Hello lartc,
Testing some rules I found out that any rules are slowing down large pings!
For example:
tc qdisc add dev eth0 root handle 1: htb
tc class add dev eth0 parent 1: classid 1:1 htb rate 100Mbit prio 1 ceil 100Mbit
tc class add dev eth0 parent 1:1 classid 1:2 htb rate 100Mbit prio 2 ceil
100Mbit
tc filter add dev eth0 parent 1:0 prio 5 u32 \
match ip src 10.10.10.1 \
match ip dst 10.10.10.10 \
flowid 1:2
tc qdisc add dev eth0 parent 1:2 handle 2: sfq perturb 10
Small pings are ok - <10ms, here is output for 65500 byte pings:
Pinging test [10.10.10.1] with 65500 bytes of data:
Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64
Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64
Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64
Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64
Ping statistics for 10.10.10.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 120ms, Maximum = 120ms, Average = 120ms
If I don''t use any rules, 65500 byte pings are about ~10ms
Any filters are slowing large pings for 10 times!!!
What can I do to tune it up?
--
Best regards,
kasp mailto:waters@inbox.lv
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kasp wrote:> Hello lartc, > > Testing some rules I found out that any rules are slowing down large pings!I can''t reproduce this.> For example: > > tc qdisc add dev eth0 root handle 1: htb > tc class add dev eth0 parent 1: classid 1:1 htb rate 100Mbit prio 1 ceil 100Mbit > tc class add dev eth0 parent 1:1 classid 1:2 htb rate 100Mbit prio 2 ceil 100Mbit> tc filter add dev eth0 parent 1:0 prio 5 u32 \Error for me unless I add protocol ip> match ip src 10.10.10.1 \ > match ip dst 10.10.10.10 \ > flowid 1:2 > tc qdisc add dev eth0 parent 1:2 handle 2: sfq perturb 10 > > Small pings are ok - <10ms, here is output for 65500 byte pings:10ms is high I get 0.3 with p200mmx +rtl8139 + cheapest switch I could find + cables made without crimping tool.> > Pinging test [10.10.10.1] with 65500 bytes of data: > > Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64 > Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64 > Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64 > Reply from 10.10.10.1: bytes=65500 time=120ms TTL=64 >I see 14ms> Ping statistics for 10.10.10.1: > Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), > Approximate round trip times in milli-seconds: > Minimum = 120ms, Maximum = 120ms, Average = 120ms > > If I don''t use any rules, 65500 byte pings are about ~10ms > Any filters are slowing large pings for 10 times!!! > What can I do to tune it up? >What kernel and hardware are you using? Andy. _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/