Hello
I am using traffic control tools to schedule the outgoing traffic
using deficit round robin discipline, maybe there are better alg than
drr like codel but deficit-round robin was chosen as case study. the
tests are performed on a virtual environment using xen hypervisor.
Hereis my scenario:
eth0------| bridge |---------+----- vif1.0 domU 192.168.1.115
| |
| +----- vif2.0 domU 2 192.168.1.117
dom0 |
+----- vif3.0 domU 3 192.168.1.120
|
+ ... ... ...
|
+---- vif10.0 domU 10 192.168.1.127
And i use this config:
tc qdisc add dev eth0 root handle 1: tbf rate 100Mbit burst 5K latency 30ms
tc qdisc add dev eth0 handle 2: parent 1: drr
tc class add dev eth0 parent 2: classid 2:1 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:2 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:3 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:4 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:5 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:6 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:7 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:8 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:9 drr quantum 1514
tc class add dev eth0 parent 2: classid 2:10 drr quantum 1514
######################################
tc qdisc add dev eth0 parent 2:1 handle 10: pfifo limit 1000
tc qdisc add dev eth0 parent 2:2 handle 11: pfifo limit 1000
........... ............ ...........................
................ ...........
tc qdisc add dev eth0 parent 2:9 handle 18: pfifo limit 1000
tc qdisc add dev eth0 parent 2:10 handle 19: pfifo limit 1000
#######################################
tc filter add dev eth0 protocol ip parent 2: prio 1 u32 match ip src
192.168.1.120 classid 2:1
tc filter add dev eth0 protocol ip parent 2: prio 2 u32 match ip src
192.168.1.121 classid 2:2
..... .......... ................. ................ ...............
.............. ......... ............... .......
tc filter add dev eth0 protocol ip parent 2: prio 10 u32 match ip src
192.168.1.117 classid 2:10
For a moment it seems like it was working but after 50sec the
bandwith on every virtual machine cut off.
The output of command ' tc -s qdisc show dev eth0 ' generated this output:
qdisc tbf 1: root refcnt 6 rate 100000Kbit burst 5100b lat 30.0ms
Sent 12964998 bytes 8927 pkt (dropped 3159, overlimits 323 requeues 0)
backlog 0b 0p requeues 0
qdisc drr 2: parent 1:
Sent 12964998 bytes 8927 pkt (dropped 316, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc pfifo 10: parent 2:1 limit 1000p
Sent 1391636 bytes 966 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc pfifo 11: parent 2:2 limit 1000p
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc pfifo 12: parent 2:3 limit 1000p
Sent 2827908 bytes 1922 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc pfifo 13: parent 2:4 limit 1000p
................ ............. ...........................
............. ................ ................... ........
backlog 0b 0p requeues 0
qdisc pfifo 19: parent 2:10 limit 1000p
Sent 2038816 bytes 1392 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
to be sure that i didnt have made any mistake i make many test with
different conf parameters but no result, as another case i was
considering using htb with drr
as show above:
tc qdisc add dev eth0 root handle 1: htb
#######################################################################################|
tc class add dev eth0 parent 1: classid 1:1 htb rate 100Mbit ceil 100Mbit
#######################################################################################|
tc qdisc add dev eth0 parent 1:1 handle 2: drr
##_____________________________________________________________________________________|
tc class add dev eth0 parent 2: classid 2:1 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:2 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:3 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:4 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:5 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:6 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:7 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:8 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:9 drr quantum 1600
tc class add dev eth0 parent 2: classid 2:10 drr quantum 1600
########################################################################################|
tc qdisc add dev eth0 parent 2:1 handle 10: bfifo limit 9000
tc qdisc add dev eth0 parent 2:2 handle 11: bfifo limit 9000
tc qdisc add dev eth0 parent 2:3 handle 12: bfifo limit 9000
tc qdisc add dev eth0 parent 2:4 handle 13: bfifo limit 9000
tc qdisc add dev eth0 parent 2:5 handle 14: bfifo limit 9000
tc qdisc add dev eth0 parent 2:6 handle 15: bfifo limit 9000
tc qdisc add dev eth0 parent 2:7 handle 16: bfifo limit 9000
tc qdisc add dev eth0 parent 2:8 handle 17: bfifo limit 9000
tc qdisc add dev eth0 parent 2:9 handle 18: bfifo limit 9000
tc qdisc add dev eth0 parent 2:10 handle 19: bfifo limit 9000
#########################################################################################|
#
tc filter add dev eth0 parent 2: protocol ip prio 1 u32 match ip src
192.168.1.120 classid 2:1
tc filter add dev eth0 parent 2: protocol ip prio 2 u32 match ip src
192.168.1.121 classid 2:2
tc filter add dev eth0 parent 2: protocol ip prio 3 u32 match ip src
192.168.1.122 classid 2:3
tc filter add dev eth0 parent 2: protocol ip prio 4 u32 match ip src
192.168.1.123 classid 2:4
tc filter add dev eth0 parent 2: protocol ip prio 5 u32 match ip src
192.168.1.124 classid 2:5
tc filter add dev eth0 parent 2: protocol ip prio 6 u32 match ip src
192.168.1.125 classid 2:6
tc filter add dev eth0 parent 2: protocol ip prio 7 u32 match ip src
192.168.1.126 classid 2:7
tc filter add dev eth0 parent 2: protocol ip prio 8 u32 match ip src
192.168.1.127 classid 2:8
tc filter add dev eth0 parent 2: protocol ip prio 9 u32 match ip src
192.168.1.115 classid 2:9
tc filter add dev eth0 parent 2: protocol ip prio 10 u32 match ip src
192.168.1.117 classid 2:10
but i run "tc -s qdisc show dev eth0 "
disc htb 1: root refcnt 6 r2q 10 default 0 direct_packets_stat 1702133
Sent 2570651055 bytes 1702087 pkt (dropped 11408370, overlimits 0
requeues 1658292)
backlog 0b 0p requeues 1658292
qdisc drr 2: parent 1:1
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 10: parent 2:1 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 11: parent 2:2 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 12: parent 2:3 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 13: parent 2:4 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 14: parent 2:5 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 15: parent 2:6 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 16: parent 2:7 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 17: parent 2:8 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 18: parent 2:9 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc bfifo 19: parent 2:10 limit 9000b
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
It seems like no packet is entering in the qdisc instead they are
directly put in htb qdisc without being scheduled by round robin
Which can be the problem in both two situations ?
Thanks in advance
Ronald
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