Hmmm, isn't interleaving bad for on line gamers ? Good for batch downloads but not for sessions with lots of interactions surely ?

Yes it is but getting max_delay turned down from 32ms to 8ms means that your added time overheads are minimised my pings are higher than when I was with Bulldog and Pipex but certainly not to the point of unplayable. Currently the servers I play on, both in Germany, I get a very steady 45-50ms.

Interesting, thanks

To do it correctly:

4530kbit on ipstream = 4000kbit - tcp overheads and computer setup etc
4530kbit on sky llu = 4530kbit - atm overheads - tcp overheads and computer setup etc

The ATM overheads are catered for in the IP Profile setting, it would be an ATM profile if it did not

I am well aware that LLU will waste less of the sync speed due to no IP Profile, but am trying to make sure people not are fooled into thinking that on LLU their sync speed should be their maximum IP throughput.

I was actually wrong in my initial post.

If we use your algorithm it would actually be this. Since 4544 gives the 4000 I made a mistake.

4530kbit on ipstream = 3500kbit - tcp overheads and computer setup etc
4530kbit on sky llu = 4530kbit - atm overheads - tcp overheads and computer setup etc

4530kbit on ipstream = 3500kbit - tcp overheads and computer setup etc

So, as near as makes no difference, 3.2Mbps.

4530kbit on sky llu = 4530kbit - atm overheads - tcp overheads and computer setup etc

So 3.7Mbps (around 32kbps less than an IPstream connection syncing at 4544kbps).


In this extreme example, LLU will be almost 0.5Mbps faster than an IPstream product with the same line speed.

Take it one step further (into the not to distant future of ADSL2+ WBC - provided by BTw), and an LLU connection could have a usable data throughput almost 1Mbps faster than available from a BT WBC product with the same line speed!

Whatever happens, if the background infrastructure is there to support it, an LLU connection will never have a maximum throughput lower than a BTw product, and will have a maximum throughput up to 0.5Mbps (1Mbps for WBC/ADSL2+) faster than a BTw product (for the same line speed), but the extra speed has little to do with overheads (IP or ATM) and everything to do with BT's profiling system.

and the example assumes the profile isnt stuck

it may be stuck lower eg. 1mbit

Edited by Chrysalis (Wed 06-Aug-08 03:21:43)