Collaborative processor and system performance and power management
The present invention relates to a platform power management scheme. In some embodiments, a platform provides a relative performance scale using one or more parameters to be requested by an OSPM system.
1. A memory storage device having instructions that when executed, implement an operating system (OS) power management method, comprising:
reading one or more platform power management interface registers to determine a range of available performance values;
selecting a plurality of performance values, wherein a platform is inhibited from varying a performance above or below a selected performance level when selected; and
evaluating platform performance for the plurality of selected performance values, wherein an OS is to select values in the performance value range from a Lowest through a Nominal value, while running a characterization workload.
2. The memory storage device of claim 1 , in which inhibiting includes selecting performance value parameters that set a minimum, maximum, and desired performance value to the same value.
3. The memory storage device of claim 1 , in which the OS is to evaluate the resulting performances for the selected values.
4. The memory storage device of claim 3 , in which different characterization workloads are used to evaluate performance levels for different processing task types.
5. The memory storage device of claim 4 , in which at least one of the processing task types includes a quality of service (QoS) task type to determine minimum performance levels desired for one or more different QoS scenarios.
6. A computing platform having an Operating System (OS) that, when executing, performs a method, comprising:
reading one or more platform power management interface registers to determine a range of available performance values;
selecting a plurality of performance values, wherein a platform is inhibited from varying a delivered performance above or below a selected performance level when selected; and
evaluating platform performance for the plurality of selected performance values,
wherein an OS is to select values in the performance value range from a Lowest through a Nominal value, while running a characterization workload.
7. The computing platform of claim 6 , in which inhibiting includes selecting performance value parameters that set a minimum, maximum, and desired performance value to the same value.
8. The computing platform of claim 6 , in which the OS is to evaluate the resulting performances for the selected values.
9. The computing platform of claim 8 , in which different characterization workloads are used to evaluate performance levels for different processing task types.
10. The computing platform of claim 9 , in which at least one of the processing task types includes a quality of service (QoS) task type to determine minimum performance levels desired for one or more different QoS scenarios.