[LARTC] tc reliably hangs my system

* [LARTC] tc reliably hangs my system
@ 2002-07-03 16:33 Dimitris Zilaskos
  2002-07-03 16:47 ` Stef Coene
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: Dimitris Zilaskos @ 2002-07-03 16:33 UTC (permalink / raw)
  To: lartc

 kernel 2.4.18-ac3 smp , iproute2-2.4.7-now-ss020116-try.tar.gz

 I am using the following scripts to adjust my traffic during certain
periods of time , running them cron and sometimes by hand . They can
reliably freeze the system if they are run  certain number of times .
No oops/panic/errors of whatsoever , just a frozen system .

the following "fast" script freezes the system after it is executed 7-8
times

tc qdisc del dev eth0 root
tc qdisc add dev eth0 root handle 10: cbq bandwidth 100Mbit avpkt 1000
tc class add dev eth0 parent 10:0 classid 10:1 cbq bandwidth 100Mbit \
rate 100Mbit allot 1514 weight 10Mbit prio 8 maxburst 20 avpkt 1000
tc class add dev eth0 parent 10:1 classid 10:100 cbq bandwidth 100Mbit \
rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000
tc class add dev eth0 parent 10:1 classid 10:200 cbq bandwidth 100Mbit \
rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000

tc qdisc add dev eth0 parent 10:100 sfq quantum 1514b perturb 10
tc qdisc add dev eth0 parent 10:200 tbf rate 6Mbit latency 50ms burst \
50000
tc qdisc del dev eth0 ingress
tc qdisc add dev eth0 handle ffff: ingress
tc filter add dev eth0 parent ffff: protocol ip prio 2 u32 match ip \
protocol 1 0xFF police rate 1kbit burst 10000 mtu 1k drop flowid :1

tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip dst \
1.2.3.0/16 flowid 10:100
tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match tcp src \
22 0xffff match ip protocol 0x6 0xff flowid 10:100
tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip src \
1.2.3.25/32 flowid 10:200

 The following "slow" script freezes the system after being executed
around 11-18 times

tc qdisc del dev eth0 root
tc qdisc add dev eth0 root handle 10: cbq bandwidth 100Mbit avpkt 1000
tc class add dev eth0 parent 10:0 classid 10:1 cbq bandwidth 100Mbit \
rate 100Mbit allot 1514 weight 10Mbit prio 8 maxburst 20 avpkt 1000
tc class add dev eth0 parent 10:1 classid 10:100 cbq bandwidth 100Mbit \
rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000
tc class add dev eth0 parent 10:1 classid 10:200 cbq bandwidth 100Mbit \
rate 100Mbit allot 1514 weight 10Mbit prio 5 maxburst 20 avpkt 1000

tc qdisc add dev eth0 parent 10:100 sfq quantum 1514b perturb 10
tc qdisc add dev eth0 parent 10:200 tbf rate 3Mbit latency 50ms burst \
50000
tc qdisc del dev eth0 ingress
tc qdisc add dev eth0 handle ffff: ingress
tc filter add dev eth0 parent ffff: protocol ip prio 2 u32 match ip \
protocol 1 0xFF police rate 1kbit burst 10000 mtu 1k drop flowid :1

tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip dst \
1.2.3.0/16 flowid 10:100
tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match tcp src \
22 0xffff match ip protocol 0x6 0xff flowid 10:100

tc filter add dev eth0 parent 10: protocol ip prio 1 u32 match ip src \
1.2.3.25/32 flowid 10:200

 The ingress related parts are the prime suspects for me , i added them
recently . Before that no freezing has ever ocurred . I couldn't perform
more tests because the box is a rather busy server and the lockups cause
painfull reboots .

  Any advice is welcomed .

Kind regards ,
--
======================================
Dimitris Zilaskos

Department of Physics @ Aristotle Univercity of Thessaloniki , Greece
======================================
_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

^ permalink raw reply	[flat|nested] 8+ messages in thread