From owner-freebsd-net@freebsd.org Thu Apr 28 19:03:00 2016 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9ECCCB1F467 for ; Thu, 28 Apr 2016 19:03:00 +0000 (UTC) (envelope-from bazzoola@gmail.com) Received: from mail-pa0-x242.google.com (mail-pa0-x242.google.com [IPv6:2607:f8b0:400e:c03::242]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 71B6C1F24; Thu, 28 Apr 2016 19:03:00 +0000 (UTC) (envelope-from bazzoola@gmail.com) Received: by mail-pa0-x242.google.com with SMTP id vv3so11771528pab.0; Thu, 28 Apr 2016 12:03:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-transfer-encoding; bh=0zEQUhbHS0B7KlxmpQ/fA13wimT/dRnaOkHBhFpQPRQ=; b=Rp3MHjROKlPwWYJJelxHx0PeIOPghOwfnjd1GwfcQXqJWi53IBUfUT5gZ6UhxBMZLE 8uM05wKOwfGRDCDFxNH1lQ3Xni9JiX/zRYwN2aU7Oa0bt3a5HN8HJZeTGFbX11WylbCD FePBpV+RBTYcNN7I1+L3HtW3oBU+J5xz221bDrl3+xjG7/hLRYFQXOh+dEXtUFtWPDXD JOlD19Fa7+OCrTpGyVelReOKcVibPxL7Uq1jog1Nu1l1xCz1RwwZcytWSHmW3Awu7FdO +m7/BVe4Xo3UEzKHXj6SzMan7udBMZ8wvlLs37JWemHrHCueO5GsFz2nOdW6FjKErY+w WxTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=0zEQUhbHS0B7KlxmpQ/fA13wimT/dRnaOkHBhFpQPRQ=; b=kBhxhXTfzu3P3XQfZ09zNDMCfY5r7RzgE4/5JY4OFDsYJfh/RPXYNy9PW6Wct3CFZB MHEyj9a89tx9HUQnAZTruA15SJLbCaPmrfKNSIOj5iPmu3sy8BK4+hjQVsw9bfIK+U7b m4CxRhRlVhnSangW6/TZ5rX5DL+xXiASSVs9XHfkE3TUnFAlodDLJ54RiTrkiwuT+RhF jwA2mCVS3TQiykbde11QAF29zQyatvcoz+h2IoK7RT9oqHMhm3mQ6DdaoctPSNcmjgFJ i0jPH+7uiuhGuwJdSfxQwgyQDw4L5foSg2PFaup3LIDy8AbBihSXBqHF1hUmS0elIrqY h7zg== X-Gm-Message-State: AOPr4FWjV3gyXUFp+MXpLcOwUO+ecrZNOAyv7ifesFEi+Jfk8CxdxT7PcMEVzmG2xF/QZw== X-Received: by 10.66.180.111 with SMTP id dn15mr22604462pac.69.1461870180146; Thu, 28 Apr 2016 12:03:00 -0700 (PDT) Received: from ?IPv6:2620:83:8001:24::1:567? ([2620:83:8001:24::1:567]) by smtp.googlemail.com with ESMTPSA id d186sm17004808pfa.45.2016.04.28.12.02.59 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 28 Apr 2016 12:02:59 -0700 (PDT) Subject: Re: netmap overrun counters To: Navdeep Parhar , freebsd-net@freebsd.org References: <9fd88731-2cdf-a6da-4b4e-f97bb120696a@FreeBSD.org> From: bazzoola Message-ID: <863506de-870e-0da4-81d3-6ab537feaa2b@gmail.com> Date: Thu, 28 Apr 2016 12:02:58 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0 MIME-Version: 1.0 In-Reply-To: <9fd88731-2cdf-a6da-4b4e-f97bb120696a@FreeBSD.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Apr 2016 19:03:00 -0000 On 04/28/2016 11:35 AM, Navdeep Parhar wrote: > On 04/28/2016 11:13, bazzoola wrote: >> Hi! >> >> Two questions: >> >> (1) Is there a way to know when netmap rx rings overrun? Most NIC >> drivers provide MPC (missed packet count) and sysctl for rx_overrun. >> >> I would like to know if my application is not reading as fast, i.e., no >> frames are being dropped. > > A NIC's hardware counters don't distinguish between netmap or normal > operation so you can monitor the existing sysctls for rx drops/overruns. > > Regards, > Navdeep > Navdeep, I am not asking about NIC's ring overrun. As you know netmap has its own rings. Is there a way to know if netmap's rx ring overrun? Thanks for your input.