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From: Kalle Valo <kvalo@qca.qualcomm.com>
To: Vu Hai NGUYEN <vh.nguyen@actiasodielec.fr>
Cc: Adrian Chadd <adrian@freebsd.org>,
	"ath10k@lists.infradead.org" <ath10k@lists.infradead.org>,
	Michal Kazior <michal.kazior@tieto.com>,
	Patrick CARNEIRO RODRIGUEZ <p.carneiro@actiasodielec.fr>,
	Ben Greear <greearb@candelatech.com>,
	Bartosz Markowski <bartosz.markowski@tieto.com>
Subject: Re: RE : RE : RE : Trouble shooting low rate MCS9 in 802.11ac
Date: Wed, 20 Aug 2014 17:51:35 +0300	[thread overview]
Message-ID: <87sikr43k8.fsf@kamboji.qca.qualcomm.com> (raw)
In-Reply-To: <EE97821C81277E459BEA5C6384C6F241014DDDD4DC37@srvexch01.SODIELEC.local> (Vu Hai NGUYEN's message of "Wed, 20 Aug 2014 16:13:13 +0200")

Vu Hai NGUYEN <vh.nguyen@actiasodielec.fr> writes:

>>> I'd cleaned all rules of iptables and removed all modules of
>>> iptables from kernel by command modprobe -r But there's still some
>>> process of netfilter process running. I disabled netfilter on
>>> bridge interface by writing 0 to these files:
>>> /proc/sys/net/bridge/bridge-nf-call-arptables
>>> /proc/sys/net/bridge/bridge-nf-call-iptables
>>> /proc/sys/net/bridge/bridge-nf-call-ip6tables
>>> and the performance increases from 500 to 550 Mbps (iperf in tcp
>>> reports between 530 ~ 570Mbps). There is no more process like
>>> "br_nf_pre_routing" and "br_nf_forward_ip". Do you think I can do
>>> anything more to strip down netfilter?
>
>>What do you get for UDP? That seems like pretty good TCP throughput.
>
> In VHT80 mode and rate forced to NSS3:MCS7, I can obtain 750 Mbps with
> less than 1% data lost (in both way, AP to STA and vice versa).
> Normally I can obtain 2/3 theory rate in practical (for expl NSS3:MCS3
> has 390 Mbps in theory, and if I force to that rate, my TCP throughput
> is around 270 Mbps). So I should obtain 650 Mbps in practical for TCP
> with NSS3:MCS7 (975 Mbps in theory). 570 Mbps is so far to 650 Mbps :(

Forcing the data rate isn't really optimal. Have you tried 10.2
firmware? I was told it has improvements in the rate control algorithm.

-- 
Kalle Valo

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  reply	other threads:[~2014-08-20 14:52 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-09 14:22 Throughput is very low Mamun Abu-Tair
2014-07-16 16:01 ` Bart Jooris
2014-07-17  5:21   ` Michal Kazior
2014-07-17 10:40     ` Trouble shooting low rate MCS9 in 802.11ac Vu Hai NGUYEN
2014-07-17 10:53       ` Bartosz Markowski
2014-07-17 12:22         ` RE : " Vu Hai NGUYEN
2014-07-17 12:42           ` Bartosz Markowski
2014-07-17 13:19             ` RE : " Vu Hai NGUYEN
2014-07-17 19:18               ` Adrian Chadd
2014-07-21 12:10                 ` Vu Hai NGUYEN
2014-07-25 12:22                   ` Vu Hai NGUYEN
2014-07-25 12:51                     ` Ben Greear
2014-07-28  7:32                       ` Vu Hai NGUYEN
2014-07-28 11:53                       ` RE : " Vu Hai NGUYEN
2014-07-28 16:08                         ` Ben Greear
2014-07-29  8:02                           ` Vu Hai NGUYEN
2014-07-29 15:04                             ` RE : " Vu Hai NGUYEN
2014-07-29 15:55                               ` Ben Greear
2014-07-30  6:26                               ` Michal Kazior
2014-07-31 10:02                                 ` Vu Hai NGUYEN
2014-08-18  9:45                                 ` Vu Hai NGUYEN
2014-08-19 18:26                                   ` Ben Greear
2014-08-20 14:13                                     ` Vu Hai NGUYEN
2014-08-20 14:51                                       ` Kalle Valo [this message]
2014-08-21 12:23                                         ` Vu Hai NGUYEN
2014-08-21 12:41                                           ` Michal Kazior
2014-08-26  8:32             ` Vu Hai NGUYEN
2014-08-26  8:55               ` Bartosz Markowski
2014-07-17 10:57       ` Michal Kazior
2014-07-17 12:42         ` RE : " Vu Hai NGUYEN

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