User level control of power management policies

A non-transitory machine-readable medium having stored thereon instructions, which if performed by a machine cause the machine to perform a method comprising:

• receiving an energy performance bias (EPB) value in a tuning circuit of a power control logic of a processor from a plurality of threads executing on the processor and determining a global EPB value based at least in part on the EPB value received from the plurality of threads, the EPB value to indicate a preference of a user for a tradeoff between power optimization and performance optimization;
• accessing a table based on the global EPB value;
• and
• updating at least one setting of a power management feature controlled by the power control logic based on information obtained from the table.

A system comprising:

• a multicore processor including a plurality of cores, at least one cache memory and a memory controller;
• a tuning circuit to dynamically select a balance between power consumption and performance based on an energy performance bias (EPB) value, wherein the tuning circuit is to access an entry of a tuning table based at least in part on the EPB value and a workload configuration value and update a setting for a power management feature responsive to a value stored in a field of the entry, wherein the workload configuration value is to indicate a predominant workload type to be executed on the system, the tuning table including a first set of entries associated with a first workload type and a second set of entries associated with a second workload type;
• and
• a system memory coupled to the multicore processor via a memory interconnect.