Processor idle state selection in a virtualized environment

A computer system, comprising:

• a processor system comprising a logical processor;
• and
• a computer storage medium that stores computer-executable instructions that are executable by the processor system to at least:
• configure an idle state calculation loop to use a first idle residency calculation type;
• generate a projected processor idle residency using a simple moving average (SMA) of prior processor idle residency;
• determine a target processor idle state based on the projected processor idle residency;
• instruct the logical processor to enter an idle period using the target processor idle state;
• identify an actual processor idle residency for the idle period after the logical processor returns from the idle period;
• determine that the actual processor idle residency was less than the projected processor idle residency;
• and
• configure the idle state calculation loop to use an exponential moving average (EMA) of prior processor idle residency based on determining that the actual processor idle residency was less than the projected processor idle residency.

A computer storage medium that stores computer-executable instructions that are executable by a processor system that comprises a logical processor, the computer-executable instructions including instructions that are executable by the processor system to at least:

• configure an idle state calculation loop to use a first idle residency calculation type;
• generate a projected processor idle residency using a simple moving average (SMA) of prior processor idle residency;
• determine a target processor idle state based on the projected processor idle residency;
• instruct the logical processor to enter an idle period using the target processor idle state;
• identify an actual processor idle residency for the idle period after the logical processor returns from the idle period;
• determine that the actual processor idle residency was less than the projected processor idle residency;
• configure the idle state calculation loop to use an exponential moving average (EMA) of prior processor idle residency based on determining that the actual processor idle residency was less than the projected processor idle residency;
• and
• after a threshold period has elapsed, reset the idle state calculation loop, including configuring the idle state calculation loop to use the first idle residency calculation type.