Re: [libvirt-users] Fwd: Does Set Block IO tune take effect in the same session.

On 31.05.2013 07:05, vikrant verma wrote: > Hello Michal, > > Throttling is working now after setting inbound.average = 10 (i have > set other values to 0 ) > But i am observing an inconsistent behavior in the observed throttling > bandwidth > > when i set inbound.average = 10 , i observed bandwidth of 24 kbps > when i set inbound.average = 100 , i observed bandwidth of 186 kbps > when i set inbound.average = 1024 , i observed bandwidth of 2MBps > > i measured the above by doing scp of a 4MB file from host to VM. Is this > behavior is expected? > I don't think so. So your other values are set to 0? Can you share the actual <bandwidth/> element from 'virsh dumxpl $dom'? However, I might be hitting the same issue: # tc -s class show dev vnet0 class htb 1:1 root leaf 2: prio 0 rate 80000bit ceil 80000bit burst 1600b cburst 1600b Sent 5146972 bytes 3540 pkt (dropped 0, overlimits 0 requeues 0) rate 536752bit 45pps backlog 0b 4p requeues 0 lended: 359 borrowed: 0 giants: 0 tokens: -937499999 ctokens: -937499999 class sfq 2:36c parent 2: (dropped 0, overlimits 0 requeues 0) backlog 103018b 4p requeues 0 allot 1520 We can see both rate and ceil being 80kbit however the current rate being 536kbit. I wonder what's going on and how to fix this. > Regards, > Vikrant Michal