Multi-CPUs support with thread priority control

• US 7,207,040 B2
• Filed: 08/15/2002
• Issued: 04/17/2007
• Est. Priority Date: 08/15/2002
• Status: Active Grant

• Current Assignee: Oracle America, Inc. (Oracle Corporation), Trimble Navigation Limited (Trimble Inc.)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Zhang, Weiqiang, Boudnik, Konstantin I.
• Primary Examiner(s): An; Meng Al T.
• Assistant Examiner(s): To; Jennifer N.
• Application Number:
  US10/222,535
• Publication Number:
  US 20040034856A1
• Time in Patent Office: 1,706 Days
• Field of Search: 718100-108, 718/1, 709201-203, 709204-244, 455/414, 719/328, 719/313, 719/318, 717/127, 710/244
• US Class Current: 718/103
• CPC Class Codes: G06F 2209/5013 Request control
• CPC Class Codes: G06F 2209/5015 Service provider selection
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548
• CPC Class Codes: G06F 9/4881 Scheduling strategies for dispatcher, e.g. round robin, multi-level priority queues
• CPC Class Codes: G06F 9/5027 the resource being a machine, e.g. CPUs, Servers, Terminals

Abstract

An invention is provided for affording thread priority control in a distributed computer system. At least one task is executed on a server, where each task includes a task identifier and a priority value. In addition, a change priority message, which includes priority value and a task identifier, is received over a network. In response, the priority value of a specific task having the same task identifier as the task identifier of the change priority message is set equal to the priority value of the change priority message. As a result, the specific task is executed at a priority level relative to the priority value of the specific task.

Claims

1. A method for providing thread priority control in a distributed computer system, comprising the method operations of:

executing at least one task of a plurality of tasks on a server in communication with a network, each task including a task identifier and a priority value to enable thread priority control, each task also including a change priority method that functions to set the priority value of the task to a specific priority value and accepts the specific priority value as an argument;

receiving a change priority message remotely over the network, the change priority message including a priority value and a task identifier; and

setting the priority value of a specific task of the at least one task being executed on the server in communication with the network and having the same task identifier as the task identifier of the change priority message, equal to the priority value of the change priority message, wherein the specific task is executed with allocated resources determined by the priority value of the change priority message relative to other tasks of the plurality of tasks executing in parallel in the distributed computer system.

2. A method as recited in claim 1, wherein the change priority method further communicates with a local Java Virtual Machine to adjust computer resource allocation.

3. A method as recited in claim 2, further comprising the operation of calling the change priority method of the specific task using the priority value of the change priority message.

4. A method as recited in claim 1, wherein the server is part of a server farm, the server farm having a plurality of servers controlled using a control system server.

5. A method as recited in claim 4, wherein the change priority message is sent from a separate server on the server farm.

6. A method as recited in claim 4, wherein the change priority message is sent from the control system server.

7. A system for providing thread priority control in a distributed computer system, comprising:

a first server in communication with a network, the first server executing at least one task of a plurality of tasks, each task including a task identifier and a priority value, each task also including a change priority method that functions to set the priority value of the task to a specific priority value and accents the specific priority value as an argument; and

a second server, in communication with the network, capable of transmitting a change priority message to the first server remotely via the network, the change priority message including a priority value and a task identifier,

wherein the first server sets the priority value of a specific task of the at least one task executing on the first server and having the same task identifier as the task identifier of the change priority message, equal to the priority value of the change priority message, and wherein the specific task is executed with allocated resources determined by the priority value of the change priority message relative to other tasks of the plurality of tasks executing in parallel in the distributed computer system.

8. A system as recited in claim 7, wherein the change priority method further communicates with a Java Virtual Machine present on the first server to adjust computer resource allocation.

9. A system as recited in claim 8, wherein the change priority method of the specific task is called using the priority value of the change priority message as an argument.

10. A system as recited in claim 7, further comprising a lookup service, the lookup service having server entries for the first server and the second server, each entry including a list of attributes corresponding to the related server.

11. A system as recited in claim 10, wherein each entry of the lookup service includes miscellaneous prevention attributes related to tasks executing on the related server.

12. A system as recited in claim 11, wherein tasks having matching miscellaneous prevention attributes are not executed in parallel on a single server.