From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qv1-xf2f.google.com (mail-qv1-xf2f.google.com [IPv6:2607:f8b0:4864:20::f2f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 184C33B29D; Tue, 18 Feb 2020 11:27:10 -0500 (EST) Received: by mail-qv1-xf2f.google.com with SMTP id dc14so9393042qvb.9; Tue, 18 Feb 2020 08:27:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:content-transfer-encoding:mime-version:subject:message-id:date :to; bh=DcNlD/rLmSyyVydy2UZloJhCjDSSMERqgRNhHocNDyo=; b=oPvYY1tE5kEScj/PC2JfD+J/sQGmpMl7wlS3mEPx3C6PZZXey2h0ELmPz2S1x+HgEW 2nlmk6mw1g2AoMomeLOQVoERFTqRQAVKtyyZcNehtpxcj7G6RNmYnTlDQqoRkJ+cZ1XT EwMe27CFYxqsIZcQhfswJfkHkkngHZ4eYH1H9fMZZ9DaT0Uj1dqut/CYY8eDJzEajTDs ziG3WtooBWZwgtwzvNYjdeoPMEctZ+5V5xqdjKmLQcJk3MmCHMKJTDQs/vGTq0RSv4ao tsUloKEI1ut+eq7dli/AduOET54N4UvxXo2/qevxl+BA30IXbN1C73i/n2RG2rTmfZc5 IPEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:mime-version :subject:message-id:date:to; bh=DcNlD/rLmSyyVydy2UZloJhCjDSSMERqgRNhHocNDyo=; b=W/0x/Qqvfvz/nGBrYvd8JslPWJUAE15upC8ZG2ZMfXFwXLBaQFC8qF5se/iDYD9Mam UQQ+k58ugu5vuazhlFJZkr+WSRyezUeT30uWmuxCX373tQgkHJ4KRy0Fi5t5Z+qvyZem irroXvbNjOiHgIT9UbfnF6FCg28fHRokGaf+aw5167vztUoyVroXXNjkcSXoXKhYXdDa W0ohEhGlWCLW1Rtj1Tol6Lbdo7QC70uoQ/eG1kHd10FpxM8zOwbB5J3QKPz/QzDRzmoP 9IukSnKRWwCyVLcjCf/2iJTlAUkEZcBC8Jm3Bbp6vKdnAW3Ji1xeBbyaQ/jOrIOndVoL iTLQ== X-Gm-Message-State: APjAAAUfu9FX81LFf7QU9NEBhNRhWiuRyEaol1KwoLHAGYneFPJFGyie lOy4D5arQl8GahBGl1KKflDp4/irzGU= X-Google-Smtp-Source: APXvYqyC0NaOzGKDV9QNLLqk8TMODMhpeKwnPTL0rTAFq7vlyN6ZaMu0+w/QUmMSuJK0zaxdE6jLIg== X-Received: by 2002:ad4:5009:: with SMTP id s9mr17173335qvo.30.1582043229426; Tue, 18 Feb 2020 08:27:09 -0800 (PST) Received: from richs-mbp-10337.lan ([64.223.173.60]) by smtp.gmail.com with ESMTPSA id k37sm2072399qtf.70.2020.02.18.08.27.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Feb 2020 08:27:09 -0800 (PST) From: Rich Brown Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 13.0 \(3608.60.0.2.5\)) Message-Id: Date: Tue, 18 Feb 2020 11:27:08 -0500 To: bloat@lists.bufferbloat.net, cerowrt-devel-request@lists.bufferbloat.net X-Mailer: Apple Mail (2.3608.60.0.2.5) Subject: [Bloat] Debugging a crash X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Feb 2020 16:27:10 -0000 Folks, I was running OpenWrt 19.07-rc2 on my Archer C7v2, and experienced a = potentially-repeatable crash under heavy network traffic load. I was uploading several long videos to Youtube (> 5GBytes each) and = watching Netflix on my 7mbps/768kbps DSL connection. Things were working = fine (latency remained acceptable - YAY SQM!) My upstream pipe (slow as = it is) was totally filled by the three competing uploads, and Netflix = was doing its best to show me the West Wing. A couple times during the evening, the Netflix stream just crapped out = and I lost the connection. (Infinite buffering message on-screen, = couldn't get to Google, etc. The LuCI GUI showed uptime of a minute or = so, and then things were fine again.) I now have OpenWrt 19.07.1 installed, and have a little bandwidth for = repeating the experiment. What debugging information should I turn on/look for in case this = happens again? Thanks. Rich PS The new Youtube uploader facility is excellent. If you keep the = window open, it automagically resumes the transfer after interruption. = It's great for people like me who have large files to upload on a slow = link, where the likelihood of a link failure (or needing to move my = laptop to a different location) is high.=