Hi everybody, I am using TBF to limit the bandwidth in order to do some research tasks on an Cloud Gaming platform. Cloud Gaming delay requirements are very strict, so I need a plenty control over latency that TBF induces to the stream. I have read that in order to not induce any latency to the packets (just dispath or drop, without any queue), "limit" has to be equal to the "burst" parameter. I have tested that it is not true, because when using a too big burst and limit, RTT for the packet increase. So I read in the doc that to achieve the minimum latency, I have to set the burst at the minimun and according to this equation: Rate=burst*HZ. Where "rate" is the output rate that is wanted to be achieved and Hz is the user frequency of the linux Kernel. However, eve doing this i am not able to get the desired rate. I even change the grub parameter "nohz=off" to not have the idle kernel frequency mode and maintain a constant frecuency of 250Hz (which it supposed my kernel works) What I am missing in my approach? I am very stuck on this .. Could you please help me? :) This is the configuration I deduced from the exposition above to get a 5Mbit rate: sudo tc qdisc add dev XXX root handle 1: prio sudo tc qdisc add dev XXX parent 1:3 handle 30: \tbf rate 5mbit burst 2.5kb limit 2.5kb mtu 1515 mpu 54b sudo tc filter add dev XXX protocol ip parent 1:0 prio 3 u32 \match ip src 11.22.33.444 flowid 1:3 Thanks in advance, Alberto -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
