TEMPERATURE-AWARE TASK SCHEDULING AND PROACTIVE POWER MANAGEMENT

• US 20170371719A1
• Filed: 06/24/2016
• Published: 12/28/2017
• Est. Priority Date: 06/24/2016
• Status: Active Grant

• Current Assignee: Advanced Micro Devices, Inc.
• Original Assignee: Advanced Micro Devices, Inc.
• Inventors: Majumdar, Abhinandan, Kocoloski, Brian J., Piga, Leonardo, Huang, Wei, Eckert, Yasuko
• Granted Patent: US 10,452,437 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/206 comprising thermal management
• CPC Class Codes: G06F 1/329 by task scheduling
• CPC Class Codes: G06F 9/4893 taking into account power or heat criteria power management in computers in general G06F1/3203; thermal management in computers in general G06F1/206
• CPC Class Codes: G06F 9/5094 where the allocation takes into account power or heat criteria power management in computers in general G06F1/3203; thermal management in computers in general G06F1/206
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

Systems, apparatuses, and methods for performing temperature-aware task scheduling and proactive power management. A SoC includes a plurality of processing units and a task queue storing pending tasks. The SoC calculates a thermal metric for each pending task to predict an amount of heat the pending task will generate. The SoC also determines a thermal gradient for each processing unit to predict a rate at which the processing unit'"'"'s temperature will change when executing a task. The SoC also monitors a thermal margin of how far each processing unit is from reaching its thermal limit. The SoC minimizes non-uniform heat generation on the SoC by scheduling pending tasks from the task queue to the processing units based on the thermal metrics for the pending tasks, the thermal gradients of each processing unit, and the thermal margin available on each processing unit.

Claims

1. A system comprising:

a plurality of processing units; and

a task queue for storing a plurality of pending tasks;

wherein the system is configured to;

calculate a thermal metric for each pending task of the plurality of pending tasks stored in the task queue;

determine a thermal gradient for each processing unit of the plurality of processing units;

monitor a thermal margin available on each processing unit; and

reduce non-uniform heat generation in the system by scheduling pending tasks from the task queue to the plurality of processing units based on the thermal metrics of the pending tasks, the thermal gradients of each processing unit, and the thermal margin available on each processing unit.

2. The system as recited in claim 1, wherein the system is configured to schedule pending tasks from the task queue to the plurality of processing units to prevent thermal limits of the processing units from being exceeded.

3. The system as recited in claim 2, wherein the system is configured to assign pending tasks from the task queue out of order to reduce non-uniform heat generation on the system while preventing the thermal limits of the processing units from being exceeded.

4. The system as recited in claim 2, wherein the system is configured to adjust power states to the plurality of processing units when scheduling pending tasks to the plurality of processing units to reduce non-uniform heat generation on the system while preventing the thermal limits of the processing units from being exceeded.

5. The system as recited in claim 1, wherein the system is configured to:

generate a first product by multiplying a thermal metric of a first pending task by a thermal gradient of a first processing unit;

compare the first product to a thermal margin of the first processing unit; and

allow the first pending task to be scheduled to the first processing unit if the first product is less than or equal to the thermal margin of the first processing unit.

6. The system as recited in claim 1, wherein a thermal metric for a given task is calculated based on an analysis of instructions of the given task.

7. The system as recited in claim 1, wherein a thermal metric for a given task is calculated based on a historical data associated with previous executions of the given task.

8. A method comprising:

calculating a thermal metric for each pending task of a plurality of pending tasks stored in a task queue;

determining a thermal gradient for each processing unit of a plurality of processing units;

monitoring a thermal margin available on each processing unit; and

reducing non-uniform heat generation by scheduling pending tasks from the task queue to the plurality of processing units based on the thermal metrics of the pending tasks, the thermal gradients of each processing unit, and the thermal margin available on each processing unit.

9. The method as recited in claim 8, further comprising scheduling pending tasks from the task queue to the plurality of processing units to prevent thermal limits of the processing units from being exceeded.

10. The method as recited in claim 9, further comprising assigning pending tasks from the task queue out of order to reduce non-uniform heat generation on the system while preventing the thermal limits of the processing units from being exceeded.

11. The method as recited in claim 9, further comprising adjusting power states to the plurality of processing units when scheduling pending tasks to the plurality of processing units to reduce non-uniform heat generation on the system while preventing the thermal limits of the processing units from being exceeded.

12. The method as recited in claim 8, further comprising:

generating a first product by multiplying a thermal metric of a first pending task by a thermal gradient of a first processing unit;

comparing the first product to a thermal margin of the first processing unit; and

allowing the first pending task to be scheduled to the first processing unit if the first product is less than or equal to the thermal margin of the first processing unit.

13. The method as recited in claim 8, wherein a thermal metric for a given task is calculated based on an analysis of instructions of the given task.

14. The method as recited in claim 8, wherein a thermal metric for a given task is calculated based on a historical data associated with previous executions of the given task.

15. A non-transitory computer readable storage medium storing program instructions, wherein the program instructions are executable by a processor to:

calculate a thermal metric for each pending task of a plurality of pending tasks stored in a task queue;

determine a thermal gradient for each processing unit of a plurality of processing units;

monitor a thermal margin available on each processing unit; and

reduce non-uniform heat generation by scheduling pending tasks from the task queue to the plurality of processing units based on the thermal metrics of the pending tasks, the thermal gradients of each processing unit, and the thermal margin available on each processing unit.

16. The non-transitory computer readable storage medium as recited in claim 15, wherein the program instructions are further executable by a processor to schedule pending tasks from the task queue to the plurality of processing units to prevent thermal limits of the processing units from being exceeded.

17. The non-transitory computer readable storage medium as recited in claim 16, wherein the program instructions are further executable by a processor to assign pending tasks from the task queue out of order to reduce non-uniform heat generation on the system while preventing the thermal limits of the processing units from being exceeded.

18. The non-transitory computer readable storage medium as recited in claim 16, wherein the program instructions are further executable by a processor to adjust power states to the plurality of processing units when scheduling pending tasks to the plurality of processing units to reduce non-uniform heat generation on the system while preventing the thermal limits of the processing units from being exceeded.

19. The non-transitory computer readable storage medium as recited in claim 15, wherein the program instructions are further executable by a processor to:

generate a first product by multiplying a thermal metric of a first pending task by a thermal gradient of a first processing unit;

compare the first product to a thermal margin of the first processing unit; and

allow the first pending task to be scheduled to the first processing unit if the first product is less than or equal to the thermal margin of the first processing unit.

20. The non-transitory computer readable storage medium as recited in claim 15, wherein a thermal metric for a given task is calculated based on an analysis of instructions of the given task.