Resource management for a system-on-chip (SoC)

• US 20050125797A1
• Filed: 12/07/2004
• Published: 06/09/2005
• Est. Priority Date: 12/09/2003
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Saqmeister, Patricia M., Gabrani, Maria, Buchmann, Peter, Herkersdorf, Andreas, Doering, Andreas C.
• Application Number:
  US11/005,955
• Publication Number:
  US 20050125797A1
• Time in Patent Office: Days
• US Class Current: 718/100
• CPC Class Codes: G06F 2209/5019 Workload prediction
• CPC Class Codes: G06F 2209/5022 Workload threshold
• CPC Class Codes: G06F 9/505 considering the load

Abstract

Provides evaluation and management of system resources in a data processing system, particularly in a SoC device and for optimizing the operation of the system wherein the system having a plurality of components each operable to process dedicated tasks in the data processing system, wherein each of the components has its associated current resource usages depending on the currently processed task and/or its future resource usage depending on the tasks to be processed next, wherein the resource usage indicates the type of resources and the amount of resources used, wherein the processing of the task of at least one of the components can be modified to adapt the resource usage of this or other component. A method including: determining operating states; estimating current and future resource usage; if necessary adapting task processing according to a predefined scheme to reduce the-resource usage.

Claims

1. A method comprising an on-chip data processing system comprising evaluating and managing system resources of the on-chip data processing system, wherein the system having a plurality of components each operable to process dedicated tasks, wherein each of the components having associated one or more current resource usages depending on the currently processed task and/or having associated one or more future resource usages depending on the task to be processed next, wherein a resource usage indicates the type of resource and the amount of the resource used,

wherein the processing of at least one task can be modified to adapt a resource usage of the component such task is assigned to or of other component;

the step of evaluating and managing including following steps;

determining the current and/or future resource usage for at least a set of components;

if the current and/or future resource usage of at least one component of this set goes beyond a given resource usage limit of the respective component, adapting the task processing of the system according to a predefined scheme.

2. A method according to claim 1, wherein the step of adapting the task processing of the system comprises a redirecting of the processing of a task assigned to one component to another component.

3. A method according to claim 1, wherein the task processing assigned to at least one of the components is adapted depending on the current and/or future resource usage determined for this or another component.

4. A method according to claim 1, wherein the task processing of at least one of the components is adapted according to implemented rules or policies previously stored.

5. A method according to claim 1, wherein the adapting of the task processing is performed depending on the number of tasks to be successively performed.

6. A method according to claim 1, wherein the adapting of the task processing is performed to influence the likelihood of a reducing of a future resource usage of the respective component.

7. A method according to claim 1, including the following step:

transmitting information related to one or more operating states of components to a resource management unit.

8. A method according to claim 1, wherein while estimating of the future resource usage of the components a likelihood of the correctness of the estimation is determined, and

wherein the estimated future resource usage includes the likelihood of resource usage in a further processing of tasks.

9. A method according to claim 1, wherein the components are interconnected via respective ports wherein the resource usage is defined by the data traffic of each port.

10. A method according to claim 1, wherein at least one of the resource usages is based on one of the following resource types:

power consumption, component temperature, transmission capacity of a data bus, memory space of a buffer, of a cache and/or of program memory, data queue space and processing capacity.

11. A method according to claim 1, wherein at least one of the components is a cache memory, wherein the bandwidth of a data transfer to and from the cache memory is depending on the cache misses wherein the cache strategy is adapted depending on the rate of cache misses.

12. A method according to claim 1, wherein the adapting of the task processing of at least one of the components comprises a performing of a respective task at an earlier or a later time.

13. A method according to claim 12, wherein an estimating of future resource usages is implemented by estimating the resource usages for a set of components and for each time interval within a set of subsequent time intervals respectively, wherein a time interval within this set of time intervals is detected as a critical time interval when the resource usage estimated for this time interval goes beyond the resource usage limit, and wherein for a component'"'"'s critical time interval the assigned task processing is adapted.

14. A method according to claim 13, wherein the length of the time interval is variable depending on the respective function of the respective component.

15. A method according to claim 1, wherein the estimating of the resource usages and/or the predefined scheme to adapt the task processing of the component are learned by an appropriate adaptation strategy.

20. An article of manufacture comprising a computer usable medium having computer readable program code means embodied therein for causing functions of an on-chip data processing system, the computer readable program code means in said article of manufacture comprising computer readable program code means for causing a computer to effect the steps of claim 1.

21. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for an on-chip data processing system, said method steps comprising the steps of claim 1.

22. A computer program product comprising a computer usable medium having computer readable program code means embodied therein for causing functions of an on-chip data processing system, the computer readable program code means in said computer program product comprising computer readable program code means for causing a computer to effect the functions of claim 11.

16. A data processing system for evaluating and managing system resources of an on-chip system, including:

a plurality of on-chip components operable to perform dedicated tasks, each of the components having associated one or more current resource usages depending on the currently processed task and/or having associated one or more future resource usages depending on the task to be processed next, wherein the processing of a task of at least one of the components can be modified such to adapt the resource usage of this or other component;

a resource evaluation unit for determining the current and/or the future resource usage for at least a set of components;

a resource management unit for adapting the task processing of at least one of the components according to a predefined scheme, if the current and/or future resource usage of one component of this set goes beyond a given resource usage limit.

17. A system according to claim 16, wherein the resource management unit comprises a number of resource management modules associated to the components, respectively.

18. A system according to claim 17, wherein the resource evaluation unit comprises evaluating modules each associated to one of the components.

19. A system according to claim 18, wherein the resource management module and state evaluating module of at least one of the components are included in a common intra-resource evaluation and management module associated to the respective component, wherein any of the intra-resource evaluation and management modules is either interconnected to a central part of the aggregation and decision unit to provide resource usage data or proximate to the respective component.