From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carsten Otte Subject: Re: [patch 2/2] QEMU: decrease console "refresh rate" with -nographic Date: Wed, 16 Apr 2008 16:24:03 +0200 Message-ID: <48060C03.3040405@de.ibm.com> References: <20080411183852.150819622@localhost.localdomain> <20080411184851.559593822@localhost.localdomain> <4802352A.4010105@flac.kalibalik.dk> <20080414150255.GA11640@dmt> <48038526.3090702@qumranet.com> <20080414172446.GA27224@dmt> <35388.bFoQE3daRhY=.1208244417.squirrel@webmail.hotelhot.dk> <48047519.9080007@qumranet.com> <4804B9B3.3040904@codemonkey.ws> <4804BF88.1070003@qumranet.com> <20080415150423.GA3363@dmt> <4804CAF7.3060606@codemonkey.ws> <4804CD07.2000600@qumranet.com> <4804F075.5090502@codemonkey.ws> <4805BAAC.2010000@qumranet.com> <480604D5.3040401@codemonkey.ws> Reply-To: carsteno@de.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel@lists.sourceforge.net, Marcelo Tosatti , Avi Kivity To: Anthony Liguori Return-path: In-Reply-To: <480604D5.3040401@codemonkey.ws> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org Anthony Liguori wrote: > There is a 5th option. Do away with the use of posix aio. We get > absolutely no benefit from it because it's limited to a single thread. > Fabrice has reverted a patch to change that in the past. How about using linux aio for it? It seems much better, because it doesn't use userspace threads but has a direct in-kernel implementation. I've had good performance on zldisk with that, and it's stable. ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone