seanadams;174097 Wrote: > One thing that is interesting about the Ubicom platform we use is that > they implement the ethernet MAC in software.
I assumed you used a Ethernet MAC chipset, which are relatively cheap these days and can do hardware cut through, but software is even less expensive. This is an important point, thanks for the clarification. So, let's calculate. Assuming the wireless is working at full data rate, 54 Mb/s, a maximum size Ethernet packet of 1500 bytes, serialization time is about .2 ms. Double that if you get only 24 Mb/s to .5 ms. x 2 for input & output is 1 ms (which is only true for wired Ethernet devices). If we assume .1 ms (20K instructions at 200 MHz?) to make the switching decision (I hope not, but let's say) you have about 1 ms rounded per wireless "hop" in .11g land. So, it still doesn't matter... Lots and lots of "hops" before TCP even begins to notice the bandwidth delay product. If we were dealing with 1 Mb/s connections or lower, yep, you are right it would matter but we wouldn't be streaming FLAC. Serialization delay on 1 Mb/s connections is 12ms x 2 = 25 ms per hop. -- Eric Carroll ------------------------------------------------------------------------ Eric Carroll's Profile: http://forums.slimdevices.com/member.php?userid=9293 View this thread: http://forums.slimdevices.com/showthread.php?t=31850 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
