Awesome article! One point of contention, though:<p>&gt;and stolen time (by other guests, or with Xen, the guest&#x27;s own isolated driver domain).<p>This isn&#x27;t necessarily true. If there is any sort of credit scheduler interaction ( <a href="http:&#x2F;&#x2F;wiki.xen.org&#x2F;wiki&#x2F;Credit_Scheduler" rel="nofollow">http:&#x2F;&#x2F;wiki.xen.org&#x2F;wiki&#x2F;Credit_Scheduler</a> ) resulting in the CPU being throttled, it will show as steal. Steal actually just means the CPU was not in a runnable state, which can be caused by multiple things, but predominately throttling by the CPU scheduler.