David Abrahams wrote: > on Thu Apr 12 2007, Avi Kivity > <avi-atKUWr5tajBWk0Htik3J/w-AT-public.gmane.org> wrote: > > >> David Abrahams wrote: >> >>> When I start my Windows VM with -no-kvm, it seems to boot much more >>> quickly than without. >>> >> You probably have acpi enabled in Windows. This causes massive >> slowdowns in kvm; the real fix will unfortunately require you to upgrade >> your hardware. >> > > My physical hardware? Which part? >
The part that currently doesn't virtualize the apic tpr: the cpu. It happens that Windows in acpi mode likes to bang on this register quite a lot, and that the penalty for accessing this register is several microseconds (instead of nanoseconds). Most of the time in a (virtual) Windows boot is spent on reading and writing this register. > Is starting the vm with -no-acpi insufficient? I just realized, I > haven't been doing that. > It won't help if Windows wants acpi, I think. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- 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 _______________________________________________ kvm-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/kvm-devel
