From owner-freebsd-hackers@FreeBSD.ORG Tue Feb 28 22:03:13 2012 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 A1517106566B; Tue, 28 Feb 2012 22:03:13 +0000 (UTC) (envelope-from root@tensor.gdynia.pl) Received: from tensor.gdynia.pl (tensor.gdynia.pl [89.206.35.72]) by mx1.freebsd.org (Postfix) with ESMTP id EEE198FC18; Tue, 28 Feb 2012 22:03:12 +0000 (UTC) Received: Received: from 127.0.0.1 (localhost [127.0.0.1]) by tensor.gdynia.pl (8.14.4/8.14.5) with ESMTP id q1SLR5Vl035871; Tue, 28 Feb 2012 22:27:05 +0100 (CET) (envelope-from root@tensor.gdynia.pl) Received: (from root@localhost) by tensor.gdynia.pl (8.14.5/8.14.5/Submit) id q1SLR54V035870; Tue, 28 Feb 2012 22:27:05 +0100 (CET) (envelope-from root) Newsgroups: Date: Tue, 28 Feb 2012 22:06:12 +0100 (CET) From: Wojciech Puchar To: Artem Belevich Fcc: sent-mail In-Reply-To: Message-ID: References: <4F4C0726.6010804@FreeBSD.org> <4F4CAAC1.9060908@FreeBSD.org> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) X-Reply-UID: (2 > )(1 1330463121 54)/home/wojtek/Maildir/FreeBSD-hackers X-Reply-Mbox: #md/Maildir/FreeBSD-hackers X-Cursor-Pos: : 397 MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="2456600518-547007317-1330463172=:32088" Status: X-Status: X-Keywords: X-UID: 1 X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.2.6 (tensor.gdynia.pl [89.206.35.72]); Tue, 28 Feb 2012 22:27:06 +0100 (CET) Cc: freebsd-hackers@freebsd.org, Grzegorz Kulewski , Andriy Gapon Subject: Re: improving VM - questions 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: Tue, 28 Feb 2012 22:03:13 -0000 --2456600518-547007317-1330463172=:32088 Content-Type: TEXT/PLAIN; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE >>> right. but still 32 pages is 128kB, but i see 64kB I/Os in systat/vmsta= t >> >> Right, but the comment says to not define MAX_PAGEOUT_CLUSTER to a value= greater >> than 32, but you did that. =C2=A0So all bets could be off unless you exa= mined the >> code and know exactly what should happen in this case. > > I suspect it might be DFLTPHYS that splits disk i/o into 64K blocks on > the driver level. can i increase DFLTPHYS as well as i did with MAXPHYS without problems? --2456600518-547007317-1330463172=:32088--