University of Michigan

Ankit Sethia

Scott Mahlke

A multithreaded data processing system performs processing using resource circuitry which is a finite resource. A saturation signal is generated to indicate when the resource circuitry is no longer able to perform processing operations issued to it. This saturations signal may be used to select a scheduling algorithm to be used for further scheduling, such as switching to scheduling from a single thread as opposed to round-robin scheduling from all of the threads. Re-execution queue circuitry is used to queue processing operations which have been enabled to be issued so as to permit other processing operations which may not be blocked by the lack of use of circuitry to attempt issue.

Issue control for multithreaded processing

This follows a data processing system comprising multiple GPUs includes instruction queue circuitry storing data specifying program instructions for threads awaiting issue for execution. Instruction characterization circuitry determines one or more characteristics of the program instructions awaiting issue within the instructional queue circuitry and supplies this to operating parameter control circuitry. The operating parameter control circuitry alters one or more operating parameters of the system in response to the one or more characteristics of the program instructions awaiting issue.

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Ann Arbor, MI, United States of America

Ankit Sethia