Problems using wondershaper on KVM guest
- by Daniele Testa
I am trying to limit bandwidth on one of my KVM guest using Wondershaper.
Doing something like this works fine:
wondershaper br23 9000 9000
Doing a wget with the setting above gives a download speed of about 1MB/sec like it should.
However, it seems this is the highest setting I can use, because setting it to this does not work:
wondershaper br23 10000 10000
Doing the same wget with the setting above downloads with full speed, about 70MB/sec in my case.
Running a status-check returns the following:
qdisc cbq 1: root refcnt 2 rate 10000Kbit (bounded,isolated) prio no-transmit
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
borrowed 0 overactions 0 avgidle 12500 undertime 0
qdisc sfq 10: parent 1:10 limit 127p quantum 1514b divisor 1024 perturb 10sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc sfq 20: parent 1:20 limit 127p quantum 1514b divisor 1024 perturb 10sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc sfq 30: parent 1:30 limit 127p quantum 1514b divisor 1024 perturb 10sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc ingress ffff: parent ffff:fff1 ----------------
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
class cbq 1: root rate 10000Kbit (bounded,isolated) prio no-transmit
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
borrowed 0 overactions 0 avgidle 12500 undertime 0
class cbq 1:1 parent 1: rate 10000Kbit (bounded,isolated) prio 5
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
borrowed 0 overactions 0 avgidle 12500 undertime 0
class cbq 1:10 parent 1:1 leaf 10: rate 10000Kbit prio 1
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
borrowed 0 overactions 0 avgidle 12500 undertime 0
class cbq 1:20 parent 1:1 leaf 20: rate 9000Kbit prio 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
borrowed 0 overactions 0 avgidle 12500 undertime 0
class cbq 1:30 parent 1:1 leaf 30: rate 8000Kbit prio 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
borrowed 0 overactions 0 avgidle 12500 undertime 0
What am I doing wrong? Does wondershaper have some kind of upper limit?
