В Вто, 29/04/2008 в 15:53 +0300, Покотиленко Костик пишет: > Hi there, > > I've been using SFQ as the ending for every class of HTB for very > long. All working just as expected. > > After implementing the abillity to do "limited speed, unlimited > traffic" clients I've experienced SFQ not being fair for those. > Precisilly, one of several connections gets bandwidth other stailed or > they run in turn. > > Setup: > > 1. There are 2 HTB classes for "limited speed, unlimited traffic" > clients each direction each ending with SFQ: > - base class (3:9900): for traffic < limit (2.5 Mbit/s for all) > - land class (3:9910): for landing traffic > limit (1 kbit/s for all) > > 2. For each of those clients I insert 2 tc filters each direction: > - tc filter add dev $IN_DEV parent $IN_PARENT_CLASS protocol ip prio > 10 handle $HANDLE10 fw police rate $IN_RATE buffer 10k continue > classid $IN_BASE_CLASS > - tc filter add dev $IN_DEV parent $IN_PARENT_CLASS protocol ip prio > 11 handle $HANDLE10 fw classid $IN_LAND_CLASS > > All this work perfect except SFQ fairness/flow speed division. > > My thinkings: > > # tc -s -d qdisc ls dev eth3 (filtered) > qdisc sfq 9900: parent 3:9900 limit 128p quantum 1514b flows 128/1024 > perturb 10sec > Sent 23753684098 bytes 71470965 pkt (dropped 0, overlimits 0 requeues 0) > rate 0bit 0pps backlog 0b 0p requeues 0 > qdisc sfq 9910: parent 3:9910 limit 128p quantum 1514b flows 128/1024 > perturb 10sec > Sent 38036550 bytes 26648 pkt (dropped 1320085, overlimits 0 requeues 0) > rate 0bit 0pps backlog 162525b 126p requeues 0 > > In the "land" class there are too many droped packets. That's logical > because the rate is low (1 kbit/s) and there are only 128 packets > length queue. I think this is causing problems/unfairness because > droped packets means tcp retransmitions in best case and reconnects in > worst. > > I didn't found a way to encrease the limit of 128 packet for the SFQ > it probably complile time limit. > > Any hints/suggestions on how to tune SFQ? Any hints? Maybe wrong list? -- Покотиленко Костик <casper@xxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
