Information processing apparatus, method, and computer readable medium

Patent metadata

Field	Value
Publication number	US-2016357656-A1
Application number	US-201615154186-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	Jun 2, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

An acquire an integrated value of count values and first information at every specific timing, the integrated value of count values being acquired by counting a number of events generated when a program is executed, and the first information being operation information that includes identification information of the program or information of hardware that is used to execute the program, temporarily store the integrated value and the first information in a first area of a memory, select, when a newly acquired integrated value exceeds a threshold, one of the first information stored in the first area and second information which is operation information corresponding to the newly acquired integrated value, based on the newly acquired integrated value, the integrated value which is stored in the first area, and the threshold, and store the selected information in a second area of the memory.

First claim

What is claimed is:

1 . An information processing apparatus comprising:
a memory; and a processor coupled to the memory and configured to: acquire an integrated value of count values and first information at every specific timing, the integrated value of count values being acquired by counting a number of events generated when a program is executed by the information processing apparatus, and the first information being operation information that includes identification information of the program when the integrated value is acquired or information of hardware that is used to execute the program, temporarily store the integrated value and the first information in a first area of the memory, select, when a newly acquired integrated value exceeds a threshold, one of the first information stored in the first area and second information which is operation information corresponding to the newly acquired integrated value, based on the newly acquired integrated value, the integrated value which is stored in the first area, and the threshold, and store the selected information in a second area of the memory.

2 . The information processing apparatus according to claim 1 ,
wherein the processor is configured to select one of the first information and the second information according to comparison of a first difference and a second difference, the first difference being a difference between the threshold and a previous integrated value which is stored in the first area, and the second difference being a difference between the threshold and a newly acquired integrated value.

3 . The information processing apparatus according to claim 2 ,
wherein the processor is configured to: select the first information in a case where the first difference is smaller than the second difference, and select the second information in a case where the first difference is equal to or larger than the second difference.

4 . The information processing apparatus according to claim 1 ,
wherein the first information is information which is acquired at a timing immediately before a timing in which the second information is acquired among timings of the every specific timing.

5 . The information processing apparatus according to claim 2 ,
wherein the processor is configured to correct the first information or the second information using the integrated value and the threshold.

6 . The information processing apparatus according to claim 5 ,
wherein the processor is configured to correct the first information or the second information using a ratio of a difference between the threshold and the previous integrated value to a difference between the newly acquired integrated value and the previous integrated value.

7 . The information processing apparatus according to claim 6 ,
wherein the first information and the second information include address values indicated by a program counter, and wherein the processor is configured to correct the address values using the ratio.

8 . The information processing apparatus according to claim 5 ,
wherein the first information and the second information include pieces of identification information of processes, which are executed by the program, and the address values indicated by the program counter, and wherein the processor is configured to select whether or not to correct the address values according to comparison of the pieces of identification information of the processes which are included in the first information and the second information.

9 . The information processing apparatus according to claim 8 ,
wherein the processor is configured to perform correction in a case where the pieces of identification information of the processes included in the first information and the second information coincide with each other.

10 . The information processing apparatus according to claim 1 ,
wherein the processor is configured to subtract value of the threshold from the integrated value when the integrated value exceeds the threshold.

11 . The information processing apparatus according to claim 1 ,
wherein the counter is a counter which does not have a hardware interruption function, and wherein the processor is configured to receive hardware interruption from another counter at every specific timing, and acquire the integrated value when the hardware interruption is received.

12 . A method comprising:
acquiring, by a processor, an integrated value of count values and first information at every specific timing, the integrated value of count values being acquired by counting a number of events generated when a program is executed by the information processing apparatus, and the first information being operation information that includes identification information of the program when the integrated value is acquired or information of hardware that is used to execute the program; temporarily storing, by the processor, the integrated value and the first information in a first area of a memory; selecting, by the processor and when a newly acquired integrated value exceeds a threshold, one of the first information stored in the first area and second information which is operation information corresponding to the newly acquired integrated value, based on the newly acquired integrated value, the integrated value which is stored in the first area, and the threshold; and storing, by the processor, the selected information in a second area of the memory.

13 . The method according to claim 12 , further comprising:
selecting, by the processor, one of the first information and the second information according to comparison of a first difference and a second difference, the first difference being a difference between the threshold and a previous integrated value which is stored in the first area, and the second difference being a difference between the threshold and a newly acquired integrated value.

14 . The method according to claim 13 , further comprising:
selecting, by the processor, the first information in a case where the first difference is smaller than the second difference; and selecting, by the processor, the second information in a case where the first difference is equal to or larger than the second difference.

15 . The method according to claim 12 , wherein
the first information is information which is acquired at a timing immediately before a timing in which the second information is acquired among timings of the every specific timing.

16 . The method according to claim 13 , further comprising:
correcting, by the processor, the first information or the second information using the integrated value and the threshold.

17 . The method according to claim 16 , further comprising:
correcting, by the processor, the first information or the second information using a ratio of a difference between the threshold and the previous integrated value to a difference between the newly acquired integrated value and the previous integrated value.

18 . The method according to claim 17 , wherein
the first information and the second information include address values indicated by a program counter, and the method further comprising correcting the address values using the ratio.

19 . The method according to claim 16 , wherein
the first information and the second information include pieces of identification information of processes, which are executed by the program, and the address values indicated by the program counter, and the method further comprising selecting, by

Assignees

• Fujitsu Ltd

Inventors

• Yamamoto Masao

Classifications

• G06F11/302

  where the computing system component is a software system · CPC title

• G06F11/3476

  Data logging (G06F11/14, G06F11/2205 take precedence) · CPC title

• G06F13/1673

  using buffers · CPC title

• G06F2201/81

  Threshold · CPC title

• G06F11/3495 Primary

  for systems · CPC title