Patent ID: 7730247

Claim:
An information processing apparatus for connecting a plurality of transfer originator bus control units, each of which is configured to send transfer information, and a plurality of transfer destination bus control units, each of which is configured to receive the transfer information, the apparatus comprising: a plurality of command buffers, each of which is connected to a corresponding one of the plurality of transfer originator bus control units, and is configured to store precedent transfer information; a hierarchical bus for connecting the plurality of transfer originator bus control units to the plurality of transfer destination bus control units; a plurality of command arbiters, each of which is connected to a corresponding one of the plurality of transfer destination bus control units, and is configured to perform contention control of the transfer information; a system arbiter connected to the plurality of command arbiters and the plurality of command buffers, and configured to manage the contention control of the plurality of command arbiters, wherein the system arbiter is further configured to change priority of the transfer information in at least one of the plurality of command arbiters based on a status of the plurality of command buffers.