A WRITE-ONLY DATALESS STATE FOR MAINTAINING CACHE COHERENCY

Systems and methods for maintaining cache coherency in a multiprocessor system with shared memory, including a write-data-invalid (WDI) state configured to reduce stalls during write operations. The WDI state is a dataless state with guaranteed write permissions. When a first processor of the multip...

Full description

Saved in:
Bibliographic Details
Main Authors KOOB, Christopher Edward, VANTREASE, Dana M
Format Patent
LanguageEnglish
French
German
Published 13.03.2019
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:Systems and methods for maintaining cache coherency in a multiprocessor system with shared memory, including a write-data-invalid (WDI) state configured to reduce stalls during write operations. The WDI state is a dataless state with guaranteed write permissions. When a first processor of the multiprocessor system makes a write request for a first cache entry of a first cache, the WDI state associated with the first cache entry includes write permissions for the write to directly proceed to one or more higher levels of memory in the shared memory, such that delays associated with obtaining write permissions is reduced at the first cache. The WDI state is treated as an invalid state for a read request to the first cache entry by the first processor.
Bibliography:Application Number: EP20130721445