From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-x232.google.com (mail-ie0-x232.google.com [IPv6:2607:f8b0:4001:c03::232]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id B1927201B34; Thu, 21 Nov 2013 18:30:08 -0800 (PST) Received: by mail-ie0-f178.google.com with SMTP id lx4so1182122iec.9 for ; Thu, 21 Nov 2013 18:30:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=zfZS0mmhenrsEkbm8RkVCJrU5nPr2o2UZh5p1v8QLdU=; b=JsWGuS00tcbskx8fZPpZkIBD7HJI7VbkUEq7xNxYmn6BfHBn1EQgDHRrRBHD7Mk8pR L0eF6lvl3BUvWtGWkS1OooDPoa1ERlWhziGuOhVTy26Ng6KqXdKh8WTgjmfiAmbKtpBu P18xQ0yeviwymTbp0b2brJ8w63bbiyTKQSmgu0UTxW+pANTB+tJFThpmavkajlZfyDQ2 mhEAlKkbGX5mMyfIwSxZ2WyA2cuZfqZvdyHUm6jxw9NJGm37FIzZ92iJRUCZc3SxzFJ5 7zE4UYt9LS0GJTtWXs3ZTIlPidAyxgZjIu50/9eMwsigKuhu1VIoFS6qMdve8+C1h98p cSjg== MIME-Version: 1.0 X-Received: by 10.50.17.100 with SMTP id n4mr496639igd.11.1385087407800; Thu, 21 Nov 2013 18:30:07 -0800 (PST) Received: by 10.64.145.67 with HTTP; Thu, 21 Nov 2013 18:30:07 -0800 (PST) Date: Thu, 21 Nov 2013 18:30:07 -0800 Message-ID: From: Dave Taht To: "cerowrt-devel@lists.bufferbloat.net" , cerowrt@lists.bufferbloat.net Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: [Cerowrt-devel] speed problems with later versions of cero? X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Nov 2013 02:30:09 -0000 I've now had three private reports of "speed" problems with the latest cerowrt releases. All of them take serious uptime to occur. And unfortunately all the bug report(s) were, "oh, it got slow after everybody got home/ran a couple days, so I went back to the prior router". That's not helpful, and could well be new users blaming the change rather than something else, but it is possible that this is happening, so... IF that happens to anyone here, I'd like to request a couple things in roughly this order tcpdump -i ge00 -s 128 -w /tmp/myproblem.cap # for 10 seconds hit cntrl-c Send me the file pinging the box from the outside world # got packet loss? dmesg > /tmp/dmesg.log # send me the file logread > /tmp/logread.log # send me te file run top and see if there is a daemon running away tell me what ISP's network you are on... restart the aqm system and see if it goes away /etc/init.d/aqm restart try nfq_codel and/or pie instead of fq_codel 1) I am aware of an old bug with odhcp6 where it would start hammering the network with requests for an ipv6 address in a tight loop. I don't know what triggers it. (with AQM set right it is hardly noticeable but "feelable". However if your bandwidth setting is even mildly wrong, boom life gets bad and STAYS bad) If you look at the packet capture it will be filled with dhcpv6 requests if this is what is happening. Right now, I have a box dropping nearly every other packet for some reason. It's not in a place I can easily get at until tomorrow. It's been up for 90+ days and only started doing this recently --- X.Y.Z.Q ping statistics --- 60 packets transmitted, 42 packets received, 30.0% packet loss round-trip min/avg/max/stddev =3D 37.788/44.205/76.607/6.609 ms It's my hope it's the above problem and is occurring now that comcast is rolling out ipv6 Off the top of my head I don't remember what you need to disable to turn it off. Certainly comment out the ge01 entry to turn it off. 2) Random number generation has changed. rngd is still enabled, so we're not running out of random numbers, but we could have other problems... check entropy? 3) There could be a daemon running away (run top) 4) Could have a new instruction trap problem under certain conditions take a look at the /sys dmesg logead Tony --=20 Dave T=E4ht