From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ve0-f169.google.com (mail-ve0-f169.google.com [209.85.128.169]) by dpdk.org (Postfix) with ESMTP id B432E333 for ; Tue, 1 Jul 2014 14:36:22 +0200 (CEST) Received: by mail-ve0-f169.google.com with SMTP id pa12so9669601veb.28 for ; Tue, 01 Jul 2014 05:36:42 -0700 (PDT) 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:content-type; bh=1loWulH0Touff+b9bpik+lntc2Pcrlfd3kXrkibcw4s=; b=OIU8GsVvb4UofdITmNn6T2lVSHCn2YHBPSxtEXNRO/o3musddIc5Zo8SyjUOHCNzEj AYf1eHuuS0MXTWcs/DbFkBm5b0bHiH2H7gfxf5EepEcQoUBGOAvGWKGAcGTGa2mP9VTG gDGmJ/izxZiigZZzku9X+WQkmI60B1/qKaze8N9qns0fTui0L1QlkkVU26F7VRIC1yKF RjfdG3lRAfCLVxqm6LE0rsZMGGygJjZiOOXqxTUx6kBqimWQjt08uqEFi8N3v6HtaSy6 UTWXd55tm2dHX7Yvtsm6iwIpvRH9DfwBfMppCnpGvHMD8vq1mGn1S5uPcWBGJI189sqZ E4rQ== X-Gm-Message-State: ALoCoQk4/fyksXBo4ZSXoMI1nHw9qtGkWtZMXB7iLE8s4ivXa76uD57FlachsXewwmjoi//3h536 MIME-Version: 1.0 X-Received: by 10.52.242.104 with SMTP id wp8mr5445161vdc.31.1404218202391; Tue, 01 Jul 2014 05:36:42 -0700 (PDT) Received: by 10.58.3.98 with HTTP; Tue, 1 Jul 2014 05:36:42 -0700 (PDT) In-Reply-To: References: Date: Tue, 1 Jul 2014 07:36:42 -0500 Message-ID: From: Matt Laswell To: "dev@dpdk.org" Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: Re: [dpdk-dev] Ability to/impact of running with smaller page sizes 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: Tue, 01 Jul 2014 12:36:23 -0000 Thanks everybody, It sounds as though what I'm looking for may be possible, especially with 1.7, but will require some tweaking and there will most definitely be a performance hit. That's great information. This is still just an experiment for us, and it's not at all guaranteed that I'm going to move towards smaller pages, but I very much appreciate the insights. -- Matt Laswell On Tue, Jul 1, 2014 at 6:51 AM, Burakov, Anatoly wrote: > Hi Matt, > > > I'm curious - is it possible in practical terms to run DPDK without > hugepages? > > Starting with release 1.7.0, support for VFIO was added, which allows > using DPDK without hugepages at al (including RX/TX rings) via the > --no-huge command-line parameter. Bear in mind though that you'll have to > have IOMMU/VT-d enabled (i.e. no VM support, only host-based) and also have > supported kernel version (3.6+) as well to use VFIO, the memory size will > be limited to 1G, and it won't work with multiprocess. I don't have any > performance figures on that unfortunately. > > Best regards, > Anatoly Burakov > DPDK SW Engineer >