Return-path: Received: from icf.org.ru ([91.193.236.10]:47816 "EHLO icf.org.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932847Ab2LHDXd (ORCPT ); Fri, 7 Dec 2012 22:23:33 -0500 Date: Sat, 8 Dec 2012 07:23:30 +0400 (MSK) From: Georgiewskiy Yuriy To: Thomas Pedersen cc: Chaoxing Lin , "linux-wireless@vger.kernel.org" , open11s Subject: Re: help: 802.11s bad performance with 802.11n enabled In-Reply-To: Message-ID: (sfid-20121208_042344_364267_2FFF552A) References: MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-1050998036-588890978-1354937010=:8165" Sender: linux-wireless-owner@vger.kernel.org List-ID: This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1050998036-588890978-1354937010=:8165 Content-Type: TEXT/PLAIN; charset=KOI8-R Content-Transfer-Encoding: 8BIT On 2012-12-07 19:17 -0800, Thomas Pedersen wrote Georgiewskiy Yuriy: ??, i try this and report results, can you also test on 2.4 Ggz? as i understand ch 149 is 802.11a? or this make no sense here? TP>Hi Chaoxing and Georgiewsky, TP> TP>On Mon, Dec 3, 2012 at 6:45 AM, Georgiewskiy Yuriy wrote: TP>> On 2012-12-03 14:37 -0000, Chaoxing Lin wrote linux-wireless@vger.kernel.org: TP>> TP>> CL>After a lot of experiments, here are various problems observed. TP>> CL> TP>> CL>1. The "Fail to stop Tx DMA" related issue plays a role. But not the major part. It accounts for about 3% of packet loss in my testbed. TP>> CL>Is anyone looking at this issue? This issue is now very easy to recreate. TP>> TP>> In my case it much more than 3%. TP> TP>With wireless-testing HEAD (671c924) I made the following observations TP>with 3 nodes in a mesh using ch. 149 HT20 on AR9280. TP> TP>1. ping -i0.1 does not cause aggregation to take place, and losses are 0% TP>2. a UDP iperf test with two nodes generating traffic shows losses TP>around 1%. We can observe aggregation taking place in this case. TP> TP>Can either of you guys reproduce this with the latest TP>wireless-testing? Also please CC devel@lists.open80211s.org on any TP>mesh bugs in the future. TP> TP>Thanks! TP>Thomas TP>-- TP>To unsubscribe from this list: send the line "unsubscribe linux-wireless" in TP>the body of a message to majordomo@vger.kernel.org TP>More majordomo info at http://vger.kernel.org/majordomo-info.html TP> C ????????? With Best Regards ???????????? ????. Georgiewskiy Yuriy +7 4872 711666 +7 4872 711666 ???? +7 4872 711143 fax +7 4872 711143 ???????? ??? "?? ?? ??????" IT Service Ltd http://nkoort.ru http://nkoort.ru JID: GHhost@icf.org.ru JID: GHhost@icf.org.ru YG129-RIPE YG129-RIPE ---1050998036-588890978-1354937010=:8165--