[CC'ing crossbow-discuss] Although 1200 kbps is supported, a lot depends on the other side as well. This is specially true for TCP where if you set the limit too low and the other side runs uncontrolled (i.e. too fast), we will be forced to drop packets and TCP typically reacts badly to that. UDP apps have their own issues under very low bandwidth limits.
In practice, we have seen TCP do fairly well (on 1 gigE links) with bandwidth limits around 30-40 Mbps or more (the achieved speed will very closely mirror configured limit). UDP depends a bit more on sender and packet size etc but at 50 Mbps limit, gets close to the configured limit. Cheers, Sunay John Levon wrote: > The minimum is set at 1200Kbits/second. However, in testing, if I set > that for a VNIC, the domU gets no traffic at all (maybe the occassional > packet). Is the minimum too low? > > If I set a maximum of 2000Kbits/second, I get this from nicstat > (expecting around 250Kbytes/s total: > > Time Int rKB/s wKB/s rPk/s wPk/s rAvs wAvs %Util Sat > 04:35:38 xvm15_0 146.6 5.32 102.0 73.65 1471.3 74.00 62.21 0.00 > 04:35:43 xvm15_0 161.6 5.92 112.0 82.24 1477.4 73.68 68.60 0.00 > > What is the expected accuracy of the bandwidth limiting? > > I'm using b111. > > thanks > john > _______________________________________________ > xen-discuss mailing list > xen-discuss at opensolaris.org
