From owner-freebsd-hackers@FreeBSD.ORG Sat Jun 5 00:43:35 2010 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A3D0E1065679 for ; Sat, 5 Jun 2010 00:43:35 +0000 (UTC) (envelope-from mozolevsky@gmail.com) Received: from mail-gw0-f54.google.com (mail-gw0-f54.google.com [74.125.83.54]) by mx1.freebsd.org (Postfix) with ESMTP id 3D1D38FC08 for ; Sat, 5 Jun 2010 00:43:34 +0000 (UTC) Received: by gwaa12 with SMTP id a12so132104gwa.13 for ; Fri, 04 Jun 2010 17:43:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:sender:received :in-reply-to:references:from:date:x-google-sender-auth:message-id :subject:to:cc:content-type; bh=dnfMTTudZMSHLIXjFDMyCOTiX7XxBeK4V4inaSB/h+8=; b=QNoqOJeLofy9yzfr3rOVvjwnxZcSG6QtqbwYYt+zKnGQ52SqJKx3XQwSqbUxZzxtOL vnvzJx6VJIkQ7otDi6faWxcH/SEc3qMH73OJ7YqCsD4EtyhvxR7dlTFOO0mG7gZdMrqD qiYmZHdqs+F2wyUdyljJDa65Pd6QZtTrrKqNo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type; b=gMOGVJ13guVBx2wMRLL/I7cnUXvW8nZv/Z31NfjSl2K3e0y8WvT0yYqKpFoIc8imLl DS/F0loXj9UUs6MmGHTXoWdXjH4whVUmq0vf2f3wdpAfI0nO3cNgBydwXNAm8KvwwKSb 1M9BuMcfK77BaBTnTdQjqvA3Jj5BFwS4DJGtI= Received: by 10.150.48.2 with SMTP id v2mr11057137ybv.173.1275698614119; Fri, 04 Jun 2010 17:43:34 -0700 (PDT) MIME-Version: 1.0 Sender: mozolevsky@gmail.com Received: by 10.151.84.11 with HTTP; Fri, 4 Jun 2010 17:43:14 -0700 (PDT) In-Reply-To: <4C09932B.6040808@wooh.hu> References: <4C09932B.6040808@wooh.hu> From: Igor Mozolevsky Date: Sat, 5 Jun 2010 01:43:14 +0100 X-Google-Sender-Auth: pKssWYACNvJkvYWrJACZ7WvDmng Message-ID: To: Adam PAPAI Content-Type: text/plain; charset=UTF-8 Cc: freebsd-hackers@freebsd.org, freebsd-questions@freebsd.org Subject: Re: sysbench / fileio - Linux vs. FreeBSD X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 05 Jun 2010 00:43:35 -0000 On 5 June 2010 00:58, Adam PAPAI wrote: > How can I tune my disk to make it faster? Is it possible? What is the > reason of the really slow I/O with more than 4 threads? What do you > recommend me to do? Why is it damn slow with 8K blocksize? Does linux still have async disk writes by default? Igor