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:
Jun. 07, 2016
Filed:
Dec. 15, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Akihiro Takamura, Kokubunji, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A cache storage apparatus has an entry including a tag bit for managing an address in the memory of the data, the data, and a reference count for managing a number of times that the data is referenced. If it is possible to read in the data from the entry, in a case where the reference address is for a prefetch, a value of the reference count of the entry is increased, and in a case where the reference address is for a fetch, the value of the reference count of the entry is decreased. If it is not possible to read in the data from the entry, in a case where the reference address is for a prefetch, a replacement of prefetched data in the entry is prohibited until the value of the reference count of the entry becomes zero.