From owner-freebsd-hackers@FreeBSD.ORG Sun Dec 9 04:08:13 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D1CC0C64 for ; Sun, 9 Dec 2012 04:08:13 +0000 (UTC) (envelope-from lists@eitanadler.com) Received: from mail-vb0-f54.google.com (mail-vb0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id 7935C8FC12 for ; Sun, 9 Dec 2012 04:08:13 +0000 (UTC) Received: by mail-vb0-f54.google.com with SMTP id l1so2049005vba.13 for ; Sat, 08 Dec 2012 20:08:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eitanadler.com; s=0xdeadbeef; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=2yKq6dW8Ah2pt4wkNXuruV6DVPYtfo3r1/WHgG+ttWE=; b=k81D4fSqosqqnGbZGS507h2MgLjAmnvZi8KFPndfMbXHqv9sAH7qj02AVRq36gI2U/ L2QJRbS+87TM1HJCLnPh5XFmX+Hoiiq8JNudwp5oca8phc8rx5bNC6/OkQ0b+sED+XuQ 5FmTNnch6REDV4VKrIolM9JINg4+eDP9znrn0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:x-gm-message-state; bh=2yKq6dW8Ah2pt4wkNXuruV6DVPYtfo3r1/WHgG+ttWE=; b=joWerqovGS4WJ8FD7t3ykrw9gZXbQ8Z4vF3C6EDmn/+tXgzLzjhXhlAH3t7uUGoHaR G7fY8R/SyBBVWeqSyS2cpDDNSBkWgN8jJGuXZsCgYiMybnoj2/m3qMXg5B8y6b/y0X0m l4HlrhxgRWgtSqWjPk5pR7p6F+Q635RnIIqQLY9RpFFwHIIYlpPM2mJT4/etMIRxRHf5 De5FT97Yr7cA4fxIbPcWhO5/BoGiLG3r7EEz4Bu3JCss2E6UGG6NzHuNLT3PirzqM6I0 afAZ9YWNQvCJvSLuZn7lvUXnzDpA5k8EkEPmXzUbQatSstKHHZGm6M/+znxVwlg+w0x4 wFzA== Received: by 10.58.252.72 with SMTP id zq8mr6881750vec.20.1355026091744; Sat, 08 Dec 2012 20:08:11 -0800 (PST) MIME-Version: 1.0 Received: by 10.220.113.137 with HTTP; Sat, 8 Dec 2012 20:07:40 -0800 (PST) In-Reply-To: <20121208230433.2c54f44a@kan.dyndns.org> References: <20121209014547.238070@gmx.com> <1830.1355025154@tristatelogic.com> <20121208230433.2c54f44a@kan.dyndns.org> From: Eitan Adler Date: Sat, 8 Dec 2012 23:07:40 -0500 Message-ID: Subject: Re: FreeBSD for serious performance? (was: Re: 9.x -- New Install -- serious partition misalignment) To: Alexander Kabaev Content-Type: text/plain; charset=UTF-8 X-Gm-Message-State: ALoCoQmuQs8hp2N2Gh08uf5e37EtRFiyfrMv65sKEQ8/cC7OZTUSJcJSS5eu5OBs0jDziy5Eh5v1 Cc: freebsd-hackers@freebsd.org, "Ronald F. Guilmette" X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Dec 2012 04:08:13 -0000 On 8 December 2012 23:04, Alexander Kabaev wrote: > On Sat, 08 Dec 2012 19:52:34 -0800 > "Ronald F. Guilmette" wrote: > > "analysis" skipped. > >> >> As regards to the Native Command Queuing.... all I can say is "Crap!" >> I wasn't aware...until now... that FreeBSD did not support that. That >> really is a rather entirely serious issue. But I do think that the >> performance hit from that would be dwarfed by the performance hit that >> could be caused by the AF misaligment problem. >From my memory, if you use ahci(4) instead of the old ata(4) you have NCQ. If you still use ata(4), you don't. -- Eitan Adler