Hello, OVS guys, please, any idea on how this might be fixed? If I could provide any further info, please let me know..
BR nik On Wed, Jun 29, 2022 at 11:58:18AM +0200, Nikola Ciprich wrote: > I see.. let's wait if someone from OVS team joins the discussion.. :) > > > > > Alright, so with a regular TAP, outside of OVS reach I get the following > > for the above input: > > > > # tc class show dev vnet0 > > class htb 1:1 root leaf 2: prio 0 rate 102400Kbit ceil 102400Kbit burst > > 1587b cburst 1587b > > > > # tc filter show dev vnet0 ingress > > filter parent ffff: protocol all pref 49152 u32 chain 0 > > filter parent ffff: protocol all pref 49152 u32 chain 0 fh 800: ht divisor > > 1 > > filter parent ffff: protocol all pref 49152 u32 chain 0 fh 800::800 order > > 2048 key ht 800 bkt 0 flowid :1 not_in_hw > > match 00000000/00000000 at 0 > > police 0x2 rate 102400Kbit burst 12800Kb mtu 64Kb action drop overhead 0b > > ref 1 bind 1 > > > > And 102400Kbit = 12800KiB which is the input value. Therefore, what we > > really need here is confirmation from OVS team about the units for QoS. > > Unfortunately, it's NOT documented (I don't quite understand why). > > > > I've found an example here [1] where to limit ingress at 10Mbps they > > suggest: > > > > ovs-vsctl set interface vif1.0 ingress_policing_rate=10000 > > > > which means that the unit for ingress_policing_rate is kbps. Therefore, > > 12800KiB/s (your input) times 8 (bits in byte) = 102400 (kbit/s) which > > is what libvirt generates. So why OVS configures something else? > > > > If only there was a way to tell OVS to not clear QoS set from outside, > > we could avoid this regression. But there isn't. > > > > 1: https://docs.openvswitch.org/en/latest/faq/qos/ > > > > Michal > > > > -- > ------------------------------------- > Ing. Nikola CIPRICH > LinuxBox.cz, s.r.o. > 28.rijna 168, 709 00 Ostrava > > tel.: +420 591 166 214 > fax: +420 596 621 273 > mobil: +420 777 093 799 > www.linuxbox.cz > > mobil servis: +420 737 238 656 > email servis: ser...@linuxbox.cz > ------------------------------------- > -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28.rijna 168, 709 00 Ostrava tel.: +420 591 166 214 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: ser...@linuxbox.cz ------------------------------------- _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
