[LARTC] HFSC and default qdisc backlog
Thanks for all of your help Patrick! Just so I'm clear. If hfsc at the class level shows no overlimits and no packet dropps, then hfsc is not effecting my traffic any different (from a throughput perspective computational computer slowness aside) then if i had no traffic shapping in place? ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
[LARTC] HFSC and default qdisc backlog
I don't understand the following: [EMAIL PROTECTED]:~# tc -s class ls dev vlan1 && tc -s qdisc ls dev vlan1 class hfsc 1: root Sent 0 bytes 0 pkts (dropped 0, overlimits 0) period 0 level 2 class hfsc 1:1 parent 1: sc m1 0bit d 0us m2 22bit ul m1 0bit d 0us m2 22bit Sent 0 bytes 0 pkts (dropped 0, overlimits 0) period 31304 work 7533852 bytes level 1 class hfsc 1:10 parent 1:1 sc m1 1024bit d 8.0ms m2 10bit ul m1 0bit d 0us m2 22bit Sent 6892869 bytes 33300 pkts (dropped 0, overlimits 0) period 32750 work 6892869 bytes rtwork 6725586 bytes level 0 class hfsc 1:20 parent 1:1 sc m1 4096bit d 100.0ms m2 75000bit ul m1 0bit d 0us m2 22bit Sent 0 bytes 0 pkts (dropped 0, overlimits 0) period 0 level 0 class hfsc 1:30 parent 1:1 sc m1 8200bit d 200.0ms m2 3bit ul m1 0bit d 0us m2 22bit Sent 640821 bytes 636 pkts (dropped 0, overlimits 0) period 277 work 640821 bytes rtwork 199829 bytes level 0 class hfsc 1:40 parent 1:1 sc m1 8200bit d 300.0ms m2 15008bit ul m1 0bit d 0us m2 22bit Sent 162 bytes 3 pkts (dropped 0, overlimits 0) period 3 work 162 bytes rtwork 162 bytes level 0 qdisc hfsc 1: default 30 Sent 7537524 bytes 33953 pkts (dropped 6, overlimits 4145) backlog 3p Why is the qdisc backloged with dropped packets and overlimits when the classes are not? The txlen on the vlan1 device is 1000. This is happening with 256kbit up dsl with only one voip conversation utilizing the link (90kbit codec). The voice is occasionally gets choppy and I'm trying to figure out if it is due to the backlog or my setup etc? What tools are availabe to debug this stuff? Thanks for all of your insight and a VERY informative mailing list. ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
RE: [LARTC] hfsc and dropped packets
Thanks for the reply! Setting the tx_queue_len fixed the drops which got rid of the studder in voip! Thanks. -Original Message- From: Patrick McHardy [mailto:[EMAIL PROTECTED] Sent: Monday, March 13, 2006 6:03 PM To: James Nelson Cc: lartc@mailman.ds9a.nl Subject: Re: [LARTC] hfsc and dropped packets Patrick McHardy wrote: > James Nelson wrote: > >>[EMAIL PROTECTED]:/jmn# tc class show dev vlan1 [...] >> >>Why is there dropped packets but nothing overlimits?? > > > Overlimits counts dequeue-attempts that were unsuccessful because of > qdisc limits. Drops usually occur when the inner qdisc is full during > enqueue, so they have quite opposite meanings. BTW, in your case the drops most likely occur because HFSC's default pfifo child qdiscs use the tx_queue_len of the device as their limit, which in case of vlan devices is zero (in that case 1 is used). So you can either increase the tx_queue_len of the vlan device or manually add child qdiscs with bigger limits. ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
[LARTC] hfsc and dropped packets
Hi, I'm trying to get a handle on hfsc. Here is my configuration: [EMAIL PROTECTED]:/jmn# tc class show dev vlan1 class hfsc 1: root class hfsc 1:1 parent 1: ls m1 0bit d 0us m2 225000bit ul m1 0bit d 0us m2 225000bit class hfsc 1:10 parent 1:1 rt m1 191000bit d 25.0ms m2 135000bit ls m1 0bit d 0us m2 135000bit ul m1 0bit d 0us m2 225000bit class hfsc 1:20 parent 1:1 rt m1 22008bit d 25.0ms m2 56008bit ls m1 0bit d 0us m2 56008bit ul m1 0bit d 0us m2 225000bit class hfsc 1:30 parent 1:1 rt m1 11008bit d 25.0ms m2 22008bit ls m1 0bit d 0us m2 22008bit ul m1 0bit d 0us m2 225000bit class hfsc 1:40 parent 1:1 rt m1 0bit d 25.0ms m2 11008bit ls m1 0bit d 0us m2 11008bit ul m1 0bit d 0us m2 225000bit And here is the stats right after I run the qos script with no load on the link(adsl): [EMAIL PROTECTED]:/jmn# tc -s class show dev vlan1 class hfsc 1: root Sent 0 bytes 0 pkts (dropped 0, overlimits 0) period 0 level 2 class hfsc 1:1 parent 1: ls m1 0bit d 0us m2 225000bit ul m1 0bit d 0us m2 225000bit Sent 0 bytes 0 pkts (dropped 0, overlimits 0) period 349 work 42417 bytes level 1 class hfsc 1:10 parent 1:1 rt m1 191000bit d 25.0ms m2 135000bit ls m1 0bit d 0us m2 135000bit ul m1 0bit d 0us m2 225000bit Sent 31297 bytes 304 pkts (dropped 18, overlimits 0) period 304 work 31297 bytes rtwork 30991 bytes level 0 class hfsc 1:20 parent 1:1 rt m1 22008bit d 25.0ms m2 56008bit ls m1 0bit d 0us m2 56008bit ul m1 0bit d 0us m2 225000bit Sent 7302 bytes 17 pkts (dropped 2, overlimits 0) period 17 work 7302 bytes rtwork 7010 bytes level 0 class hfsc 1:30 parent 1:1 rt m1 11008bit d 25.0ms m2 22008bit ls m1 0bit d 0us m2 22008bit ul m1 0bit d 0us m2 225000bit Sent 3818 bytes 28 pkts (dropped 0, overlimits 0) period 28 work 3818 bytes rtwork 3818 bytes level 0 class hfsc 1:40 parent 1:1 rt m1 0bit d 25.0ms m2 11008bit ls m1 0bit d 0us m2 11008bit ul m1 0bit d 0us m2 225000bit Sent 0 bytes 0 pkts (dropped 0, overlimits 0) period 0 level 0 Why is there dropped packets but nothing overlimits?? Thanks. FYI Here is the relevant scipt commands I have dsl 1.5down and 256up. + tc qdisc del dev vlan1 root + tc qdisc add dev vlan1 root handle 1: hfsc default 30 + tc class add dev vlan1 parent 1: classid 1:1 hfsc ls rate 225kbit ul rate 225kbit + tc class add dev vlan1 parent 1:1 classid 1:10 hfsc rt m1 191kbit d 25ms m2 135kbit ls rate 135kbit ul rate 225kbit + tc class add dev vlan1 parent 1:1 classid 1:20 hfsc rt m1 22kbit d 25ms m2 56kbit ls rate 56kbit ul rate 225kbit + tc class add dev vlan1 parent 1:1 classid 1:30 hfsc rt m1 11kbit d 25ms m2 22kbit ls rate 22kbit ul rate 225kbit + tc class add dev vlan1 parent 1:1 classid 1:40 hfsc rt m1 0kbit d 25ms m2 11kbit ls rate 11kbit ul rate 225kbit + tc filter add dev vlan1 parent 1: prio 1 protocol ip handle 1 fw flowid 1:10 + tc filter add dev vlan1 parent 1: prio 2 protocol ip handle 2 fw flowid 1:20 + tc filter add dev vlan1 parent 1: prio 3 protocol ip handle 3 fw flowid 1:30 + tc filter add dev vlan1 parent 1: prio 4 protocol ip handle 4 fw flowid 1:40 ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
