Return-path: Received: from mout.gmx.net ([212.227.15.19]:51986 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755430Ab3JJTEM (ORCPT ); Thu, 10 Oct 2013 15:04:12 -0400 Received: from [192.168.2.100] ([93.218.71.155]) by mail.gmx.com (mrgmx103) with ESMTPSA (Nemesis) id 0MCL6r-1VdO4R01Gz-009BHb for ; Thu, 10 Oct 2013 21:04:10 +0200 Message-ID: <5256FA29.9010307@rempel-privat.de> (sfid-20131010_210415_101583_F11E29C7) Date: Thu, 10 Oct 2013 21:04:09 +0200 From: Oleksij Rempel MIME-Version: 1.0 To: Cedric VONCKEN , linux-wireless@vger.kernel.org Subject: Re: ATH9K: CST interrupt issue References: <773DB8A82AB6A046AE0195C68612A3190164B494@sbs2003.acksys.local> In-Reply-To: <773DB8A82AB6A046AE0195C68612A3190164B494@sbs2003.acksys.local> Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: Am 10.10.2013 17:49, schrieb Cedric VONCKEN: > I using the DNMA-H5 from unex and compat 2013-04-16. > > If the equipment with this card is placed in 30°C environment, with iperf I can send 150 Mbit/s. > > If the equipment with this card is placed in 0°C environment my throughput is not stable and is around 40Mbit/s. > In this condition, I receive some CST interrupt burst. If I correctly understand the ATH9K driver code, when this interruption occur the driver only increase the interrupt counter. > > Have you any information on this interrupt ? I googled but I don't found any information. CST - Carrier Sense Timeout. > Do you know if the driver need a specific action to handle it ? If yes, could you give me some pointer to do that ? I do not know. May be some body else knows. > How I can increase the timeout Value ? See AR_CST_TIMEOUT_LIMIT, it should be in useconds. > If I tried with other Wireless card (DNMA-83 from unex for example) I have not this problem. > > Any help will be appreciated. -- Regards, Oleksij