From owner-svn-src-head@FreeBSD.ORG Wed Mar 16 19:59:49 2011 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3265A106566C; Wed, 16 Mar 2011 19:59:49 +0000 (UTC) (envelope-from yanegomi@gmail.com) Received: from mail-ww0-f50.google.com (mail-ww0-f50.google.com [74.125.82.50]) by mx1.freebsd.org (Postfix) with ESMTP id 1810C8FC1B; Wed, 16 Mar 2011 19:59:47 +0000 (UTC) Received: by wwc33 with SMTP id 33so2625572wwc.31 for ; Wed, 16 Mar 2011 12:59:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=3uVumxORSchnB98ztIyVwgda59Gt/mlXw/0P9k4QCVc=; b=qt0eqhrFSeJjhizFTQMIQCAPMAHM4W72LlrlxSZpDvwzDcDmmchMWD62DHX2dXWQAl XuJl2qtf8O5Hbeacn+TsQmLuZuLaIBuuyTgTi7wB4tRjvHzwviUaVGVL6Q3xJapUNEZK GYjfMbmj/35MBH24qGRmpascGK70qouo7W1R4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=B1fv4mYP+RdH8jNLAQaEWJRHCHkNpeuZp6G1Z7QKgj/JtDRJ6UM+/KjMtV/rjmN+Hl GfSl0x2Gfy0OV/9gcBwhUDlOPenAzy/hqs8Zcg8HvSAssFC7OKtl04LXm/QSLz/NICiL jNtstpVw9gIr9m5oeeircfxg+LxPn6wD77i1k= MIME-Version: 1.0 Received: by 10.216.191.208 with SMTP id g58mr362281wen.85.1300305586542; Wed, 16 Mar 2011 12:59:46 -0700 (PDT) Sender: yanegomi@gmail.com Received: by 10.216.173.142 with HTTP; Wed, 16 Mar 2011 12:59:46 -0700 (PDT) In-Reply-To: References: <201103161622.p2GGMxNp097642@svn.freebsd.org> <20110316174642.GB6367@freebsd.org> Date: Wed, 16 Mar 2011 12:59:46 -0700 X-Google-Sender-Auth: vrCDoAlhkBo1kTZWSTMA_YBN9qo Message-ID: From: Garrett Cooper To: Ivan Voras Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: svn-src-head@freebsd.org, Roman Divacky , src-committers@freebsd.org, svn-src-all@freebsd.org Subject: Re: svn commit: r219699 - head/sys/kern X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Mar 2011 19:59:49 -0000 On Wed, Mar 16, 2011 at 12:51 PM, Ivan Voras wrote: > On 16 March 2011 18:46, Roman Divacky wrote: >> >> On Wed, Mar 16, 2011 at 04:22:59PM +0000, Ivan Voras wrote: >> > Author: ivoras >> > Date: Wed Mar 16 16:22:59 2011 >> > New Revision: 219699 >> > URL: http://svn.freebsd.org/changeset/base/219699 >> > >> > Log: >> > =A0 The hardware has caught up; improvements are now observed even at = 128, >> > =A0 but stay conservative and bump read_max to "only" 64 (it will prob= ably be >> > =A0 a good idea to increase this to 128 after the next major release). >> >> how did you measure this? > > Specifically for this commit: my desktop 2xSATA 7200 RPM drives, > gmirror, single read "dd" stream, bs=3D1m. (Are there any ready read > multi-stream read tests which are not trivial i.e. they start from > different positions in the file?) Would be interesting to see how well things work with the new geom_raid bits and with other drives (SAS, SCSI). Thanks, -Garrett