From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f54.google.com (mail-wm0-f54.google.com [74.125.82.54]) by dpdk.org (Postfix) with ESMTP id 1056B2B8C for ; Mon, 4 Jul 2016 19:34:42 +0200 (CEST) Received: by mail-wm0-f54.google.com with SMTP id z126so49426745wme.0 for ; Mon, 04 Jul 2016 10:34:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc; bh=DtMoR0G//oszRQAPWOLjWFQp465OajFC9ypRv/JvVvY=; b=tNUyrWUvg3DfPmX6+G42gJqYEtZJBKz31SoFApSdtZGrnM5kOroI5j4U8K4i392ENo VWyOg3vqdsFm2XmFteGvCclyEJXBIV3deD6FlyLymniA9Rg2pDJEJJdJlp6ZASjntyRR NxlsLJiid0H5qcG0U+2aqj8FYAFI57n/Act7MCKI28HrQlvfjbtMMbvKkWPEiSszDVHs Jrcn3kKe8e3/MNbaxDHrsckSsGMxcKZi8psMaf52kdva4kPmBkXt34x4N7651PtjNIFg Kblzy9wV6PPvhmxWQ3PDtOhCKwOcy+DvPzxmVmY+ctomHs/LhX2YjT7Rv3TlNroPIiTh SciQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc; bh=DtMoR0G//oszRQAPWOLjWFQp465OajFC9ypRv/JvVvY=; b=MRn4sw6V+bAoNuJ9BTXA3UoNjIOgW7JXe4eN5ofS1Vt/goPUAeHCctFJuM3K5ZGwEn 7h9djE4zL1c59YPt2MNbGIUm0wPMr+WCcs0W7jGiY2EtYSzcNC6WbwCE9ozPIt2TDbfv ndaWr6+w++yzEF843K3GvAKKGK3RBSWSYkHijGuk04TfmgCz6zAV7e9AQnYkzD/5OnK+ XIKOQ5Id+gLAGiFSDk2e6KvjI8O65tolqkS3C0+BtvC5r6YHhcOM5jHhyT3+3sS+UEL0 MmopYt35iS7cAggDHlTwIFLU2S6x/XLrefyyHZMACarXxqw/I570SiSMbIWH1Z7dtsAw AkMg== X-Gm-Message-State: ALyK8tLT/3ZZ4pi9cO4F2k7xjYBuVIhfnX9WTOAfV5hIpUu5VRxda2/JwQLp/o/Puzxqb5o47qUIqWNcrNp3eg== MIME-Version: 1.0 X-Received: by 10.194.88.5 with SMTP id bc5mr12519038wjb.100.1467653681871; Mon, 04 Jul 2016 10:34:41 -0700 (PDT) Received: by 10.28.56.3 with HTTP; Mon, 4 Jul 2016 10:34:41 -0700 (PDT) Received: by 10.28.56.3 with HTTP; Mon, 4 Jul 2016 10:34:41 -0700 (PDT) In-Reply-To: References: Date: Mon, 4 Jul 2016 22:34:41 +0500 Message-ID: From: Muhammad Zain-ul-Abideen To: Sepehr Nazary Cc: users@dpdk.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: Re: [dpdk-users] multi core performance problem X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jul 2016 17:34:42 -0000 I am no expert with memory bandwidth and hardware acceleration. But what i can infer from this issue is that 1 of 2 things 1. Either QPI is being used and the maximum bandwidth is achieved 2. Or RAM has reached it's maximum bandwidth and this is the reason the higher orders core are getting more bandwidth then lower order But keith, and Thomas can tell you more on this subject