International Business Machines Corporation

Apple Inc.

Donald R Desota

Terence M Potter

Benjiman L Goodman

Robert H Bell, Jr

Yoong Chert Foo

Venkat Rajeev Indukuru

Steven Paul Hartman

Winnie W Yeung

Rajendra D Panda

Joseph H Robichaux

Aroun Demeure

Cheng Li

Techniques are disclosed relating to cache footprint management. In some embodiments, execution circuitry is configured to perform operations for instructions from multiple threads in parallel. Cache circuitry may store information operated on by threads executed by the execution circuitry. Scheduling circuitry may arbitrate among threads to schedule threads for execution by the execution circuitry. Tracking circuitry may determine one or more performance metrics for the cache circuitry. Control circuitry may, based on the one or more performance metrics meeting a threshold, reduce a limit on a number of threads considered for arbitration by the scheduling circuitry, to control a footprint of information stored by the cache circuitry. Disclosed techniques may advantageously reduce or avoid cache thrashing for certain processor workloads.

Cache footprint management

According to one aspect of the present disclosure a system and computer program product for managing memory access is disclosed. The system includes a plurality of memory controllers each configured to maintain memory databus utilization by a corresponding processor at or below a threshold to maintain memory databus utilization of the system at or below a system threshold. The system also includes a service processor configured to receive memory databus utilization data from the memory controllers and programmed to, in response to determining that memory databus utilization for at least one of the processors is below its threshold, reallocate at least a portion of unused databus utilization from the at least one processor to at least one of the other processors.

Memory databus utilization management system and computer program product

Growing community of inventors

Liberty Hill, TX, United States of America

Donald R Desota