Method for reading data from a shared memory in a multiprocessor computer system

摘要

Method (T1-T13) for reading data in a computer system comprising a plurality of processors and a shared memory, at least one of the processors having a cache memory for storing corresponding data of the shared memory, the method comprising the steps of requesting (T1-T3) the reading of a data element from the shared memory by a requesting processor, reading (T4-T13) the requested data element from the shared memory and, in parallel, checking whether the requested data element is present in modified form in the cache memory of each processor other than the requesting processor, interrupting (T13) the reading of the requested data element from the shared memory if it is not ascertained (T11) that the requested data element is not present in modified form in the cache memory of any processor other than the requesting processor. IMAGE