摘要:
A system includes one or more processor cores, and a voltage regulator that provides an operating voltage to the one or more processor cores in response to receiving a voltage identifier signal that is indicative of the operating voltage. The system also includes a power management unit that may provide a first voltage identifier signal corresponding to a first operating voltage in response to determining that the processor cores are operating in a first operating state in which the one or more processor cores may draw up to a maximum load current. The power management unit may also provide a second voltage identifier signal corresponding to a second operating voltage, which is less than the first operating voltage, in response to determining that the processor cores are operating in a second operating state in which the processor cores are incapable of an increase in load current above a predetermined amount.
摘要:
An apparatus and method for per-node thermal control of processing nodes is disclosed. The apparatus includes a plurality of processing nodes, and further includes a power management unit configured to set a first frequency limit for at least one of the plurality of processing nodes responsive to receiving an indication of a first detected temperature greater than a first temperature threshold, wherein the first detected temperature is associated with the one of the plurality of processing nodes. The power management unit is further configured to set a second frequency limit for each of the plurality of processing nodes responsive to receiving an indication of a second temperature greater than a second temperature threshold.
摘要:
A system includes one or more processor cores, and a voltage regulator that provides an operating voltage to the one or more processor cores in response to receiving a voltage identifier signal that is indicative of the operating voltage. The system also includes a power management unit that may provide a first voltage identifier signal corresponding to a first operating voltage in response to determining that the processor cores are operating in a first operating state in which the one or more processor cores may draw up to a maximum load current. The power management unit may also provide a second voltage identifier signal corresponding to a second operating voltage, which is less than the first operating voltage, in response to determining that the processor cores are operating in a second operating state in which the processor cores are incapable of an increase in load current above a predetermined amount.
摘要:
An apparatus and method for per-node thermal control of processing nodes is disclosed. The apparatus includes a plurality of processing nodes, and further includes a power management unit configured to set a first frequency limit for at least one of the plurality of processing nodes responsive to receiving an indication of a first detected temperature greater than a first temperature threshold, wherein the first detected temperature is associated with the one of the plurality of processing nodes. The power management unit is further configured to set a second frequency limit for each of the plurality of processing nodes responsive to receiving an indication of a second temperature greater than a second temperature threshold.
摘要:
A processor integrated circuit has one or more processor cores and a power management controller in a North-Bridge that generates a first power state recommendation for the one or more processor cores. The North-Bridge also receives a second power state recommendation from a South-Bridge integrated circuit. The North-Bridge determines a final power state for the one or more processor cores based on the first and second power state recommendations.
摘要:
A system and method for dynamic function based power control is disclosed. In one embodiment, a system includes a bridge unit having a memory controller and a communication hub coupled to the memory controller. The system further includes a power management unit, wherein the power management unit is configured to clock-gate the communication hub responsive to determining that each of a plurality of processor cores are in an idle state and that an I/O interface unit has been idle for an amount of time exceeding a first threshold. The power management unit is further configured to clock-gate the memory controller responsive to clock-gating the communication hub and determining that a memory coupled to the memory controller is in a first low power state. The power management unit may also perform power-gating of functional units subsequent to clock-gating the same.
摘要:
An apparatus and method for performance control of processing nodes is disclosed. In one embodiment, a system includes a processing node and a power management unit configured to, for each of a plurality of time intervals, monitor an activity level of the processing node, cause the processing node to operate at a high operating point during one successive time interval if the activity level in the given interval is greater than a high activity threshold, operate at a low operating point at least one successive time interval if the activity level is less than a low activity threshold, or enable operating system software to cause the processing node to operate at one of one or more predefined intermediate operating points of the plurality of operating points if the activity level is less than the high activity threshold and greater than the low activity threshold.
摘要:
A processing node tracks probe activity level associated with its cache. The processing node and/or processing system further predicts an idle duration. If the probe activity level increases above a threshold probe activity level, and the idle duration prediction is above a threshold idle duration threshold, the processing node flushes its cache to prevent probes to the cache. If the probe activity level is above the threshold probe activity level but the predicted idle duration is too short, the performance state of the processing node is increased above its current performance state to provide enhanced performance capability in responding to the probe requests.
摘要:
A method for power management is disclosed. The method may include monitoring requests for access to a memory of a memory subsystem by one or more processor cores; and monitoring requests for access to the memory conveyed by an input/output (I/O) unit. The method may further include determining if at least a first amount of time has elapsed since any one of the processor cores has asserted a memory access request and determining if at least a second amount of time has elapsed since the I/O unit has conveyed a memory access request. A first signal may be asserted if the first and second amounts of time have elapsed. A memory subsystem may be transitioned from operating in a full power state to a first low power state responsive to assertion of the first signal.
摘要:
A method for transitioning power states in a device includes designating a first reduced power state as a target power state. A first expected residency for the target power state is determined based on a counting of activity requests associated with the device. The device is transitioned to the target power state responsive to the expected residency satisfying a first predetermined threshold.