On Tuesday 13 November 2007, Mike Jeays wrote: > On November 12, 2007 04:04:59 pm Frank Mehnert wrote: > > Don't mix guest and host here. tickless is only an issue for host > > kernels. HZ=100 is recommended for guest kernels. > > Thanks for the hints. I tried setting nohz=off in /boot/grub/menu.lst on > the host, and also tried it at boot time. I booted the Mandriva guest with > hz=100. It didn't seem to make much difference. Typical start times for > Mozilla on the host are 9 seconds, on the guest 65 seconds. I got similar > results for GIMP and OpenOffice - about 7 times slower. > > Did I get them the right way around? Any other suggestions, plase?
Booting the Mandria kernel with hz=100 will not help, you have to recompile your guest kernel. Recompiling your host kernel with CONFIG_HZ=1000 might help a bit as well. All in all this is a known issue and we are trying to improve things here. Kind regards, Frank -- Dr.-Ing. Frank Mehnert innotek GmbH, http://www.innotek.de
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