Information processing device and computer program product

• US 8,990,521 B2
• Filed: 09/11/2012
• Issued: 03/24/2015
• Est. Priority Date: 11/24/2011
• Status: Expired due to Fees

• Current Assignee: Kioxia Corporation
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Ishihara, Takeshi, Tanizawa, Yoshimichi, Ise, Kotaro
• Primary Examiner(s): BATAILLE, PIERRE MICHE
• Application Number:
  US13/609,920
• Publication Number:
  US 20130138900A1
• Time in Patent Office: 924 Days
• Field of Search: 711/158, 711/163, 711/170, 711/E12.001, 713/324, 713/340
• US Class Current: 711/158
• CPC Class Codes: G06F 12/0638 Combination of memories, e.g. ROM and RAM such as to permit replacement or supplementing of words in one module by words in another module address formation of the next microinstruction G06F9/26; masking faults in memories by using spares or by reconfiguring G11C29/70
• CPC Class Codes: G06F 2212/1028 Power efficiency
• CPC Class Codes: G06F 3/0625 Power saving in storage systems
• CPC Class Codes: G06F 3/0685 Hybrid storage combining heterogeneous device types, e.g. hierarchical storage, hybrid arrays
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

According to an embodiment, an information processing device that includes a first storage unit and a second storage unit having power consumption different from that of the first storage unit. The information processing device also includes a control unit configured to make a control to determine a priority of information that is to be stored in the first storage unit or the second storage unit. The control unit is configured to store the information into the first storage unit or into the second storage unit based on the determined priority.

Claims

1. An information processing device comprising:

a first storage unit;

a second storage unit having power consumption different from that of the first storage unit; and

a control unit configured to perform control to determine a priority of information that is to be stored in the first storage unit or the second storage unit, and to store the information into the first storage unit or into the second storage unit based on the determined priority, wherein

the second storage unit has power consumption in a non-access state lower than the power consumption of the first storage unit in a non-access state, and

the control unit performs control to store the information having a predetermined first priority or higher into the first storage unit and performs control to store the information having a lower priority than the first priority into the second storage unit.

2. The device according to claim 1, wherein

the first storage unit is a volatile memory, and

the second storage unit is a non-volatile memory.

3. The device according to claim 1, wherein

the control unit includes a determination unit configured to determine the priority based on a reference frequency of the information so that the higher the reference frequency of the information, the higher the priority.

4. The device according to claim 1, wherein

the control unit includes a determination unit configured to determine the priority based on a degree of importance so that the lower a degree of importance of the information, the higher the priority.

5. The device according to claim 1, wherein

the control unit includes a state control unit configured to control a state of each of the first storage unit and the second storage unit, wherein

after performing control to change the second storage unit to an active state from an inactive state, the state control unit performs control to store the information into the second storage unit, and after performing control to store the information into the second storage unit, the state control unit performs control to change the second storage unit to the inactive state from the active state.

6. The device according to claim 5, wherein the control unit performs control to keep the first storage unit in the active state after performing control to store the information into the first storage unit.

7. The device according to claim 6, wherein

the state control unit performs control to determine that all processes to the information stored in the first storage unit are completed, and to change the first storage unit to the inactive state from the active state when determining that all processes are completed.

8. The device according to claim 1, wherein

the control unit includes a state control unit configured to control a state of each of the first storage unit and the second storage unit, wherein

after performing control to change the first storage unit to an active state from an inactive state, the state control unit performs control to store the information into the first storage unit, and after performing control to store the information into the first storage unit, the state control unit performs control to change the first storage unit to the inactive state from the active state.

9. The device according to claim 1, further comprising a reception unit configured to receive the information, wherein

the control unit includes a state control unit configured to control a state of each of the first storage unit and the second storage unit, and

the state control unit performs control to keep the second storage unit in an active state when the reception unit receives the information at an interval less than a predetermined time, and performs control to change the second storage unit to an inactive state from the active state when the reception unit receives the information at an interval not less than the predetermined time.

10. A computer program product comprising a computer-readable medium containing a program executed by a computer that includes a first storage unit and a second storage unit having power consumption different from that of the first storage unit, the program causing the computer to execute:

determining a priority of information that is to be stored in the first storage unit or the second storage unit; and

storing the information into the first storage unit or into the second storage unit based on the determined priority, wherein

the second storage unit has power consumption in a non-access state lower than the power consumption of the first storage unit in a non-access state, and

the determining performs control to store the information having a predetermined first priority or higher into the first storage unit and performs control to store the information having a lower priority than the first priority into the second storage unit.