Program processing apparatus and method, and image forming apparatus

• US 10,324,667 B2
• Filed: 02/18/2016
• Issued: 06/18/2019
• Est. Priority Date: 03/09/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Sakai, Katsuya
• Primary Examiner(s): Patel, Hiren P
• Application Number:
  US15/046,583
• Publication Number:
  US 20160266933A1
• Time in Patent Office: 1,216 Days
• CPC Class Codes: G06F 3/122 with regard to computing resources, e.g. memory, CPU
• CPC Class Codes: G06F 9/5033 considering data affinity
• CPC Class Codes: G06K 15/1857 involving parallel processing in the same printing apparatus

Abstract

Threads that are generated during specific processing are managed, with an operation core of threads that are generated during activation processing being fixed to a specific core, and an operation core of threads for specific processing that are generated after the activation processing is complete not being set. Also, the setting of the operation core of threads for specific processing that were generated before the timing at which the activation processing is completed is restored to an original setting.

Claims

1. A program processing apparatus that executes a plurality of threads, comprising:

a memory storing a control program; and

a multi-core processor that includes a plurality of processor cores and respective caches for the plurality of processor cores, wherein when the control program is executed by the multi-core processor it causes the multi-core processor to perform a method comprising;

storing an identifier of a generated thread;

setting an operation state to be an activation processing state, when a specific program starts activation processing of an application program, and setting the operation state to be an activation processing complete state, after completion of the activation processing of an application program that is being executed, wherein the application program continues to execute after the activation processing state completes; and

while the operation state is the activation processing state, fixedly allocating a generated thread of the specific program to a specific processor core, and after the operation state is set to the activation processing complete state, allocating the generated thread of the specific program to a plurality of processor cores determined by an operating system,

wherein the same data is not cached in the respective caches for the plurality of processor cores by fixedly allocating the generated thread of the specific program to the specific processor core while the operation state is the activation processing state.

2. The program processing apparatus according to claim 1, wherein the specific program is a virtual machine that executes the application program.

3. The program processing apparatus according to claim 2, wherein the virtual machine is a Java virtual machine, and the application program is a Java application.

4. The program processing apparatus according to claim 1, wherein the specific processor core is a specific one of the plurality of processor cores.

5. An image processing apparatus comprising:

a program processing device configured to execute a plurality of threads, the program processing device including;

a memory storing a control program; and

a multi-core processor that includes a plurality of processor cores and respective caches for the plurality of processor cores, wherein when the control program is executed by the multi-core processor it causes the multi-core processor to perform a method comprising;

storing an identifier of a generated thread;

setting an operation state to be an activation processing state, when a specific program starts activation processing of an application program, and setting the operation state to be an activation processing complete state, after completion of the activation processing of an application program that is being executed, wherein the application program continues to execute after the activation processing state completes; and

while the operation state is the activation processing state, fixedly allocating a generated thread of the specific program to a specific processor core, and after the operation state is set to the activation processing complete state, allocating the generated thread of the specific program to a plurality of processor cores determined by an operating system;

wherein the same data is not cached in the respective caches for the plurality of processor cores by fixedly allocating the generated thread of the specific program to the specific processor core while the operation state is the activation processing state;

a printer configured to print an image;

a scanner; and

a control unit configured to provide an interface between the scanner, the printer and an application program that is executed by the program processing device.

6. A program processing method for executing a plurality of threads with a multi-core processor that includes a plurality of processor cores and respective caches for the plurality of processor cores, comprising:

storing an identifier of a generated thread;

setting an operation state to be an activation processing state, when a specific program starts activation processing of an application program, and setting the operation state to be an activation processing complete state, after completion of the activation processing of an application program that is being executed, wherein the application program continues to execute after the activation processing state completes; and

while the operation state is the activation processing state, fixedly allocating a generated thread of the specific program to a specific processor core, and after the operation state is set to the activation processing complete state, allocating the generated thread of the specific program to a plurality of processor cores determined by an operating system,

wherein the same data is not cached in the respective caches for the plurality of processor cores by fixedly allocating the generated thread of the specific program to the specific processor core while the operation state is the activation processing state.

7. The program processing method according to claim 6, wherein the specific program is a virtual machine that executes the application program.

8. The program processing method according to claim 7, wherein the virtual machine is a Java virtual machine, and the application program is a lava application.

9. The program processing method according to claim 6, wherein the specific processor core is a specific one of the plurality of processor cores.

10. A non-transitory computer-readable medium storing a program for causing a computer that executes a plurality of threads using a multi-core processor that includes a plurality of processor cores and a respective caches for the plurality of processor cores to execute a process, the process comprising:

storing an identifier of a generated thread;

setting an operation state to be an activation processing state, when a specific program starts activation processing of an application program, and setting the operation state to be an activation processing complete state, after completion of the activation processing of an application program that is being executed, wherein the application program continues to execute after the activation processing state completes; and

while the operation state is the activation processing state, fixedly allocating a generated thread of the specific program to a specific processor core, and after the operation state is set to the activation processing complete state, allocating the generated thread of the specific program to a plurality of processor cores determined by an operating system,

wherein the same data is not cached in the respective caches for the plurality of processor cores by fixedly allocating the generated thread of the specific program to the specific processor core while the operation state is the activation processing state.

11. The non-transitory computer-readable medium according to claim 10,

wherein the specific program is a virtual machine that executes the application program.

12. The non-transitory computer-readable medium according to claim 10, wherein the specific processor core is a specific one of the plurality of processor cores.

13. The non-transitory computer-readable medium according to claim 11, wherein the virtual machine is a Java virtual machine, and the application program is a Java application.