摘要:
Systems and methods for measuring the effectiveness of a workload predictor operative on a mobile device are disclosed. A load manager includes a workload predictor, a sensor, an error generator and a controller. The workload predictor generates an estimate of the workload on a processor core operative on the mobile device. The sensor generates a measure of the actual workload on the processor core. The error generator receives the estimate of the workload and the measure of the actual workload on the processor core and generates an error signal. The controller receives the error signal and determines the effectiveness of the workload predictor as a function of the error signal over time.
摘要:
Resource state sets corresponding to the application states are maintained in memory. A request may be issued for a processor operating in a first application state corresponding to the first resource state set to transition to a second application state corresponding to the second resource state set. A start time to begin transitioning resources to states indicated in the second resource state set is scheduled based upon an estimated amount of processing time to complete transitioning. A process is begun by which the states of resources are switched from states indicated by the first resource state set to states indicated by the second resource state set. Scheduling the process to begin at a time that allows the process to be completed just in time for the resource states to be immediately available to the processor upon entering the second application state helps minimize adverse effects of resource latency.
摘要:
A method and system for dynamically creating and servicing master-slave pairs within and across switch fabrics of a portable computing device (“PCD”) are described. The system and method includes receiving a client request comprising a master-slave pair and conducting a search for a slave corresponding to the master-slave pair. A route for communications within and across switch fabrics is created and that corresponds to the master-slave pair. One or more handles or arrays may be stored in a memory device that correspond to the created route. Next, bandwidth across the route may be set. After the bandwidth across the newly created route is set, the client request originating the master-slave pair may be serviced using the created route. Conducting the search for the slave may include comparing unique identifiers assigned to each slave in a master-slave hierarchy. The search within and across switch fabrics may also include reviewing a fabric route check table for slaves that can be interrogated within a switch fabric.
摘要:
A method of executing a dynamic clock and voltage scaling (DCVS) algorithm in a central processing unit (CPU) is disclosed and may include monitoring CPU activity and determining whether a workload is designated as a special workload when the workload is added to the CPU activity.
摘要:
A method of dynamically controlling power within a central processing unit is disclosed and may include entering an idle state, reviewing a previous busy cycle immediately prior to the idle state, and based on the previous busy cycle determining a CPU frequency for a next busy cycle.
摘要:
A method of dynamically controlling a central processing unit is disclosed. The method may include determining when a CPU enters a steady state, calculating an optimal frequency for the CPU when the CPU enters a steady state, guaranteeing a steady state CPU utilization, and guaranteeing a steady state CPU utilization deadline.
摘要:
In a portable computing device having a node-based resource architecture, resource requests are batched or otherwise transactionized to help minimize inter-processing entity messaging or other messaging or provide other benefits. In a resource graph defining the architecture, each node or resource of the graph represents an encapsulation of functionality of one or more resources controlled by a processor or other processing entity, each edge represents a client request, and adjacent nodes of the graph represent resource dependencies. A single transaction of resource requests may be provided against two or more of the resources. Additionally, this single transaction may become forked so that parallel processing among a client issuing the single transaction and the resources handling the requests of the single transaction may occur.
摘要:
Resource state sets corresponding to the application states are maintained in memory. A request may be issued for a processor operating in a first application state corresponding to the first resource state set to transition to a second application state corresponding to the second resource state set. A start time to begin transitioning resources to states indicated in the second resource state set is scheduled based upon an estimated amount of processing time to complete transitioning. A process is begun by which the states of resources are switched from states indicated by the first resource state set to states indicated by the second resource state set. Scheduling the process to begin at a time that allows the process to be completed just in time for the resource states to be immediately available to the processor upon entering the second application state helps minimize adverse effects of resource latency.
摘要:
A method and system for managing resources of a portable computing device is disclosed. The method includes receiving node structure data for forming a node, in which the node structure data includes a unique name assigned to each resource of the node. A node has at least one resource and it may have multiple resources. Each resource may be a hardware or software element. The system includes a framework manger which handles the communications between existing nodes within a node architecture. The framework manager also logs activity of each resource by using its unique name. The framework manager may send this logged activity to an output device, such as a printer or a display screen. The method and system may help reduce or eliminate a need for customized APIs when a new hardware or software element (or both) are added to a portable computing device.
摘要:
The aspects enable a multi-core processor or system on chip to determine a low power configuration that provides the most system power savings by placing selected resources in a low power mode depending upon acceptable system latencies, dynamic operating conditions (e.g., temperature), expected idle time, and the unique electrical characteristics of the particular device. Each of the cores/processing units treated in a symmetric fashion, and each core may choose its operating state independent of the other cores, without performing complex handshaking or signaling operations.