From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: Re: rtc: lost some interrupts at 1024Hz. Date: Fri, 13 Apr 2007 17:13:57 +0200 Message-ID: <461F9E35.5030901@wpkg.org> References: <461F70FF.9010704@wpkg.org> <461F9D5F.1090009@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Anthony Liguori Return-path: In-Reply-To: <461F9D5F.1090009-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Anthony Liguori schrieb: > Tomasz Chmielewski wrote: >> Whenever I start a guest, I get kernel log filled with "rtc: lost some >> interrupts at 1024Hz". >> > > Does rebooting the host machine with nolapic on the kernel command line > help? It turned out, this option needs to be enabled: Processor type and features ---> [*] Provide RTC interrupt (or CONFIG_HPET_EMULATE_RTC=y in .config). With it enabled, I don't have these messages anymore, and performance is much much better. > What sort of system are you using? # uname -a Linux syn5 2.6.21-rc6 #3 SMP Fri Apr 13 16:37:31 CEST 2007 x86_64 Intel(R) Xeon(R) CPU 3050 @ 2.13GHz GNU/Linux KVM-18. -- Tomasz Chmielewski http://wpkg.org ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV