Re: [atlas] probe resolution, overhead, or ...?

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