> almaop@xxxxxxxxx wrote:
> >>> From: almaop@xxxxxxxxx
> >>>> I'm not sure where is the bug - in the flow filter or in the sfq
> >> qdisc.
> >>
> >> Which SFQ qdisc is stalling?
> >>
> > Thanks for reply.
> > So I've done few tests. I've removed quantum 64 (it was qdisc with
> small packets). It made no difference. It looks like the key is the first
> sfq qdisc (tc qdisc add dev $DEV parent 1:2 handle 2: sfq - in my example).
> When there is no traffic in this qdisc for about 45 seconds (shorter time
> when there is no traffic at all on the interface) - it stalls. Other qdiscs
> stall also. So there is no packet flow on that interface. Removing filters
> ('flow' filters) does'nt help. I have to remove (all) sfq qdiscs. And then
> the traffic is resumed.
>
> Please capture the output of "tc -s -d qdisc show dev <dev>" and
> "tc -s -d class show dev <dev>" immediately after it stalls.
> I'm interested in the amount of bytes/packets queued at the moment.
>
I've captured it eve
It looks like this:
Example 1:
qdisc htb 1: root r2q 10 default 4 direct_packets_stat 3 ver 3.17
Sent 1206781 bytes 12855 pkt (dropped 0, overlimits 10539 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 2: parent 1:2 limit 127p quantum 1514b flows 127/1024
Sent 647460 bytes 9862 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 3: parent 1:3 limit 127p quantum 1514b flows 127/1024
Sent 449824 bytes 2745 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 4: parent 1:4 limit 127p quantum 1514b flows 127/1024
Sent 109233 bytes 244 pkt (dropped 1, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
class htb 1:1 root rate 624000bit ceil 624000bit burst 1912b/8 mpu 0b overhead 0b cburst 1912b/8 mpu 0b overhead 0b level 7
Sent 1206583 bytes 12852 pkt (dropped 0, overlimits 0 requeues 0)
rate 19104bit 13pps backlog 0b 0p requeues 0
lended: 4987 borrowed: 0 giants: 0
tokens: 22624 ctokens: 22624
class htb 1:2 parent 1:1 leaf 2: prio 3 quantum 1500 rate 120000bit ceil 160000bit burst 1659b/8 mpu 0b overhead 0b cburst 1679b/8 mpu 0b overhead 0b level 0
Sent 647460 bytes 9862 pkt (dropped 0, overlimits 0 requeues 0)
rate 4552bit 9pps backlog 0b 0p requeues 0
lended: 5451 borrowed: 4411 giants: 0
tokens: 101172 ctokens: 79297
class htb 1:3 parent 1:1 leaf 3: prio 4 quantum 3000 rate 240000bit ceil 560000bit burst 1719b/8 mpu 0b overhead 0b cburst 1880b/8 mpu 0b overhead 0b level 0
Sent 449824 bytes 2745 pkt (dropped 0, overlimits 0 requeues 0)
rate 2976bit 2pps backlog 0b 0p requeues 0
lended: 2177 borrowed: 568 giants: 0
tokens: 53386 ctokens: 24763
class htb 1:4 parent 1:1 leaf 4: prio 5 quantum 1500 rate 120000bit ceil 560000bit burst 1659b/8 mpu 0b overhead 0b cburst 1880b/8 mpu 0b overhead 0b level 0
Sent 109299 bytes 245 pkt (dropped 0, overlimits 0 requeues 0)
rate 11568bit 3pps backlog 0b 0p requeues 0
lended: 237 borrowed: 8 giants: 0
tokens: 101172 ctokens: 24763
Example 2:
(with longer txqueue)
qdisc htb 1: root r2q 10 default 4 direct_packets_stat 0 ver 3.17
Sent 17205588 bytes 211080 pkt (dropped 0, overlimits 199620 requeues 5)
rate 0bit 0pps backlog 0b 0p requeues 5
qdisc sfq 2: parent 1:2 limit 127p quantum 1514b flows 127/1024
Sent 11256846 bytes 179165 pkt (dropped 1200, overlimits 0 requeues 5)
rate 0bit 0pps backlog 0b 0p requeues 5
qdisc sfq 3: parent 1:3 limit 127p quantum 1514b flows 127/1024
Sent 5225274 bytes 30009 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 4: parent 1:4 limit 127p quantum 1514b flows 127/1024
Sent 723468 bytes 1906 pkt (dropped 8, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
class htb 1:1 root rate 624000bit ceil 624000bit burst 1912b/8 mpu 0b overhead 0b cburst 1912b/8 mpu 0b overhead 0b level 7
Sent 17207118 bytes 211085 pkt (dropped 0, overlimits 0 requeues 0)
rate 41968bit 42pps backlog 0b 0p requeues 0
lended: 85962 borrowed: 0 giants: 0
tokens: 12267 ctokens: 12267
class htb 1:2 parent 1:1 leaf 2: prio 3 quantum 1500 rate 120000bit ceil 160000bit burst 1659b/8 mpu 0b overhead 0b cburst 1679b/8 mpu 0b overhead 0b level 0
Sent 11256846 bytes 179165 pkt (dropped 0, overlimits 0 requeues 0)
rate 16496bit 37pps backlog 0b 0p requeues 0
lended: 95202 borrowed: 83968 giants: 0
tokens: 101172 ctokens: 79297
class htb 1:3 parent 1:1 leaf 3: prio 4 quantum 3000 rate 240000bit ceil 560000bit burst 1719b/8 mpu 0b overhead 0b cburst 1880b/8 mpu 0b overhead 0b level 0
Sent 5225274 bytes 30009 pkt (dropped 0, overlimits 0 requeues 0)
rate 1576bit 1pps backlog 0b 0p requeues 0
lended: 28163 borrowed: 1846 giants: 0
tokens: 510 ctokens: 24763
class htb 1:4 parent 1:1 leaf 4: prio 5 quantum 1500 rate 120000bit ceil 560000bit burst 1659b/8 mpu 0b overhead 0b cburst 1880b/8 mpu 0b overhead 0b level 0
Sent 723468 bytes 1906 pkt (dropped 0, overlimits 0 requeues 0)
rate 23880bit 4pps backlog 0b 0p requeues 0
lended: 1758 borrowed: 148 giants: 0
tokens: 3049 ctokens: 7974
Krzysiek
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