Okay, time for an update: Host: Now running Ubuntu Natty 11.04 x86_64 on an AMD Phenom II x4 955 platform, linux-image-server as kernel Guests: 2x Ubuntu 10.04 LTS x86_64, 1x Ubuntu LTS 10.04 32bit i686, all three systems use linux-image-virtual as kernel (issue occurs on all other installable kernels, - pae, -generic)
If I use >1 CPU for the kvm guests, the hrtimer appears in the dmesg and the systems slow to a crawl. When I only assign 1 CPU to the guests the issue does not occur. This but has been known since sept 2009 and SMP guests are unusable because of this, is anyone looking into this? ** Summary changed: - after kernel message hrtimer: interrupt too slow.... the kvm guest becomes slow [possible solution found!] + after kernel message hrtimer: interrupt too slow.... the SMP(!) kvm guest becomes slow. ** Package changed: linux (Ubuntu) => kvm (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/503138 Title: Lucid & Natty, KVM, After kernel message hrtimer: interrupt too slow.... the SMP kvm guest becomes slow. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/503138/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
