Information processing device, information processing method, and computer-readable information recording medium recorded with information processing program

• US 20070277177A1
• Filed: 05/29/2007
• Published: 11/29/2007
• Est. Priority Date: 05/29/2006
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kawamoto, Takuji
• Application Number:
  US11/806,002
• Publication Number:
  US 20070277177A1
• Time in Patent Office: Days
• US Class Current: 718/103
• CPC Class Codes: G06F 9/3851 from multiple instruction streams, e.g. multistreaming

Abstract

An object of the invention is to control the priorities of threads so that the respective threads optimize the information amount stored in a storage in an autonomous distributed manner, and to optimize the processing load of the entirety of a processing system without control overhead. The storage stores information therein. The CPU executes a thread including a writing operation of writing information into the storage, and a reading operation of reading the information from the storage. The CPU controls a priority of the thread based on an information amount stored in the storage in at least one of conditions when the writing operation has been executed, and when the reading operation has been executed.

Claims

1. An information processing device, comprising:

a storage for storing information therein;

a thread executor for executing a thread including a writing operation of writing information into the storage, and a reading operation of reading the information from the storage; and

a priority controller for controlling a priority of the thread based on an information amount stored in the storage in at least one of conditions when the writing operation has been executed by the thread executor, and when the reading operation has been executed by the thread executor.

2. The information processing device according to claim 1, wherein

the thread executor executes a plurality of sequential threads,

the writing operation and the reading operation are respectively included in the threads different from each other, and

the storage includes a plurality of storages each provided between the threads to be executed sequentially.

3. The information processing device according to claim 2, wherein

the thread executor executes the first thread including the writing operation, and executes the second thread including the reading operation, and

the priority controller compares the information amount stored in the storage with a predetermined reference amount, executes at least one of an operation of raising the priority of the first thread and an operation of lowering the priority of the second thread, if the information amount is smaller than the reference amount, executes at least one of an operation of lowering the priority of the first thread and an operation of raising the priority of the second thread, if the information amount is larger than the reference amount, and executes an operation of maintaining the current priority of the first thread and an operation of maintaining the current priority of the second thread, if the information amount is equal to the reference amount.

4. The information processing device according to claim 2, wherein

the thread executor executes the first thread including the writing operation, and executes the second thread including the reading operation, and

the priority controller compares the information amount stored in the storage with a predetermined first reference amount, and executes at least one of an operation of raising the priority of the first thread and an operation of lowering the priority of the second thread, if the information amount is smaller than the first reference amount, and

the priority controller compares the information amount with a predetermined second reference amount larger than the first reference amount, and executes at least one of an operation of lowering the priority of the first thread and an operation of raising the priority of the second thread, if the information amount is larger than the second reference amount.

5. The information processing device according to claim 1, wherein

the thread executor executes a first process, and a second process different from the first process,

the first process and the second process include a thread including a writing operation and a thread including a reading operation, respectively, and

the priority controller sets the priority of the thread included in the first process higher than the priority of the thread included in the second process, if a priority rank of the first process is higher than a priority rank of the second process.

6. The information processing device according to claim 1, wherein

the thread executor executes a first process, and a second process different from the first process,

the first process and the second process include a thread including a writing operation and a thread including a reading operation, respectively,

the priority includes a first priority level, and a second priority level higher than the first priority level, and

the priority controller sets the first priority level of the thread included in the first process higher than the first priority level of the thread included in the second process, and sets the second priority level of the thread included in the first process higher than the second priority level of the thread included in the second process, if a priority rank of the first process is higher than a priority rank of the second process.

7. The information processing device according to claim 2, wherein

the plurality of threads include the first thread of executing a first imaging operation, and the second thread of executing a second imaging operation with respect to a processing result of the first imaging operation.

8. The information processing device according to claim 1, wherein

the priority includes a first priority level, and a second priority level higher than the first priority level.

9. An information processing method, comprising:

a thread execution step of executing a thread including a writing operation of writing information into a storage, and a reading operation of reading the information from the storage; and

a priority control step of controlling a priority of the thread based on an information amount stored in the storage in at least one of conditions when the writing operation has been executed in the thread execution step, and when the reading operation has been executed in the thread execution step.

10. A computer-readable recording medium recorded with an information processing program which causes a computer to function as:

a storage for storing information therein;

a thread executor for executing a thread including a writing operation of writing information into the storage, and a reading operation of reading the information from the storage; and

a priority controller for controlling a priority of the thread based on an information amount stored in the storage in at least one of conditions when the writing operation has been executed by the thread executor, and when the reading operation has been executed by the thread executor.