Language Selection

English French German Italian Portuguese Spanish

Improving KVM Performance With A Tickless Kernel

Filed under
Linux

Avi Kivity suggested that combining KVM, the Kernel-based Virtual Machine, with the dyntick patch could improve overall KVM performance. He noted that it would likely improve performance of both the host by "avoiding expensive vmexits due to useless timer interrupts," as well as on the guest by "reducing the load on the host when the guest is idling (currently an idle guest consumes a few percent cpu)".

Ingo Molnar pointed out that KVM with his -rt kernel already works with dynticks enabled on both the host and the guest, "using the dynticks code from the -rt kernel makes the overhead of an idle guest go down by a factor of 10-15". Ingo added that he hopes the dyntick patch will be ready to be merged into the upcoming mainline 2.6.21 kernel.

Rik van Reil noted that there were other ways to reduce the load of the guest when it's idling,

Full Story.

More in Tux Machines

NVIDIA Linux Performance-Per-Dollar: What The RX 480 Will Have To Compete Against

There's a lot of benchmarking going on this weekend at Phoronix in preparation for next week's Radeon RX 480 Linux review. Here are some fresh results on the NVIDIA side showing the current performance-per-dollar data for the NVIDIA Maxwell and Pascal graphics cards for seeing what the RX 480 "Polaris 10" card will be competing against under Linux. Read more

RaspAnd Project Brings Android 6.0 Marshmallow to Raspberry Pi 3, Now with GAAPS

Android-x86 and GNU/Linux developer Arne Exton has informed Softpedia today, June 25, 2016, about the immediate availability of a new build of his RaspAnd distribution for Raspberry Pi single-board computers. RaspAnd Build 160625 is the first to move the Android-x86-based distro to the latest Android 6.0.1 Marshmallow mobile operating system created by Google. And in the good tradition of the RaspAnd project, both Raspberry Pi 3 Model B and Raspberry Pi 2 Model B are supported. Read more

BSD Leftovers

  • FreeBSD 11.0 Alpha 5 Released, Schedule So Far Going On Track
    The fifth alpha release of the huge FreeBSD 11.0 operating system update is now available for testing. FreeBSD 11.0 is bringing updated KMS drivers, Linux binary compatibility layer improvements, UEFI improvements, Bhyve virtualization improvements, and a wide range of other enhancements outlined via the in-progress release notes.
  • DragonFly's HAMMER2 File-System Sees Some Improvements
    The HAMMER2 file-system is going on four years in development by the DragonFlyBSD crew, namely by its founder Matthew Dillon. It's still maturing and taking longer than anticipated, but this is yet another open-source file-system.

Debian GNU/Linux 9 "Stretch" to Ship with GCC 6 by Default, Binutils 2.27

Debian developer Matthias Klose has announced that the new GCC 6 compiler, which will be made the default GCC compiler for the upcoming Debian GNU/Linux 9 "Stretch" operating system, is now available in the Debian Testing repos. Debian users who are currently using Debian Testing can make GCC 6 the default compiler by installing the gcc/g++ packages from experimental. If installing it, they are also urged to help fix reported built failures in Debian Testing and Debian Unstable. Read more