Information processing apparatus, storage device, and computer program product

A storage device comprising:

• a controller configured to control reading and writing of data performed by a processing device that is configured to execute an application using first data;
• a first memory;
• and
• a second memory configured to store the first data, the second memory having an access latency of reading and writing of data higher than that of the first memory, wherein
• the first data includes a first page and a second page, the first page being read or written a number of times equal to or more than a threshold in a certain period that is shorter than a processing period for executing the application, the second page being read or written a number of times less than the threshold in the certain period,
• the controller includes an operating system configured to receive a request to read or write a page included in the first data from the application and configured to perform control according to the received request, and
• the operating system is configured to
• execute first access of performing movement processing to move the first page to the first memory and then reading or writing data from or to the first page moved to the first memory, and
• execute second access of directly reading or writing data from or to the second page of the second memory.

A computer program product comprising a non-transitory computer-readable medium containing a program, wherein when executed by a computer that includes a processing device configured to execute an application using first data, a first memory, and a second memory configured to store the first data the second memory having an access latency of reading and writing of data higher than that of the first memory, the first data including a first page and a second page, the first page being read or written a number of times equal to or more than a threshold in a certain period that is shorter than a processing period for executing the application, the second page being read or written a number of times less than the threshold in the certain period, the program causes the computer to execute:

• receiving a request to read or write a page included in the first data from the application and performing control according to the received request, wherein the performing control includes:
• executing first access of performing movement processing to move the first page to the first memory and then reading or writing data from or to the first page moved to the first memory;
• and
• executing second access of directly reading or writing data from or to the second page of the second memory.

An information processing apparatus comprising:

• a processing device configured to execute an application using first data that includes a plurality of pages;
• a first memory;
• and
• a second memory configured to store the first data, the second memory having an access latency of reading and writing of data higher than that of the first memory, wherein
• the processing device includes an operating system configured to receive a request to read or write a page included in the first data from the application and configured to perform control according to the received request, and
• the operating system is configured to execute, in reading or writing the first data, both first access of performing movement processing to move a page included in the first data in the second memory to the first memory and then reading or writing data from or to the page moved to the first memory and second access of directly reading or writing data from or to the second memory so that a ratio of an amount of data read from or written to the page moved to the first memory relative to an amount of data transfer between the first memory and the second memory that occurs along with the first access is larger than a ratio of an amount of data read from or written to the page moved to the first memory relative to an amount of data transfer between the first memory and the second memory that occurs when the whole first data is read or written by execution of the first access.

An information processing apparatus comprising:

• a processing device configured to execute an application using first data that includes a plurality of pages;
• a first memory;
• and
• a second memory configured to store the first data, the second memory having an access latency of reading and writing of data higher than that of the first memory, wherein
• the processing device includes an operating system configured to receive a request to read or write a page included in the first data from the application and configured to perform control according to the received request, and
• the operating system is configured to execute, in reading or writing the first data, both first access of performing movement processing to move a page included in the first data in the second memory to the first memory and then reading or writing data from or to the page moved to the first memory and second access of directly reading or writing data from or to the second memory so that a sum of a power consumption of the first memory and a power consumption of the second memory is smaller than a sum of a power consumption of the first memory and a power consumption of the second memory generated when the whole first data in the second memory is read or written by execution of the first access.