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. 24, 2014
Filed:
Sep. 21, 2011
Akira Yokosawa, Kanagawa, JP;
Akira Yokosawa, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a multicore processor system includes: a memory region, and a multicore processor that includes plural cores, a first cache, and a second cache shared between the plural cores. The memory region permits first state in which exclusive use by using the first and second cache is granted to one core, second state in which exclusive use by using the second cache is granted to one core group, and third state in which use by using neither the first cache nor the second cache is granted to all core groups. A kernel unit writes back a first cache to the second cache when a transition of the memory region from the first state to the second state is made, and writes back a second cache to the memory region when a transition of the memory region from the second state to the third state is made.