Detection of feedback control instability in computing device thermal control

A computing system comprising:

• a central processing unit;
• a service processor configured to manage operations of the central processing unit;
• a memory operably connected to the service processor;
• a temperature sensor configured to sense a temperature of the computing system and operably connected to the service processor;
• a non-transitory computer readable medium operably connected to the processor and storing computer-executable instructions for detection of feedback control instability in thermal control that when executed by at least the service processor of the computing system cause the computing system to:
• for each of a series of dwell time intervals, wherein the dwell time intervals are associated with a range of periods of time from an initial period to a base period,
• execute a workload on the central processing unit that varies from minimum to maximum over the period of time on a computing device during the dwell time interval;
• record telemetry data from the computing device during execution of the workload;
• increment the period towards a base period;
• determine that either the base period is reached or a thermal inertia threshold is reached;
• analyze the recorded telemetry data over the set of dwell time intervals to either (i) detect presence of a feedback control instability in thermal control for the computing device;
• or (ii) confirm feedback control stability in thermal control for the computing device.

A non-transitory computer-readable medium that includes stored thereon computer-executable instructions for detection of feedback control instability in thermal control that when executed by at least a service processor of a computer cause the computer to:

• for each of a set of dwell time intervals, wherein the dwell time intervals are associated with a range of periods of time from an initial period to a base period,
• execute a workload a that varies from minimum to maximum over the period of time on a computing device during the dwell time interval;
• record telemetry data from the computing device during execution of the workload;
• increment the period towards a base period;
• determine that either the base period is reached or a thermal inertia threshold is reached;
• analyze the recorded telemetry data over the set of dwell time intervals to either (i) detect presence of a feedback control instability in thermal control for the computing device;
• or (ii) confirm feedback control stability in thermal control for the computing device.