From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-iy0-f171.google.com (mail-iy0-f171.google.com [209.85.210.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 138A7201756 for ; Mon, 20 Jun 2011 12:50:00 -0700 (PDT) Received: by iyi12 with SMTP id 12so4624844iyi.16 for ; Mon, 20 Jun 2011 13:16:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=7070PiT3w1Y3u55yXLGwPlvKgTZ6ab9cOAtkV6ofnY4=; b=UR5UrA9Dk7mgfYtYSO2E1HVz/rUockdbYrIKIB6o5Sy2fprAwFWmcs396JbAolpE1C kFpE+9jHwZyT5RCmVjUHYNtoi6P0m8nDwmZAy9GaUbuHSdsZjR4/gizb9XCSs+sm/zle SZgAeH4qMrq5KrY8pAPWw9eFezmgrn05X0b0k= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=mjKa/FrNytOhJwxMV8trSRowqUbLYAHAXPPbWL6DMg9uCX0IofxewBR0c7F2G0Hdve V54fsKC5vwQJQk0/5rtVqRiYNrHbIYLUnP1SBUZIjxRbCEBI1bxks1efqZsAlDzI5qyi cN6IaSO/Jx+6iPdCBzXpN6ci1cSUDEOqmyFJo= MIME-Version: 1.0 Received: by 10.231.74.84 with SMTP id t20mr5536306ibj.38.1308600973684; Mon, 20 Jun 2011 13:16:13 -0700 (PDT) Received: by 10.231.13.76 with HTTP; Mon, 20 Jun 2011 13:16:13 -0700 (PDT) In-Reply-To: References: Date: Mon, 20 Jun 2011 14:16:13 -0600 Message-ID: Subject: Re: Dropwatch From: Dave Taht To: Justin McCann Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: bloat X-BeenThere: bloat-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Developers working on AQM, device drivers, and networking stacks" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Jun 2011 19:50:00 -0000 On Mon, Jun 20, 2011 at 1:54 PM, Justin McCann wrote: > I hadn't seen this mentioned here, so maybe I'm not the only one who > didn't know about it.... I had just got to where net_drop_monitor is configured in the debloat-testing kernel, and I think I had got it into cerowrt last week (but need to check)... > > I just stumbled across Neil Horman's dropwatch [1], which=A0uses Netlink > to report which parts of the kernel are dropping packets. It looks > like the patches made it into the kernel in 2009 [2], and the utility > is in RHEL 5.6 [3], maybe earlier. The version I tried just reports > the kernel addresses and doesn't look up the function names directly. And was casting about for a pre-existing tool to use that functionality because writing netlink code is a hairy exercise.... seeing what is dropped and why would be very good, at this point. Thanks for spotting this. It didn't compile on the first try, but perhaps with some fiddling.... > > Enjoy, > =A0 =A0Justin > > > > [1] https://fedorahosted.org/dropwatch/ > [2] http://kerneltrap.org/mailarchive/linux-netdev/2009/3/3/5038664/threa= d > [3] http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.6= _Release_Notes/ar01s03.html > _______________________________________________ > Bloat-devel mailing list > Bloat-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat-devel > --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://the-edge.blogspot.com