Graphics processing systems

Abstract

A graphics processing system that comprises a programmable processing unit operable to execute processing programs for execution threads corresponding to work items to be processed, and storage 74 in which a respective storage region can be allocated for temporary use by a respective group of execution threads corresponding to a group of work items being executed by the programmable processing unit while the group of execution threads are being executed. The graphics processing system further comprises one or more memory region “access permission” checking circuits 65A operable to prevent access to the storage for requests that are made for any requesters other than an execution thread of the work group for which the respective region of the storage has been allocated for use by to prevent data leaking between different work groups that are being processed at the same time.

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