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:
Sep. 15, 2020
Filed:
May. 07, 2018
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Takeshi Mishina, Kawasaki, JP;
Hideki Sakata, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A processing device includes multiple processing units and multiple memory devices respectively assigned to the multiple processing units. Each of the multiple processing units includes a cache memory configured to retain data stored in the memory device assigned to itself, and fetched data taken out from the memory device of the processing unit other than itself. When an access request for the fetched data is received from a source processing unit from which the fetched data has been taken out, the cache memory determines occurrence of a crossing in which the access request is received after the cache memory issues write back information instructing to write back the fetched data to the memory device assigned to the source processing unit. If the crossing has occurred, crossing information indicating that the crossing has occurred is output as a response to the access request.