On 2012-12-03 10:21 -0800, Paul Stoaks wrote 'Georgiewskiy Yuriy' and...': i test with ping -A size 64 and 1500 bytes, and with iperf with default parameters plus just -c -i1 -t100500 PS>What kind of traffic are you pushing through (packet sizes?) Are they fixed PS>size, fixed rate, or ...? PS> PS>Paul PS> PS> PS>-----Original Message----- PS>From: linux-wireless-owner@xxxxxxxxxxxxxxx PS>[mailto:linux-wireless-owner@xxxxxxxxxxxxxxx] On Behalf Of Georgiewskiy PS>Yuriy PS>Sent: Monday, December 03, 2012 7:44 AM PS>To: Chaoxing Lin PS>Cc: linux-wireless@xxxxxxxxxxxxxxx PS>Subject: RE: help: 802.11s bad performance with 802.11n enabled PS> PS>On 2012-12-03 14:56 -0000, Chaoxing Lin wrote Georgiewskiy Yuriy: PS> PS>CL>CL>For experiment, I changed ath9k driver to disable 802.11n packet PS>aggregation. The network becomes much better. PS>CL>CL>It's as stable as running 802.11a only mode. PS>CL>CL>So it seems that the aggregation plays a big role in in-stability of PS>802.11s network with 802.11n. PS>CL>CL>Any one has any idea why? PS>CL> PS>CL>Can you post a patch? i want test this too. PS>CL> PS>CL>The change is easy PS>CL>In ath9k/init.c PS>CL>Function ath9k_set_hw_capab() PS>CL>Replace below PS>CL> if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) PS>CL> hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION; with PS>CL> hw->flags &= ~IEEE80211_HW_AMPDU_AGGREGATION; PS> PS>On first look in my case disabled aggregation reduces packet loss, link is PS>more reliable, but it's also drop throughput to 15-20 Mbits/sec from about PS>~50 with aggregation enabled. PS> PS>C уважением With Best Regards PS>Георгиевский Юрий. Georgiewskiy Yuriy PS>+7 4872 711666 +7 4872 711666 PS>факс +7 4872 711143 fax +7 4872 711143 PS>Компания ООО "Ай Ти Сервис" IT Service Ltd PS>http://nkoort.ru http://nkoort.ru PS>JID: GHhost@xxxxxxxxxx JID: GHhost@xxxxxxxxxx PS>YG129-RIPE YG129-RIPE PS> PS>-- PS>To unsubscribe from this list: send the line "unsubscribe linux-wireless" in PS>the body of a message to majordomo@xxxxxxxxxxxxxxx PS>More majordomo info at http://vger.kernel.org/majordomo-info.html PS> C уважением With Best Regards Георгиевский Юрий. Georgiewskiy Yuriy +7 4872 711666 +7 4872 711666 факс +7 4872 711143 fax +7 4872 711143 Компания ООО "Ай Ти Сервис" IT Service Ltd http://nkoort.ru http://nkoort.ru JID: GHhost@xxxxxxxxxx JID: GHhost@xxxxxxxxxx YG129-RIPE YG129-RIPE
