Mediatek Corporation

Hung-Lin Chou

Yu-Ming Lin

Chia-Hao Hsu

Ming-Hsien Lee

Jia-Ming Chen

Ya-Ting Chang

Yin Jen Chen

Nicholas Ching Hui Tang

Tzu-Jen Lo

Yu-Ting Chen

Yun-Ching Li

Lee-Kee Yong

Pi-Cheng Hsiao

Yu-Chung Chang

Jen-Chieh Yang

Shih-Yen Chiu

Wan-Ching Huang

Yeh-Ji Chou

Fan-Lei Liao

Chih-Yung Chiu

Chieh-Yuan Hsu

Shou-Wen Ho

Chun-Hang Wei

Koon Woon Soon

A multiprocessor system includes a first set of processors and a second set of processors. The first set of processors include a first set of standard cells and is configured to operate in a first frequency range. The second set of processors include a second set of standard cells and is configured to operate in a second frequency range. The first set of processors and the second set of processors have the same register-transfer level (RTL) description. Cells in the first set of standard cells have corresponding cells in the second set of standard cells with different characteristics. The first frequency range includes one or more frequencies higher than a maximum frequency in the second frequency range. The system also includes a clock generator that provides the same frequency to the first set of processors and the second set of processors.

Multiprocessor systems having processors with different processing capabilities connecting to a clock generator

A method for performing processor resource allocation in an electronic device is provided, where the method may include the steps of: obtaining task-related information to determine whether a task of a plurality of tasks is a heavy task (e.g. the heavy task may correspond to heavier loading than others of the plurality of tasks), to selectively utilize a specific processor core within a plurality of processor cores to perform the task, and determining whether at least one scenario task exists within others of the plurality of tasks, to selectively determine according to application requirements a minimum processor core count and a minimum operating frequency for performing the at least one scenario task; and performing processor resource allocation according to a power table and system loading, to perform any remaining portion of the plurality of tasks. An apparatus for performing processor resource allocation according to the above method is provided.

Method for performing processor resource allocation in an electronic device, and associated apparatus

Energy efficiency is managed in a multi-cluster system. The system detects an event in which a current operating frequency of an active cluster enters or crosses any of one or more predetermined frequency spots of the active cluster, wherein the active cluster includes one or more first processor cores. When the event is detected, the system performs the following steps: (1) identifying a target cluster including one or more second processor cores, wherein the each first processor core in the first cluster and each second processor core in the second cluster have different energy efficiency characteristics; (2) activating at least one second processor core in the second cluster; (3) determining whether to migrate one or more interrupt requests from the first cluster to the second cluster; and (4) determining whether to deactivate at least one first processor core of the active cluster based on a performance and power requirement.

Energy efficiency strategy for interrupt handling in a multi-cluster system

A multi-cluster system having processor cores of different energy efficiency characteristics is configured to operate with high efficiency such that performance and power requirements can be satisfied. The system includes multiple processor cores in a hierarchy of groups. The hierarchy of groups includes: multiple level-1 groups, each level-1 group including one or more of processor cores having identical energy efficiency characteristics, and each level-1 group configured to be assigned tasks by a level-1 scheduler; one or more level-2 groups, each level-2 group including respective level-1 groups, the processor cores in different level-1 groups of the same level-2 group having different energy efficiency characteristics, and each level-2 group configured to be assigned tasks by a respective level-2 scheduler; and a level-3 group including the one or more level-2 groups and configured to be assigned tasks by a level-3 scheduler.

Energy efficient multi-cluster system and its operations

A task scheduling method is applied to a heterogeneous multi-core processor system. The heterogeneous multi-core processor system has at least one first processor core and at least one second processor core. The task scheduling method includes: referring to task priorities of tasks of the heterogeneous processor cores to identify at least one first task of the tasks that belongs to a first priority task group, wherein each first task belonging to the first priority task group has a task priority not lower than task priorities of other tasks not belonging to the first priority task group; and dispatching at least one of the at least one first task to at least one run queue of at least one of the at least one first processor core.

Task scheduling method for dispatching tasks based on computing power of different processor cores in heterogeneous multi-core processor system and related non-transitory computer readable medium

A multi-core processor system and a method for assigning tasks are provided. The multi-core processor system includes a plurality of processor cores, configured to perform a plurality of tasks, and each of the tasks is in a respective one of a plurality of scheduling classes. The multi-core processor system further includes a task scheduler, configured to obtain first task assignment information about tasks in a first scheduling class assigned to the processor cores, obtain second task assignment information about tasks in one or more other scheduling classes assigned to the processor cores, and refer to the first task assignment information and the second task assignment information to assign a runnable task in the first scheduling class to one of the processor cores.

Multi-core processor systems and methods for assigning tasks in a multi-core processor system

A CPU control method for controlling a first CPU and a second CPU The method comprises: (a) applying the first CPU to execute a first group of codes comprising at least one code if the first CPU is operating to perform a first function; and (c) applying the second CPU to execute a second group of codes comprising at least one code if the second CPU is operating to perform the first function. The first group of codes is optimized for the first CPU, the second group of codes is optimized for the second CPU and the first group of codes comprises at least one code different from the code for the second group of codes.

CPU control method, electronic system control method and electronic system for improved CPU utilization in executing functions

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Zhubei, Taiwan

Hung-Lin Chou