From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f171.google.com (mail-wi0-f171.google.com [209.85.212.171]) by dpdk.org (Postfix) with ESMTP id DC6F958CB for ; Thu, 17 Sep 2015 22:28:31 +0200 (CEST) Received: by wicge5 with SMTP id ge5so6458799wic.0 for ; Thu, 17 Sep 2015 13:28:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-type:content-transfer-encoding; bh=7JNGU/YG5CiQAqDlmnq3Bgpgj29RqKpQfrITERYdCsE=; b=ELFr5L+4gNwoIfpQovg8Lq5Y7lOxqPjIhW9CXXFtWSKTgo7Kzz+T0pWxUL3Jdne6cf YK/Q08jYZQ5QeU2IVgHkhZGrRKk2ivTcATeQNlGTrKL/q6N3hL0sJSJ1Xg2l1aaMjOah /2F3r9J0FSrNbGG+aOQZcp4ZQIS6t/HiHKizzPetGbiu7XMTbqVy+fShYaoYPMphFn4C CmymCS66bx3KC+in6VSHkVdUFOwvF/WhJh8/yHUBd2YRrj42dN55gqiqjWJ0EVkfunJQ 4IyWdeH2vy09+Jza4Lkl30ubhp6uOLCb5ZITuv8WOFOzG9JqQIIsGoAD39kDj9ZdIo2J CIPw== X-Gm-Message-State: ALoCoQk+Jz5GcB0hQIG7phjF68e5u5upBKlne+WgmOXWxAwHPhY+5sjPKU1VjzSLCh1QtMifYSom X-Received: by 10.180.99.66 with SMTP id eo2mr34333394wib.88.1442521711684; Thu, 17 Sep 2015 13:28:31 -0700 (PDT) Received: from [192.168.0.101] ([90.152.119.35]) by smtp.googlemail.com with ESMTPSA id r9sm5156724wjz.35.2015.09.17.13.28.31 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 17 Sep 2015 13:28:31 -0700 (PDT) To: dev@dpdk.org, konstantin.ananyev@intel.com, "Richardson, Bruce" From: Zoltan Kiss Message-ID: <55FB226F.2040707@linaro.org> Date: Thu, 17 Sep 2015 21:28:31 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Subject: [dpdk-dev] ixgbe vPMD question 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: Thu, 17 Sep 2015 20:28:32 -0000 Hi, The recv function does a prefetch on cacheline1, however it seems to me that rx_pkts[pos] should be uninitialized pointer at that time: http://dpdk.org/browse/dpdk/tree/drivers/net/ixgbe/ixgbe_rxtx_vec.c#n287 So I guess it prefetches only random value. Or am I missing something? Regards, Zoltan