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Date: Mon, 18 May 2009 11:39:02 +0100
From: Antonio Almeida <vexwek@...il.com>
To: Jarek Poplawski <jarkao2@...il.com>
Cc: netdev@...r.kernel.org, kaber@...sh.net, davem@...emloft.net,
devik@....cz
Subject: Re: HTB accuracy for high speed
Hi!
Here the information you asked:
# ethtool -k eth0
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: on
udp fragmentation offload: off
generic segmentation offload: off
# ethtool -k eth1
Offload parameters for eth1:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: on
udp fragmentation offload: off
generic segmentation offload: off
The bridge is between eth0 and eth1
---------------------------
Before traffic starts:
---------------------------
Analyser sent bytes: 0
Analyser sent packets: 0
Analyser received bytes: 0
Analyser received packets: 0
# tc -s -d class ls dev eth1
class htb 1:10 parent 1:2 rate 900000Kbit ceil 900000Kbit burst
113962b/8 mpu 0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level
5
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 990 ctokens: 990
class htb 1:1 root rate 900000Kbit ceil 900000Kbit burst 113962b/8 mpu
0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level 7
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 990 ctokens: 990
class htb 1:2 parent 1:1 rate 900000Kbit ceil 900000Kbit burst
113962b/8 mpu 0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level
6
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 990 ctokens: 990
class htb 1:108 parent 1:10 leaf 108: prio 7 quantum 1514 rate
555000Kbit ceil 555000Kbit burst 70901b/8 mpu 0b overhead 0b cburst
70901b/8 mpu 0b overhead 0b level 0
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 999 ctokens: 999
# ifconfig
br0 Link encap:Ethernet HWaddr 00:E0:ED:10:7C:6C
UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
eth0 Link encap:Ethernet HWaddr 00:E0:ED:10:7C:6C
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:69617616 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4154463648 (3.8 GiB) TX bytes:0 (0.0 b)
Base address:0x4000 Memory:e8200000-e8220000
eth1 Link encap:Ethernet HWaddr 00:E0:ED:10:7C:6D
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:50262048 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:1554907136 (1.4 GiB)
Base address:0x4040 Memory:e8220000-e8240000
eth3 Link encap:Ethernet HWaddr 00:11:25:C4:60:AF
inet addr:192.168.0.244 Bcast:19.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:461403 errors:0 dropped:0 overruns:0 frame:0
TX packets:13573 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:34150991 (32.5 MiB) TX bytes:1247864 (1.1 MiB)
Interrupt:27
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:188 (188.0 b) TX bytes:188 (188.0 b)
# tc -s qdisc
qdisc pfifo_fast 0: dev eth3 root bands 3 priomap 1 2 2 2 1 2 0 0 1 1
1 1 1 1 1 1
Sent 5459409 bytes 25647 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc htb 1: dev eth0 root r2q 10 default 0 direct_packets_stat 0
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 108: dev eth0 parent 1:108 limit 127p quantum 1514b perturb 15sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc htb 1: dev eth1 root r2q 10 default 0 direct_packets_stat 0
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 108: dev eth1 parent 1:108 limit 127p quantum 1514b perturb 15sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
---------------------
Traffic running:
---------------------
Analyser sent rate: 704218764 bits/s
Analyser received rate: 624942839 bits/s
# tc -s -d class ls dev eth1
class htb 1:10 parent 1:2 rate 900000Kbit ceil 900000Kbit burst
113962b/8 mpu 0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level
5
Sent 5772939852 bytes 7252437 pkt (dropped 0, overlimits 0 requeues 0)
rate 624826Kbit 97169pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 402 ctokens: 402
class htb 1:1 root rate 900000Kbit ceil 900000Kbit burst 113962b/8 mpu
0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level 7
Sent 5772939852 bytes 7252437 pkt (dropped 0, overlimits 0 requeues 0)
rate 624826Kbit 97169pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 402 ctokens: 402
class htb 1:2 parent 1:1 rate 900000Kbit ceil 900000Kbit burst
113962b/8 mpu 0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level
6
Sent 5772939852 bytes 7252437 pkt (dropped 0, overlimits 0 requeues 0)
rate 624826Kbit 97169pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 402 ctokens: 402
class htb 1:108 parent 1:10 leaf 108: prio 7 quantum 1514 rate
555000Kbit ceil 555000Kbit burst 70901b/8 mpu 0b overhead 0b cburst
70901b/8 mpu 0b overhead 0b level 0
Sent 5773001940 bytes 7252515 pkt (dropped 916587, overlimits 0 requeues 0)
rate 624826Kbit 97169pps backlog 0b 78p requeues 0
lended: 7252437 borrowed: 0 giants: 0
tokens: -10 ctokens: -10
# tc -s qdisc
qdisc pfifo_fast 0: dev eth3 root bands 3 priomap 1 2 2 2 1 2 0 0 1 1
1 1 1 1 1 1
Sent 5611186 bytes 26259 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc htb 1: dev eth0 root r2q 10 default 0 direct_packets_stat 0
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 108: dev eth0 parent 1:108 limit 127p quantum 1514b perturb 15sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc htb 1: dev eth1 root r2q 10 default 0 direct_packets_stat 0
Sent 7122619144 bytes 8948014 pkt (dropped 1130906, overlimits
10090666 requeues 0)
rate 0bit 0pps backlog 0b 70p requeues 0
qdisc sfq 108: dev eth1 parent 1:108 limit 127p quantum 1514b perturb 15sec
Sent 7122619144 bytes 8948014 pkt (dropped 1130906, overlimits 0 requeues 0)
rate 0bit 0pps backlog 55720b 70p requeues 0
---------------------------
After traffic stopped:
---------------------------
(traffic ran for 170 seconds)
Analyser sent bytes: 15143884800
Analyser sent packets: 18929856
Analyser received bytes: 13444564800
Analyser received packets: 16805706
# tc -s -d class ls dev eth1
class htb 1:10 parent 1:2 rate 900000Kbit ceil 900000Kbit burst
113962b/8 mpu 0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level
5
Sent 13377341976 bytes 16805706 pkt (dropped 0, overlimits 0 requeues 0)
rate 1061Mbit 2066pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 708 ctokens: 708
class htb 1:1 root rate 900000Kbit ceil 900000Kbit burst 113962b/8 mpu
0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level 7
Sent 13377341976 bytes 16805706 pkt (dropped 0, overlimits 0 requeues 0)
rate 1061Mbit 2066pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 708 ctokens: 708
class htb 1:2 parent 1:1 rate 900000Kbit ceil 900000Kbit burst
113962b/8 mpu 0b overhead 0b cburst 113962b/8 mpu 0b overhead 0b level
6
Sent 13377341976 bytes 16805706 pkt (dropped 0, overlimits 0 requeues 0)
rate 1061Mbit 2066pps backlog 0b 0p requeues 0
lended: 0 borrowed: 0 giants: 0
tokens: 708 ctokens: 708
class htb 1:108 parent 1:10 leaf 108: prio 7 quantum 1514 rate
555000Kbit ceil 555000Kbit burst 70901b/8 mpu 0b overhead 0b cburst
70901b/8 mpu 0b overhead 0b level 0
Sent 13377341976 bytes 16805706 pkt (dropped 2124150, overlimits 0 requeues 0)
rate 1061Mbit 2066pps backlog 0b 0p requeues 0
lended: 16805706 borrowed: 0 giants: 0
tokens: 503 ctokens: 503
# ifconfig
br0 Link encap:Ethernet HWaddr 00:E0:ED:10:7C:6C
UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
eth0 Link encap:Ethernet HWaddr 00:E0:ED:10:7C:6C
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:88547472 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2118475264 (1.9 GiB) TX bytes:0 (0.0 b)
Base address:0x4000 Memory:e8200000-e8220000
eth1 Link encap:Ethernet HWaddr 00:E0:ED:10:7C:6D
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:67067754 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:2114553248 (1.9 GiB)
Base address:0x4040 Memory:e8220000-e8240000
eth3 Link encap:Ethernet HWaddr 00:11:25:C4:60:AF
inet addr:192.168.0.244 Bcast:19.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:476452 errors:0 dropped:0 overruns:0 frame:0
TX packets:27435 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:35918090 (34.2 MiB) TX bytes:5939712 (5.6 MiB)
Interrupt:27
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:188 (188.0 b) TX bytes:188 (188.0 b)
# tc -s qdisc
qdisc pfifo_fast 0: dev eth3 root bands 3 priomap 1 2 2 2 1 2 0 0 1 1
1 1 1 1 1 1
Sent 5623502 bytes 26347 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc htb 1: dev eth0 root r2q 10 default 0 direct_packets_stat 0
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 108: dev eth0 parent 1:108 limit 127p quantum 1514b perturb 15sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc htb 1: dev eth1 root r2q 10 default 0 direct_packets_stat 0
Sent 13377341976 bytes 16805706 pkt (dropped 2124150, overlimits
18953263 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
qdisc sfq 108: dev eth1 parent 1:108 limit 127p quantum 1514b perturb 15sec
Sent 13377341976 bytes 16805706 pkt (dropped 2124150, overlimits 0 requeues 0)
rate 0bit 0pps backlog 0b 0p requeues 0
Thanks
Antonio Almeida
On Sat, May 16, 2009 at 9:31 AM, Jarek Poplawski <jarkao2@...il.com> wrote:
> On Fri, May 15, 2009 at 03:49:31PM +0100, Antonio Almeida wrote:
>> Hi!
>> I've been using HTB in a Linux bridge and recently I noticed that, for
>> high speed, the configured rate/ceil is not respected as for lower
>> speeds.
>> I'm using a packet generator/analyser to inject over 950Mpbs, and see
>> what returns back to it, in the other side of my bridge. Generated
>> packets have 800bytes. I noticed that, for several tc HTB rate/ceil
>> configurations the amount of traffic received by the analyser stays
>> the same. See this values:
>>
>> HTB conf Analyser reception
>> 476000Kbit 544.260.329
> ...
>> As you can see, class htb 1:108 rate's is 653124Kbit! Much bigger that
>> it's ceil.
>
> Is it for sure there is no gso/tso enabled on this dev (with up to
> date ethtool -k)? It would be nice to see also more details like
> .config, ifconfigs before and after the test, tc -s qdisc and bytes/
> packet number seen by this analyser, plus maybe some proof you can
> obtain such flows with something simpler like tbf. Of course using
> the current kernel, even if no difference, would give us more
> valuable perspective.
>
> Thanks,
> Jarek P.
>
Download attachment "config" of type "application/octet-stream" (60662 bytes)
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