On November 12, 2007 04:04:59 pm Frank Mehnert wrote: > On Monday 12 November 2007, Alexey Eremenko wrote: > > On Nov 12, 2007 10:21 PM, Mike Jeays <[EMAIL PROTECTED]> wrote: > > > I am delighted with the performance of Windows 2000 and XP within > > > VirtualBox (hosted on a Pentium 1.8 with 1.5 GB of storage, running > > > Gutsy Gibbon). It seems close to native performance - excellent. > > > > > > But two Linux flavors (Fedora 7 and Mandrive 8) are unusably slow - > > > especially Mandriva. > > > > > > Any good explanation or suggestions to fix the problem, please? > > > > VirtualBox dislikes tickless kernels. Use "nohz=off" in your > > bootloader. With a properly configured Linux kernel, it's possible to > > get top-notch performance (no tickless, HZ=100). > > Don't mix guest and host here. tickless is only an issue for host kernels. > HZ=100 is recommended for guest kernels. > > Kind regards, > > Frank
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? -- Mike Jeays http://www.jeays.ca _______________________________________________ vbox-users mailing list [email protected] http://vbox.innotek.de/mailman/listinfo/vbox-users
