From owner-cvs-src@FreeBSD.ORG Wed Apr 2 07:04:50 2008 Return-Path: Delivered-To: cvs-src@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 269981065670; Wed, 2 Apr 2008 07:04:50 +0000 (UTC) (envelope-from jroberson@chesapeake.net) Received: from webaccess-cl.virtdom.com (webaccess-cl.virtdom.com [216.240.101.25]) by mx1.freebsd.org (Postfix) with ESMTP id DF7D68FC1B; Wed, 2 Apr 2008 07:04:49 +0000 (UTC) (envelope-from jroberson@chesapeake.net) Received: from [10.0.1.200] (cpe-24-94-72-120.hawaii.res.rr.com [24.94.72.120]) (authenticated bits=0) by webaccess-cl.virtdom.com (8.13.6/8.13.6) with ESMTP id m3274gYn006881; Wed, 2 Apr 2008 03:04:43 -0400 (EDT) (envelope-from jroberson@chesapeake.net) Date: Tue, 1 Apr 2008 21:05:57 -1000 (HST) From: Jeff Roberson X-X-Sender: jroberson@desktop To: David Xu In-Reply-To: <200804020408.m3248bnW044860@repoman.freebsd.org> Message-ID: <20080401210132.V72156@desktop> References: <200804020408.m3248bnW044860@repoman.freebsd.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/sys umtx.h src/sys/kern kern_umtx.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 Apr 2008 07:04:50 -0000 On Wed, 2 Apr 2008, David Xu wrote: > davidxu 2008-04-02 04:08:37 UTC > > FreeBSD src repository > > Modified files: > sys/sys umtx.h > sys/kern kern_umtx.c > Log: > Introduce kernel based userland rwlock. Each umtx chain now has two lists, > one for readers and one for writers, other types of synchronization > object just use first list. Hey great David! This made an even bigger difference than I originally measured. Once we get a little more concurrency in the io layer with myisam it'll really shine. Thanks, Jeff > > Asked by: jeff > > Revision Changes Path > 1.65 +487 -45 src/sys/kern/kern_umtx.c > 1.31 +21 -1 src/sys/sys/umtx.h >