Is this still an issue for you? There were some actual KSM corruption bugs which were somewhat recently fixed.
KSM in general wil use more CPU in order to reduce memory contention, so your results are not necessarily unexpected. Aside from turning KSM off, you can also reduce the KSM frequency. There are some other tuning hints at http://www.linux- kvm.org/page/Tuning_Kernel ** Changed in: qemu-kvm (Ubuntu) Status: New => Incomplete ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1368439 Title: Random high latency with KSM enabled and multiple CPU sockets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1368439/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
