From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f182.google.com (mail-io0-f182.google.com [209.85.223.182]) by dpdk.org (Postfix) with ESMTP id 55DF1ADD0 for ; Fri, 20 May 2016 11:09:03 +0200 (CEST) Received: by mail-io0-f182.google.com with SMTP id 190so138814449iow.1 for ; Fri, 20 May 2016 02:09:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to; bh=dxdkY3VdZjlaaY/haPruh/LfRti7ikg/PP4+38On+NI=; b=Yi4mVWTIURy6neZ3OVWo2rv+2EF5DFYHG/WW5eIHRO/nK4jOdLpR72F5zzX60O3glw 7UvyUyUHfCjK4egdJZuBJVfLycYCH0yOJJ/L6Y9wXB7VqdPIidEIyknS2dqkJt4C/It7 4JPp6MeFTB0BdlP6rbw9vWEiaF/PYM10+dcBxC1wVh2Ypi99fSFUJQRqOba5nDWuks0i PPTER8DH0KNScfLWLSSceOSqrPyp6fbgPh6aH5uZ02W77kgw7jn4cV07ATEtieMh3aCH ZSsXP4mAc3R+OkM4ZJezzD+MMwGo4eohB1TaTLkYtRB8EHH0YaCm9q6WI7dNDIWosmBG nXIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=dxdkY3VdZjlaaY/haPruh/LfRti7ikg/PP4+38On+NI=; b=TRqU4jiNIi7DSmdvsD97dsrSw0VoU5T8vPNtB20pU2dgr2C8Bdw7Us/RvIsxy8Biyj 93vXhK+Iph3gkifR2Y/eGodtMCt3H9WxLZ/sgWC/+2+CWDp6gza2MDZjNxErSxffSeqo yqkTGWY+4EmvMb8EYey/f3pYJYRYkEDzBHmaMzpnBDRMCfMXwULD3dkEF8q/a7nTiJG9 XOkzAFqj+O5QedQWhT9TBb/ewh1JC3F7fvyzFHYdwPJAtJM4Sd0q2zMb18MV/6bhrPJn whcc+zMGAjD9MoD5SU+iZVaeuhDQEh0BUJZALv0nfHdaFSNeAVpbbT4+BdNzk+wDqzmQ 8QTg== X-Gm-Message-State: AOPr4FWtmD5PNpFiRCi7ssZnMAmCiPnbxlPTWA2VWYxZ2NQ11F+/t/GkRjxBUl6YQF3uR+cg3u5EezTfv0tpnA== MIME-Version: 1.0 X-Received: by 10.36.103.19 with SMTP id u19mr1798012itc.8.1463735342779; Fri, 20 May 2016 02:09:02 -0700 (PDT) Received: by 10.107.142.211 with HTTP; Fri, 20 May 2016 02:09:02 -0700 (PDT) Date: Fri, 20 May 2016 02:09:02 -0700 Message-ID: From: SwamZ To: dev@dpdk.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-dev] Rx_missed_errors drops with larger packet size X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 May 2016 09:09:03 -0000 Hi, While doing performance testing with larger packet size (like 4000 bytes), we are seeing rx_missed_errors on the interface. This issue is not seen with packet size less than 2000. There were questions asked in this forum on rx_missed_error, but there was not any conclusion. Please let me know what could be the reason for these drops. I tried the following without any luck: 1) Tried different burst size like 16, 32 an 64 2) Tried different number of the rx descriptors like 512, 1024, 2048 and 4096. Setup and testing details: CPU Speed : 2.6 GHz NIC : 82599ES 10-Gigabit IO Virtualization: SR-IOV IO and packet processing cores are in the same NUMA. Packet size : 4000 bytes Traffic rate: 80 % line rate. If the traffic rate is < ~80% then drops are not seen. Application: This is a sample application developed using L3fwd example app. DPDK version: 1.7 Thanks, Swamy