Data processing system

摘要

A multiprocessor data processing system is described wherein the processor ( 12 a , 12 b , 12 c) communicate to each other via a shared memory ( 10 ). Each of the processors comprises an administration unit ( 18 a) and a computational unit ( 12 a). The administration unit of a writing processor ( 11 a) maintains information defining a section in the memory ( 10 ) which is free for storing data objects for readout by the reading processor ( 12 b). The administration unit ( 18 b) of the reading processor ( 11 b) maintains information defining a section in the memory ( 10 ) in which the writing processor has written completed data for the data objects. The processors are arranged to signal a message (M, M') to another processor via a processor synchronization channel for updating the information in the administration unit of said other processor. Each of the processors is arranged to suspend processing the stream of data objects when a location which it needs to access is outside the section defined by its administration unit.