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:
Dec. 06, 1994
Filed:
Oct. 28, 1991
Larry D Larsen, Raleigh, NC (US);
David W Nuechterlein, Durham, NC (US);
Kim E O'Donnell, Raleigh, NC (US);
Lee S Rogers, Raleigh, NC (US);
Thomas A Sartorius, Raleigh, NC (US);
Kenneth D Schultz, Cary, NC (US);
Harry I Linzer, Raleigh, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The use of a high speed cache memory may be selectively controlled when a data processing task is interrupted in response to an interrupt signal, in order to prevent the interrupt from chilling the cache when insufficient performance enhancement will be realized. Disturbing the cache memory during performance of an interrupting task is prevented, thereby increasing the hit ratio of the cache when the interrupted task is resumed. Cache control information may be incorporated into a program status vector or program status word which is loaded into a program status register on occurrence of an interrupt.