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