From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yx0-f171.google.com (mail-yx0-f171.google.com [209.85.213.171]) (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 8F31A201752 for ; Mon, 20 Jun 2011 12:28:13 -0700 (PDT) Received: by yxh35 with SMTP id 35so3087823yxh.16 for ; Mon, 20 Jun 2011 12:54:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=LubqEX2EnxgNSmEFk1xi0/SYBwVZBAnFAHCzk83DHDo=; b=n1Lf34PnzPAdrPsUxkL0m3IH2QKJCMsNLwRqdchyaNj373KF0KQGmTkJEiY39zgMu/ ZADH35sArfpphsRR1loEuuWLonG9H4YTURjsh3LIc00Vj0sPhZC5szlAy5tlEk+xLFtW 0Fu8s6bJbvyzq5BlQ0qK9mWFuBqGDEes5Y9sk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=O7lGwJhppj2hi9z5ZvwjTZlKYBC6hqwDtCRooLQseQTdABGW60Sv6EnZTPxhXdwNH7 n2aufJczLBqtILdIpSWbp9kfQmd5c+zfuwa1viD1Wi5SONcfc4b4cpfHS4kbA/IRl3Pe LfWP0WkF+Zz+mfcnU2q/bOrHkR6xHeWEY/ucE= MIME-Version: 1.0 Received: by 10.236.195.71 with SMTP id o47mr8968159yhn.104.1308599666561; Mon, 20 Jun 2011 12:54:26 -0700 (PDT) Received: by 10.147.34.13 with HTTP; Mon, 20 Jun 2011 12:54:26 -0700 (PDT) Date: Mon, 20 Jun 2011 15:54:26 -0400 Message-ID: Subject: Dropwatch From: Justin McCann To: bloat Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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 19:28:13 -0000 I hadn't seen this mentioned here, so maybe I'm not the only one who didn't know about it.... 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. Enjoy, Justin [1] https://fedorahosted.org/dropwatch/ [2] http://kerneltrap.org/mailarchive/linux-netdev/2009/3/3/5038664/thread [3] http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.6_R= elease_Notes/ar01s03.html