Information processing apparatus and information processing method

An information processing method for use with an information processing apparatus for reading data in packet units from a plurality of queues provided in a memory in accordance with DMA (Direct Memory Access), the information processing method comprising:

• generating groups of descriptors associated with corresponding ones of the queues;
• assigning, to corresponding registers, values identifying the descriptors within the generated descriptor groups, the registers being associated with corresponding ones of the queues;
• obtaining descriptors from the descriptor groups based on corresponding register values, the obtained descriptors identifying data associated with corresponding ones of the queues;
• extracting position information from a selected one of the descriptors and reading data in packet units from the memory in accordance with DMA on the basis of the extracted position information, wherein an interrupt processor performs a predetermined interrupt process when the interrupt processor is notified of the completion of the DMA from an interrupt controller;
• and
• transmitting a plurality of pieces of transmission data in such a manner as to correspond to a transmission rate and a priority that are set in each piece of transmission data,
• wherein the assigning comprises:
• assigning, using a hardware controller, values to a first one of the registers associated with a corresponding first queue at predetermined intervals;
• and
• assigning values to a second one of the registers associated with a corresponding second queue in response to information indicating the generation of a descriptor group associated with the second queue, a priority of data associated with the first queue exceeding a priority of data associated with the second queue.

A tangible, non-transitory computer-readable medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform a method for use with an information processing apparatus for reading data in packet units from a plurality of queues provided in a memory in accordance with DMA (Direct Memory Access), the method comprising:

• generating groups of descriptors associated with corresponding ones of the queues;
• assigning, to corresponding registers, values identifying the descriptors within the generated descriptor groups, the registers being associated with corresponding ones of the queues;
• obtaining descriptors from the descriptor groups based on corresponding register values, the obtained descriptors identifying data associated with corresponding ones of the queues;
• extracting position information from a selected one of the descriptors and reading data in packet units from the memory in accordance with DMA on the basis of the extracted position information, wherein an interrupt processor performs a predetermined interrupt process when the interrupt processor is notified of the completion of the DMA from an interrupt controller;
• and
• transmitting a plurality of pieces of transmission data in such a manner as to correspond to a transmission rate and a priority that are set in each piece of transmission data,
• wherein the assigning comprises:
• assigning, using a hardware controller, values to a first one of the registers associated with a corresponding first queue at predetermined intervals;
• and
• assigning values to a second one of the registers associated with a corresponding second queue in response to information indicating the generation of a descriptor group associated with the second queue, a priority of data associated with the first queue exceeding a priority of data associated with the second queue.