Memory management method
First Claim
1. A method for managing main memory comprising DRAM and NVRAM in a computer depending on a transition of an operation state of the computer, the method comprising:
- upon start of the computer, loading at least one of a first program and a first data into the DRAM, and loading at least one of a second program and a second data into the NVRAM;
in a state transition from a normal operation of the computer to a suspend state of the computer, moving the first data in the DRAM to the NVRAM on a page basis;
in a state transition from the suspend state of the computer to the normal operation of the computer, reading the first data from the NVRAM on a page basis for program execution by the computer;
in the case where a first data write to the NVRAM on a page basis occurs while reading the first data from the NVRAM on a page basis, stopping the first data write, and moving the first data in a data area of the NVRAM subjected to the first data write, to the DRAM on a page basis;
performing the first data write on a page basis to the DRAM to which the first data has been moved;
detecting a first use state of the DRAM; and
moving a page in the DRAM that has not been read for a first time and has not been written for a second time to the NVRAM responsive to detecting the first use state of the DRAM.
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Accused Products
Abstract
A method for managing main memory including DRAM and NVRAM in a computer depending on the operation state of the computer is provided. The method includes: (a) upon start of the computer, loading a program and the like into the DRAM, and loading predetermined read-only data and the like into the NVRAM; (b) in a state transition from a normal operation to a suspend state, moving data in the DRAM to the NVRAM; (c) in a state transition from the suspend state to the normal operation, reading data from the NVRAM for program execution; (d) in the case where a data write to the NVRAM occurs, stopping the data write, and moving data in a data area of the NVRAM subjected to the data write, to the DRAM; and (e) performing the data write to the DRAM to which the data has been moved.
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Citations
16 Claims
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1. A method for managing main memory comprising DRAM and NVRAM in a computer depending on a transition of an operation state of the computer, the method comprising:
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upon start of the computer, loading at least one of a first program and a first data into the DRAM, and loading at least one of a second program and a second data into the NVRAM; in a state transition from a normal operation of the computer to a suspend state of the computer, moving the first data in the DRAM to the NVRAM on a page basis; in a state transition from the suspend state of the computer to the normal operation of the computer, reading the first data from the NVRAM on a page basis for program execution by the computer; in the case where a first data write to the NVRAM on a page basis occurs while reading the first data from the NVRAM on a page basis, stopping the first data write, and moving the first data in a data area of the NVRAM subjected to the first data write, to the DRAM on a page basis; performing the first data write on a page basis to the DRAM to which the first data has been moved; detecting a first use state of the DRAM; and moving a page in the DRAM that has not been read for a first time and has not been written for a second time to the NVRAM responsive to detecting the first use state of the DRAM. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computer program product for managing main memory comprising DRAM and NVRAM in a computer depending on a transition of an operation state of the computer, the computer program product comprising at least one computer readable non-transitory storage medium having computer readable program instructions thereon for execution by a processor, the computer readable program instructions comprising program instructions for:
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upon start of the computer, loading at least one of a first program and a first data into the DRAM, and loading at least one of a second program and a second data into the NVRAM; in a state transition from a normal operation of the computer to a suspend state of the computer, moving the first data in the DRAM to the NVRAM on a page basis; in a state transition from the suspend state of the computer to the normal operation of the computer, reading the first data from the NVRAM on a page basis for program execution by the computer; in the case where a first data write to the NVRAM on a page basis occurs while reading the first data from the NVRAM on a page basis, stopping the first data write, and moving the first data in a data area of the NVRAM subjected to the first data write, to the DRAM on a page basis; performing the first data write on a page basis to the DRAM to which the first data has been moved; detecting a first use state of the DRAM; and moving a page in the DRAM that has not been read for a first time and has not been written for a second time to the NVRAM responsive to detecting the first use state of the DRAM. - View Dependent Claims (10)
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11. A computer system for managing main memory comprising DRAM and NVRAM in a computer depending on a transition of an operation state of the computer, the computer system comprising:
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at least one processor; at least one computer readable memory; at least one computer readable tangible, non-transitory storage medium; and program instructions stored on the at least one computer readable tangible, non-transitory storage medium for execution by the at least one processor via the at least one computer readable memory, wherein the at least one computer readable memory includes the main memory comprising DRAM and NVRAM, and wherein the program instructions comprise program instructions for; upon start of the computer, loading at least one of a first program and a first data into the DRAM, and loading at least one of a second program and a second data into the NVRAM; in a state transition from a normal operation of the computer to a suspend state of the computer, moving the first data in the DRAM to the NVRAM on a page basis; in a state transition from the suspend state of the computer to the normal operation of the computer, reading the first data from the NVRAM on a page basis for program execution by the computer; in the case where a first data write to the NVRAM on a page basis occurs while reading the first data from the NVRAM on a page basis, stopping the first data write, and moving the first data in a data area of the NVRAM subjected to the first data write, to the DRAM on a page basis; performing the first data write on a page basis to the DRAM to which the first data has been moved; detecting a first use state of the DRAM; and moving a page in the DRAM that has not been read for a first time and has not been written for a second time to the NVRAM responsive to detecting the first use state of the DRAM. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification