[kwlug-disc] Virtualization technology

[Khalid Baheyeldin]

On Mon, Jul 28, 2014 at 5:05 PM, Khalid Baheyeldin <kb at 2bits.com> wrote:

> Also, I saw even when the VMs are idle (quiescent system), the the number
> of context switches and interrupts on the host (physical) go up
> significantly (130 per second to over 2,000 per seconds). That may be
> unescapable overhead, and therefore I am asking ...
>

And now that I am able to get two VMs up and running on the same physical
host using libvirt + KVM, instead of VirtualBox, I seems that KVM has less
overhead than VirtualBox.

The number of context switches and interrupts is ~ 250 and ~ 470 per second
with KVM, as opposed to ~ 2,000 with VirtualBox (both cases had 2 VMs
active at the time, but quiescent).

So, perhaps all this effort of getting up and running is worth it.
-- 
Khalid M. Baheyeldin
2bits.com, Inc.
Fast Reliable Drupal
Drupal optimization, development, customization and consulting.
Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
Simplicity is the ultimate sophistication. --   Leonardo da Vinci
For every complex problem, there is an answer that is clear, simple, and
wrong." -- H.L. Mencken
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