The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2002
Filed:
Jun. 18, 1998
Rahul Razdan, Princetown, MA (US);
James B. Keller, Waltham, MA (US);
Richard E. Kessler, Shrewsbury, MA (US);
Compaq Information Technologies Group, L.P., Houston, TX (US);
Abstract
A multiprocessor system includes a plurality of processors, each processor having one or more caches local to the processor, and a memory controller connectable to the plurality of processors and a main memory. The memory controller manages the caches and the main memory of the multiprocessor system. A processor of the multiprocessor system is configurable to evict from its cache a block of data. The selected block may have a clean coherence state or a dirty coherence state. The processor communicates a notify signal indicating eviction of the selected block to the memory controller. In addition to sending a write victim notify signal if the selected block has a dirty coherence state, the processor sends a clean victim notify signal if the selected block has a clean coherence state.