Information processing apparatus and method for controlling information processing apparatus restoration order of images that reduces the waiting time when restoration from a hibernation state

A method for controlling an information processing apparatus including a first storage unit in which an operating system that executes first and processes and first and second execution programs of the first and second processes are loaded, the method comprising:

• in a case where the information processing apparatus shifts into a power saving state in which power is not supplied to a device included in the information processing apparatus, storing, in a second storage unit of the information processing apparatus, execution status information of the operating system loaded in said first storage unit, execution status information of the first process, and execution status information of the second process;
• determining an order of restoring the first process and the second process based on a factor by which the information processing apparatus returns from the power saving state;
• in a case where the information processing apparatus returns from the power saving state, transferring the execution status information of the operating system from the second storage unit to the first storage unit, and restoring the operating system to a state of execution using the execution status information transferred to the first storage unit;
• and
• transferring, in accordance with the order determined in the determining step, the execution status information of the first process and the execution status information of the second process from the second storage unit to the first storage unit, restoring the first process to a state of execution using the execution status information of the first process transferred to the first storage unit before completion of transferring the execution status information of the second process, and restoring the second process to a state of execution using the execution status information of the second process transferred to the first storage unit after the first process has been restored,
• wherein the operating system includes a virtual memory function that divides a storage region of the first storage unit into pages, each page being a region that is a predetermined storage capacity, and uses the pages and a part of a storage region of the second storage unit as the storage region of the first storage unit based on a page table for each process for managing position information of a page that is used, and
• wherein the second storage unit stores the execution status information of the first process and the execution status information of the second process in units of pages.

An information processing apparatus which can shift into a power saving state, the information processing apparatus comprising:

• a main storage unit in which an operating system that can execute a plurality of processes is loaded;
• a non-volatile storage unit that stores execution statuses of the plurality of processes executed by the operating system loaded in said main storage unit;
• a control unit that, in a case of causing the information processing apparatus to shift into the power saving state, saves the execution statuses of the plurality of processes from said main storage unit to said non-volatile storage unit;
• and
• a determination unit that determines an order of restoring the plurality of processes based on a factor by which the information processing apparatus is resumed from the power saving state,
• wherein, in a case of causing the information processing apparatus to resume from the power saving state, said control unit further transfers the execution statuses of the plurality of processes in accordance with the order determined in the determining step one by one to said main storage unit, and further resumes execution of a process from a process for which transfer of an execution status is complete,
• wherein the operating system further includes a virtual memory function that divides a storage region of said main storage unit in units of pages, the page unit being a region obtained by performing division that is a predetermined storage capacity, and uses the pages, and uses a part of a storage region of said non-volatile storage unit as the storage region of said main storage unit based on a page table for each process for managing position information of a page that is used, and
• wherein, in a case of causing the information processing apparatus to shift into the power saving state, said control unit saves the execution status information of each process from said main storage unit to said non-volatile storage unit in units of pages.

A method for controlling an information processing apparatus which can shift into a power saving state, the method comprising:

• loading, in a main storage unit, an operating system that can execute a plurality of processes;
• in a case of causing the information processing apparatus to shift into the power saving state, saving execution statuses of the plurality of processes executed by the operating system loaded in the main storage unit from the main storage unit to a non-volatile storage unit,
• determining an order of restoring the plurality of processes based on a factor by which the information processing apparatus is resumed from the power saving state;
• and
• in a case of causing the information processing apparatus to resume from the power saving state, transferring the execution statuses of the plurality of processes in accordance with the order determined in the determining step one by one to the main storage unit, and resuming execution of a process from a process for which transfer of an execution status is complete,
• wherein the operating system further includes a virtual memory function that divides a storage region of the main storage unit in units of pages, the page unit being a region obtained by performing division that is a predetermined storage capacity, and uses the pages, and uses a part of a storage region of the non-volatile storage unit as the storage region of the main storage unit based on a page table for each process for managing position information of a page that is used, and
• wherein, in a case of causing the information processing apparatus to shift into the power saving state, said saving step saves the execution status information of each process from the main storage unit to the non-volatile storage unit in units of pages.