On Tue, Feb 15, 2011 at 4:13 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote: > On Mon, 2011-02-14 at 13:58 -0800, Nathaniel Smith wrote: >> I don't know. I take it you're imagining a scheme where mac80211 keeps >> a hash table or similar of all packets that have been queued to the >> device, and does its own tx rate estimation and calls start/stop_queue >> as needed? If that works, then it would be lovely. (Heck, it should >> probably go in the generic net layer eventually; ethernet cards have >> the same problem.) > > Well, no, why would it keep a hash table?? The current patch, whenever it queues a packet, stores t = the current time S = the current size of the queue so that later when the TX completes, it can compute (now - t)/S to estimate the per-packet transmission time. I just mean that you'd need somewhere to store this stuff, or else find another algorithm for rate estimation. -- Nathaniel -- 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
