Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp1907915ybl; Thu, 5 Dec 2019 08:52:15 -0800 (PST) X-Google-Smtp-Source: APXvYqwjs+zSHCN5AgFW9W0iHZKiTpvHSlDb8spiYOOJuIEZ3a5oJmI+YOW5Uejr4JPzz0UbLWXP X-Received: by 2002:a05:6808:312:: with SMTP id i18mr8371816oie.44.1575564735788; Thu, 05 Dec 2019 08:52:15 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1575564735; cv=none; d=google.com; s=arc-20160816; b=IGEg9G86wDTDeYAywaInpWsXIrXKTaiaQr+tohYmfjwCeFEr8H3icgGZnVBENeiYVc 0xE46PdgZSAPdUGhw+kdmj5BnP/w1RHcXUKzVIi/uqVVAvTq/ImXTtriAHM2/9hv7sIS 6ki9YrxXrk0NGaSyv8AZkypSIU2wekXy4c/7/+bcmHIl68buI/GkgVwhVrN5s7bwGtxa esfjHokDdibOlthn/wlj2+LdjPcxkpXjZ6DpIa4xqCyJGodhK6JDJLgiWEngDwdO4YbG N3vFCjRyDHAEdE6kMo5+bf5PLgphCAdL9SHR1n44gcHEqsO6mrPGwS1uhFttrhg2OQG3 4wsA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :user-agent:references:in-reply-to:date:cc:to:from:subject :message-id; bh=2UqMa4UK9l5Uob7f5dPFlV1GPPi6jRS9zJe4s/d0Esg=; b=Sh4xiCJjBdCD0dsNaq6plCd7Hh/ZEMc57uwBfdGJxGVRk0kLIWZwtXffnVubUTCnH8 A4wFF/z58eKDpJMSOoPCQU/izUOKb1c6QQTWHQMyAUsoRWjcxV1OkzXuNEF0GRCWjp// 8r3RY3whbdV6X0rBgo3jWD+R6hltHZ7UPhrsOICNz6gnjQnhS36POp5aZEgSH3jzQyDE riKnC9y8uewRcfDuHDZG0mWRDGkNPRVwt6Ira3SFjwCe/+csxTSPZ3iwi1vOUC+3AfCI VFsWDJ7J8hm1HNyuYByAnzACYyX8Ys5rmwtBcPXztRpgwmc/6e4RwfjD0egb5qFlp6WA WNXQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-wireless-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-wireless-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l7si5235227oil.77.2019.12.05.08.52.04; Thu, 05 Dec 2019 08:52:15 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-wireless-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-wireless-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-wireless-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729964AbfLEQv6 (ORCPT + 99 others); Thu, 5 Dec 2019 11:51:58 -0500 Received: from s3.sipsolutions.net ([144.76.43.62]:58260 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729860AbfLEQv6 (ORCPT ); Thu, 5 Dec 2019 11:51:58 -0500 Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.92.3) (envelope-from ) id 1icuM6-004CRl-C5; Thu, 05 Dec 2019 17:51:54 +0100 Message-ID: <78d99dc334c880a12d15717c496a1b3c36b0c370.camel@sipsolutions.net> Subject: Re: debugging TXQs being empty From: Johannes Berg To: Ben Greear , Toke =?ISO-8859-1?Q?H=F8iland-J=F8rgensen?= Cc: linux-wireless@vger.kernel.org Date: Thu, 05 Dec 2019 17:51:52 +0100 In-Reply-To: <2e01fb1d5b8ff3335220231251f893c01c6c22d3.camel@sipsolutions.net> (sfid-20191205_174955_112616_B3AB68D5) References: <49288397-55b3-f49a-e277-5197d7c1bea3@candelatech.com> <2e01fb1d5b8ff3335220231251f893c01c6c22d3.camel@sipsolutions.net> (sfid-20191205_174955_112616_B3AB68D5) Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.2 (3.34.2-1.fc31) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On Thu, 2019-12-05 at 17:49 +0100, Johannes Berg wrote: > On Thu, 2019-12-05 at 08:37 -0800, Ben Greear wrote: > > > > All this seems to mean that the TCP stack isn't feeding us fast enough, > > > but is that really possible? > > > > Does UDP work better? > > Somewhat, I get about 1020-1030 Mbps. But still a TON of "TXQ of STA ... > is now empty" messages. Say this run got about 15 per second of those. That actually pegged a CPU in the test tool, so not sure I'm doing that correctly ... johannes