On 31/08/2011, at 1:58 AM, Jim Gettys wrote: > On 08/29/2011 11:42 PM, Adrian Chadd wrote: >> On 30 August 2011 11:34, Tom Herbert <therbert@xxxxxxxxxx> wrote: >> >> C(P) is going to be quite variable - a full frame retransmit of a 4ms >> long aggregate frame is SUM(exponential backoff, grab the air, >> preamble, header, 4ms, etc. for each pass.) >> > It's not clear to me that doing heroic measures to compute the cost is > going to be worthwhile due to the rate at which the costs can change on > wireless; just getting into the rough ballpark may be enough. But > buffering algorithms and AQM algorithms are going to need an estimate of > the *time* it will take to transmit data, more than # of bytes or packets. That's not heroic measures; mac80211 needs all the code to calculate these times anyway, it's just a matter of collecting together some things we already know and calling the right function. Andrew-- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
