On Wed, 2006-10-11 at 16:25 +0300, Çağlar AKYÜZ wrote: > Actually I think this will not improve the performance of MAC. Because > ACK'ing of TCP frames is one of the major drawbacks which degrades > performance ( thanks to Delayed ACK algorithm!).
Only in a very limited set of circumstances will the delayed ACK algorithm result in poorer performance. Namely, when the TCP window has been set to a very small value. Changing this configuration option will remove any bottleneck that the delayed ACK algorithm is imposing. There are TCP extensions such as the "quickack" mode in linux's TCP stack that stop the use of delayed ACK during the slow start phase of TCP connections, but the performance difference that this is likely to lead to in lwIP is minimal. ACKing of packets can be arguably said in fact to increase performance, as without it the sender couldn't discover the maximum rate it could send without packet loss, and so if it didn't wish to lose data would have to be more conservative with how fast it sent packets. Kieran _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
