ADVANCE READ CONTROL SYSTEM

摘要

PURPOSE:To prevent the deterioration of the processing seed of an information processing system by excluding completely the invalid advance reading actions with a channel controller and reducing the invalid load against a main memory. CONSTITUTION:The working of an advance reading control means 100 of a channel controller 1 is stopped when it is detected that a transfer request of data is given to an input/output controller 5b from a main memory 3 while this memory 3 is transferring (200) data to another input/output controller 5a. Therefore the means 100 works to carry out an advance reading action when the data are transferred continuously to the same input/output controller from the memory 3. However, the means 100 does not work when the data are transferred to different input/output controllers from the memory 3. As a result, the invalid advance reading actions are avoided and the reactive load of the memory 3 is reduced. Then the deterioration of the processing speed is prevented for an information processing system.