From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-x22d.google.com (mail-pa0-x22d.google.com [IPv6:2607:f8b0:400e:c03::22d]) by dpdk.org (Postfix) with ESMTP id F41A0232 for ; Wed, 19 Jun 2013 16:57:11 +0200 (CEST) Received: by mail-pa0-f45.google.com with SMTP id bi5so5255088pad.18 for ; Wed, 19 Jun 2013 07:57:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=date:from:to:cc:subject:message-id:in-reply-to:references:x-mailer :mime-version:content-type:content-transfer-encoding :x-gm-message-state; bh=X37K3yt1hPwTlhp6aKv6MJOi1GIG5CZqgy+oeg7kiE4=; b=hk1glBMaoH0Dw+owGLTN0Ozd1epqUq21EAEg3Eh0IdM66iMItTRbdz9FMliTYydecc 9rs659WUdxrEQdEQusorQmbNZdsm1Sj1bl+XmXDRAewVCqQTBmVhGhHz0eaUmFTyQ5AF rT10tdRWLHHEJJ5pbb/3GQ0wp7nRxAj1CYS8p+yOQFc+Wb8j6ZDGkwX/fwTM3W2iFnLN ZmJtpN+XuluQeFC/PuE1aOybShyBmXwq4DLelwO6ch7Kq3EGujCrLYEKrkfBf1nPOPaE EWmatI8IaTLXGD6P0CU6l34EPLzT1DljSjdBfpyEPefMc9ufjJui4rJP/tAmjiCp71ZE +nJw== X-Received: by 10.66.100.231 with SMTP id fb7mr6952293pab.162.1371653842882; Wed, 19 Jun 2013 07:57:22 -0700 (PDT) Received: from nehalam.linuxnetplumber.net (static-50-53-71-109.bvtn.or.frontiernet.net. [50.53.71.109]) by mx.google.com with ESMTPSA id at1sm23470345pbc.10.2013.06.19.07.57.21 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 19 Jun 2013 07:57:22 -0700 (PDT) Date: Wed, 19 Jun 2013 07:57:17 -0700 From: Stephen Hemminger To: =?utf-8?B?SmlhLlN1aQ==?=(=?utf-8?B?6LS+552i?=) Message-ID: <20130619075717.18a099fb@nehalam.linuxnetplumber.net> In-Reply-To: <581E2E1085FAEF45B48CF8A139824CF804E5D6D419@ACNMAIL1.ACN.ADVANTECH.CORP> References: <51C16BA7.4060001@iki.fi> <581E2E1085FAEF45B48CF8A139824CF804E5D6D419@ACNMAIL1.ACN.ADVANTECH.CORP> X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.10; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Gm-Message-State: ALoCoQlpTisiO/JVw8IsDpuvW6Ecg3PI3mvmsuO+r6S5CCsgnPCw2RCwxNRxy3acySS/j930tFD5 Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] DPDK on bare-metal machine 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: Wed, 19 Jun 2013 14:57:12 -0000 With latest (3.9 or later) kernels the overhead from Linux kernel is minimal and shrinking fast. The only overhead left is the timer tick and that is being eliminated. Of course it is easy to write slow code and use system calls and defeat the purpose of DPDK. Has anyone experimented with making the DPDK threads marked as real-time to keep other processes away?