From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id D067BE0082A; Sat, 4 Feb 2017 05:38:26 -0800 (PST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HTML_MESSAGE, RCVD_IN_DNSWL_NONE, RCVD_IN_SORBS_SPAM autolearn=no version=3.3.1 X-Spam-HAM-Report: * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 0.0 HTML_MESSAGE BODY: HTML included in message * 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily * valid * -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature * -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no * trust * [209.85.220.177 listed in list.dnswl.org] * 0.5 RCVD_IN_SORBS_SPAM RBL: SORBS: sender is a spam source * [209.85.220.177 listed in dnsbl.sorbs.net] Received: from mail-qk0-f177.google.com (mail-qk0-f177.google.com [209.85.220.177]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id 88C99E007C2 for ; Sat, 4 Feb 2017 05:38:24 -0800 (PST) Received: by mail-qk0-f177.google.com with SMTP id u25so16836505qki.2 for ; Sat, 04 Feb 2017 05:38:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel-com.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=8z561v6KtoBe++xo7cn3FuA269lSohxSHZhYkJ4yAtA=; b=avmU24VsMGZqkhmXV8fo/AJcxMzqZSd2VqYK+981cZg4msOY2lydpA4TGBadTqvFSW UW0m/LDMdaCQv8QAVwTFJs4liL3zFPw05sK23MGFpV6IwXIMh0Lf6TdEc0qL40AuDSMd g0718FNd9fk83zUkvNNa6rVpKLI1wfee8gdfmhfA5ziB4ANwmygruXJzX0qy37vCqv4k i87Ey7WEBBF8QLhBvaUaYaykgB3mzUQiquC3mqmO1Vexbmuy9+KE8ZyPkTnfLpLTa0FJ YPc8meVX/ZnFMpKDCq+l5WZr96I6GO35y0q4fHVsX5lm0eoaTMrAfXmR/0JZbPHyXfo6 F63g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=8z561v6KtoBe++xo7cn3FuA269lSohxSHZhYkJ4yAtA=; b=hXd9d/riKzXfMk9ze8VWsWthlKTFz0wFgacxf6Bc5ANXnCCFSqRyeZSzE1COby0Vpw 6OM2q3sJ2M0wnQl55orBbxfekumNNnJNdvZ/H0evWFmSwrCxQiychFphkDWlP6XuWuS9 DWVBhi7rryWFKrVrbsJO566N2LbvfZtljvRUDV10w+VvgEItoF2RNhOZr0cFFAjJmkOf E7jUBs68ldw3UYdn5G3hLU7acG1KMsde+dIh2JDjT7YpmQs6t4hAMivZ8lDccPNKWHUN WLmyeZcLNUA0CRRLZ8G2qLeU1Z03vIDh+C7IAMDkrYjLPgQP5UkXuWV++hUZwRk0qwPQ wZMA== X-Gm-Message-State: AMke39lbSY5saD+PvHIUAXdNbn4GazeG9k9+0TegRIgy9LngHTEqeeMZhs0QNlMhqetPPNiTK0zLNUJLQyiOnsjZ X-Received: by 10.55.183.133 with SMTP id h127mr1995079qkf.121.1486215503578; Sat, 04 Feb 2017 05:38:23 -0800 (PST) MIME-Version: 1.0 Received: by 10.140.103.233 with HTTP; Sat, 4 Feb 2017 05:38:03 -0800 (PST) In-Reply-To: References: From: "Burton, Ross" Date: Sat, 4 Feb 2017 13:38:03 +0000 Message-ID: To: Takashi Matsuzawa Cc: "yocto@yoctoproject.org" Subject: Re: genericx86 vs qemux86 X-BeenThere: yocto@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Discussion of all things Yocto Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 04 Feb 2017 13:38:26 -0000 Content-Type: multipart/alternative; boundary=94eb2c0600562699980547b483c7 --94eb2c0600562699980547b483c7 Content-Type: text/plain; charset=UTF-8 On 4 February 2017 at 03:59, Takashi Matsuzawa wrote: > So, if virtualization platform provides what intel-core* builds expects, > then I will see a better performance with them, rather thatn qemu* builds. > Or qemu* builds provide particular features that suites well with VM, > other thna its 'safe' behavior? > The qemu machines enable all the 'virtio' drivers that for example instead of talking to a pretend model of a real ethernet board, talk directly to the container. This makes them much faster. The meta-intel machines enable various drivers and compiler options that are specific to or tailored for real modern x86 hardware, so will perform better than a lowest common denominator kernel build. Ross --94eb2c0600562699980547b483c7 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

= On 4 February 2017 at 03:59, Takashi Matsuzawa <tmatsuzawa@xevo.com&= gt; wrote:
So, if virtualizat= ion platform provides what intel-core* builds expects, then I will see a be= tter performance with them, rather thatn qemu* builds.
Or qemu* builds provide particular features that suites well with VM, = other thna its 'safe' behavior?

The qemu machines enable all the 'vir= tio' drivers that for example instead of talking to a pretend model of = a real ethernet board, talk directly to the container.=C2=A0 This makes the= m much faster.

The meta-intel machines enable various drivers and compiler option= s that are specific to or tailored for real modern x86 hardware, so will pe= rform better than a lowest common denominator kernel build.

Ross
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