netdev - Re: [PATCH iproute2] Re: HTB accuracy for high speed

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Date:	Fri, 22 May 2009 18:42:16 +0100
From:	Antonio Almeida <vexwek@...il.com>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	Stephen Hemminger <shemminger@...tta.com>, netdev@...r.kernel.org,
	kaber@...sh.net, davem@...emloft.net, devik@....cz,
	Eric Dumazet <dada1@...mosbay.com>,
	Vladimir Ivashchenko <hazard@...ncoudi.com>
Subject: Re: [PATCH iproute2] Re: HTB accuracy for high speed

On Thu, May 21, 2009 at 9:51 AM, Jarek Poplawski wrote:
> I still have no clue about the reason, but it would be really nice to
> do some short test with more current kernel (>= 2.6.27) and iproute2
> (to exclude the possibility of some incomaptibility in configs e.g.
> rate tables passed to htb).

I installed kernel 2.6.29 (finaly! wasn't easy... I couldn't set
memory split 2G/2G),
but the results are the same. I've already applied gen_estimator.c
patches (works fine).

# tc -s -d class ls dev eth1 | head -24
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 119955303928 bytes 150697618 pkt (dropped 0, overlimits 0 requeues 0)
 rate 621844Kbit 97651pps backlog 0b 0p requeues 0
 lended: 0 borrowed: 0 giants: 0
 tokens: 402 ctokens: 402

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 119955303928 bytes 150697618 pkt (dropped 0, overlimits 0 requeues 0)
 rate 621844Kbit 97651pps 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 119955366812 bytes 150697697 pkt (dropped 76696483, overlimits 0
requeues 0)
 rate 621847Kbit 97652pps backlog 0b 79p requeues 0
 lended: 150697618 borrowed: 0 giants: 0
 tokens: -5 ctokens: -5

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 119955303928 bytes 150697618 pkt (dropped 0, overlimits 0 requeues 0)
 rate 621844Kbit 97651pps backlog 0b 0p requeues 0
 lended: 0 borrowed: 0 giants: 0
 tokens: 402 ctokens: 402


# cat /sys/module/sch_htb/parameters/htb_hysteresis
0

# ethtool -k eth0
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: off
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: off
udp fragmentation offload: off
generic segmentation offload: off


I'm working on a newer iproute2.


  Antonio Almeida
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