From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Large sized guest taking for ever to boot... Date: Wed, 13 Jun 2012 11:14:02 +0300 Message-ID: <4FD84BCA.2090400@redhat.com> References: <1339173966.26976.95.camel@ul30vt> <4FD23221.5090208@hp.com> <1339177340.26976.111.camel@ul30vt> <4FD23CF9.5000203@hp.com> <4FD23FA0.6060202@siemens.com> <4FD24285.1060702@hp.com> <4FD2467B.1080005@siemens.com> <4FD76167.4080705@hp.com> <20120612153933.GB4206@redhat.com> <4FD78DF7.5020006@hp.com> <20120613071215.GB19440@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Chegu Vinod , Jan Kiszka , Alex Williamson , "kvm@vger.kernel.org" , qemu-devel To: Gleb Natapov Return-path: Received: from mx1.redhat.com ([209.132.183.28]:1028 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750982Ab2FMION (ORCPT ); Wed, 13 Jun 2012 04:14:13 -0400 In-Reply-To: <20120613071215.GB19440@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 06/13/2012 10:12 AM, Gleb Natapov wrote: >> >> I tried that and didn't make any difference...i.e. the RHEL6.3 RC1 >> guest booted in about ~1 min. >> > Thank you. So this means that ticket spinlock is not to blame for the > slow down compared ti RHEL kernel. > > Where 3.4.1 spends most of the time while booting? Is slow down begins > before or after the kernel starts userspace? In addition: kvm_stat perf top perf kvm top while the slowdown occurs. -- error compiling committee.c: too many arguments to function