From owner-cvs-src-old@FreeBSD.ORG Mon Aug 9 22:56:19 2010 Return-Path: Delivered-To: cvs-src-old@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 38AAA106567B for ; Mon, 9 Aug 2010 22:56:19 +0000 (UTC) (envelope-from ivoras@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [IPv6:2001:4f8:fff6::29]) by mx1.freebsd.org (Postfix) with ESMTP id B8A7A8FC1A for ; Mon, 9 Aug 2010 22:56:18 +0000 (UTC) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.14.4/8.14.4) with ESMTP id o79MuIKu027873 for ; Mon, 9 Aug 2010 22:56:18 GMT (envelope-from ivoras@repoman.freebsd.org) Received: (from svn2cvs@localhost) by repoman.freebsd.org (8.14.4/8.14.4/Submit) id o79MuI7M027871 for cvs-src-old@freebsd.org; Mon, 9 Aug 2010 22:56:18 GMT (envelope-from ivoras@repoman.freebsd.org) Message-Id: <201008092256.o79MuI7M027871@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to ivoras@repoman.freebsd.org using -f From: Ivan Voras Date: Mon, 9 Aug 2010 22:56:10 +0000 (UTC) To: cvs-src-old@freebsd.org X-FreeBSD-CVS-Branch: HEAD Subject: cvs commit: src/sys/kern vfs_cluster.c X-BeenThere: cvs-src-old@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: **OBSOLETE** CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Aug 2010 22:56:19 -0000 ivoras 2010-08-09 22:56:10 UTC FreeBSD src repository Modified files: sys/kern vfs_cluster.c Log: SVN rev 211126 on 2010-08-09 22:56:10Z by ivoras Bumping the read-ahead count once more, to value equivalent to 512 KiB on most system, based on benchmark results on a low-end fibre channel SAN under VMWare: vfs.read_max read performance 8 (historical default) 83 MB/s 16 (recent bump) 131 MB/s 32 (this version) 152 MB/s 64 157 MB/s (results are +/- 3 MB/s) As read-ahead is heuristic, based on past IO requests, it shouldn't be problematic. The new default is still smaller then in other OSes. Revision Changes Path 1.182 +1 -1 src/sys/kern/vfs_cluster.c