[atlas] probe resolution, overhead, or ...?
Randy Bush randy at psg.com
Wed Jun 20 13:01:09 CEST 2012
> My conclusion is: probes are just very slow. yes, it seems they are a bit slow. now that we know, we can calibrate our experiments to account for that. > They are fine for measuring multi millisecond delays on WAN links but > not for sub-millisecond delays on local links. some experiments care about jitter. we are seeing variance noticeably greater than bsd boxen. @stelios: yes icmp goes the slow path. but atlas has a very constrained measurment model, and it seems to be pretty much based on icmp. randy