摘要:
To perform execution scheduling of function blocks so as to control the total required power of the function blocks within a supplyable power budget value, and thereby realize stable operations at low power consumption. Function block identifiers are allotted to all the function blocks, and to a RAM area that a power consumption control device can read and write, a list to store identifiers and task priority, power mode value showing power states, and power mode time showing the holding time of power states can be linked. A single or plural link lists for controlling the schedules of tasks operating on the function blocks, a link list for controlling the function block in execution currently in high power mode, a link list for controlling the function block in stop currently in stop mode, and a link list for controlling the function block in execution currently in low power mode are allotted, and thereby the power source and the operation clock are controlled by the power consumption control device.
摘要:
A chip (1) includes: a resource manager (2); various kinds of functional blocks (3-6); a thermal sensor (13); and a performance counter (15). The resource manager manages tasks that the functional blocks execute, and determines a task progress (38) for each task from an activated ratio (α) provided from the performance counter and a deadline (39) contained in task information (33) and decides priority of each task. When the temperature detected by the thermal sensor during execution of a task is not less than a threshold (T_max), the resource manager reads out a power consumption budget (P_max) from a memory (9) which has been set to make the temperature below the threshold, and stops the clock fed to the functional block executing a task having a lower priority or lowers the frequency of the clock until a chip power consumption value (p_sum) becomes smaller than the power consumption budget.
摘要:
A technology capable of efficiently performing the processes by using limited resources in an LSI where a plurality of real-time applications are parallelly processed is provided. To provide such a technology, a mechanism is provided in which a plurality of processes to be executed on a plurality of processing units in an LSI are managed throughout the LSI in a unified manner. For each process to be managed, a priority is calculated based on the state of progress of the process, and the execution of the process is controlled according to the priority. A resource management unit IRM or program that collects information such as a process state from each of the processing units executing the processes and calculates a priority for each process is provided. Also, a programmable interconnect unit and storage means for controlling a process execution sequence according to the priority are provided.
摘要:
A technology capable of efficiently performing the processes by using limited resources in an LSI where a plurality of real-time applications are parallelly processed is provided. To provide such a technology, a mechanism is provided in which a plurality of processes to be executed on a plurality of processing units in an LSI are managed throughout the LSI in a unified manner. For each process to be managed, a priority is calculated based on the state of progress of the process, and the execution of the process is controlled according to the priority. A resource management unit IRM or program that collects information such as a process state from each of the processing units executing the processes and calculates a priority for each process is provided. Also, a programmable interconnect unit and storage means for controlling a process execution sequence according to the priority are provided.
摘要:
To perform execution scheduling of function blocks so as to control the total required power of the function blocks within a supplyable power budget value, and thereby realize stable operations at low power consumption. Function block identifiers are allotted to all the function blocks, and to a RAM area that a power consumption control device can read and write, a list to store identifiers and task priority, power mode value showing power states, and power mode time showing the holding time of power states can be linked. A single or plural link lists for controlling the schedules of tasks operating on the function blocks, a link list for controlling the function block in execution currently in high power mode, a link list for controlling the function block in stop currently in stop mode, and a link list for controlling the function block in execution currently in low power mode are allotted, and thereby the power source and the operation clock are controlled by the power consumption control device.
摘要:
A semiconductor integrated circuit device which consumes less power and enables real-time processing. The semiconductor integrated circuit device includes thermal sensors which detect temperature and determine whether the detection result exceeds reference values and output the result, and a control block capable of controlling the operations of arithmetic blocks based on the output signals of the thermal sensors. The control block returns to an operation state from a suspended state with an interrupt signal based on the output signals of the thermal sensors and determines the operation conditions of the arithmetic blocks to ensure that the temperature conditions of the arithmetic blocks are satisfied. Thereby, power consumption is reduced and real-time processing efficiency is improved.
摘要:
There is provided a semiconductor integrated circuit device which consumes less power and enables real-time processing. The semiconductor integrated circuit device comprises: thermal sensors which can detect temperature, determine whether the detection result exceeds each of the above reference values and output the result; and a control block capable of controlling the operations of arithmetic blocks based on the output signals of the thermal sensors, wherein the control block returns to an operation state from a suspended state with an interrupt signal based on the output signals of the thermal sensors and determines the operation conditions of the arithmetic blocks to ensure that the temperature conditions of the arithmetic blocks are satisfied. Thereby, power consumption is reduced and real-time processing efficiency is improved.
摘要:
An information processing device having low power consumption without affecting interruption request response speed. The device specifies a waiting time until execution of a given event and makes a system call and includes a first timer circuit for a first cycle; a second timer circuit for a second cycle shorter than the first cycle; a timeout supervisor which stores the waiting time; and a first cycle supervisor which stores waiting time until the next interruption request. The timeout supervisor stores the time calculated by subtraction of the waiting time stored in the first cycle supervisor from that in the timeout supervisor upon an interruption request from the first timer; and if the waiting time stored in the timeout supervisor is shorter than the first cycle, the second cycle time is subtracted from the time stored in the timeout supervisor upon an interruption request from the second timer circuit.
摘要:
An information processing device having low power consumption without affecting interruption request response speed. The device specifies a waiting time until execution of a given event and makes a system call and includes a first timer circuit for a first cycle; a second timer circuit for a second cycle shorter than the first cycle; a timeout supervisor which stores the waiting time; and a first cycle supervisor which stores waiting time until the next interruption request. The timeout supervisor stores the time calculated by subtraction of the waiting time stored in the first cycle supervisor from that in the timeout supervisor upon an interruption request from the first timer; and if the waiting time stored in the timeout supervisor is shorter than the first cycle, the second cycle time is subtracted from the time stored in the timeout supervisor upon an interruption request from the second timer circuit.
摘要:
On the occasion of returning an error code to an application program to be executed under different execution environments of a computing system, it is requested to fully utilize a system of the existing instruction set to improve the ROM efficiency in the implementation of its common code and to eliminate useless insertion of instruction.For this purpose, in the present invention, a common error code to be returned, from the program to be used to be independent on different OS, to the execution program corresponding to the application program is determined as a value in the range of numerical value to be set with the instruction set of CPU and the defined instruction to load immediate value and thereby the common error code is held within the instruction code of the instruction to load immediate value. Particularly, a value of common error code is determined within the range where the MSB of the setting part of the instruction to load immediate value becomes zero (0).