/s, > > 10/100/1000us network jitter with exponential distribution and the NTP > > clients were configured to use 64s po

Re: [ntp:questions] Visualization of clock control

2012-01-04 Thread Dennis Ferguson
On 4 Jan, 2012, at 22:54 , Miroslav Lichvar wrote: > Here are some example runs of the tool captured to animated gifs: > http://mlichvar.fedorapeople.org/clknetsim/chrony_ntp/vis/visclocks_10us.gif > http://mlichvar.fedorapeople.org/clknetsim/chrony_ntp/vis/visclocks_100us.gif > http://mlichvar.fe

[ntp:questions] Visualization of clock control

2012-01-04 Thread Miroslav Lichvar
Hi, I wrote a tool to visualize the data generated by the clknetsim simulator and I thought some of you might find it interesting. The goal was to show how a clock is controlled by NTP client and at the same time see its offset from true time and the NTP measurements (the actual offset and delay s