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:
Jan. 25, 2011
Filed:
Mar. 11, 2010
Yoshihiro Toyohara, Ninomiya, JP;
Tetsuhiro Goto, Hadano, JP;
Masaji Kume, Ebina, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A data processing system including a processing unit on which a control program runs, a plurality of operating systems (OS's) configured to run under control of said control program, a Peripheral Component Interchange (PCI) bus coupled to the processing unit, and a channel adaptor for data transmission/reception, wherein: the channel adaptor is coupled to the PCI bus on a PCI bus side of the channel adapter, and the channel adapter includes only one connecting port on an input/output (I/O) side of the channel adapter; an input/output process is executed between each OS and said channel adaptor by using input/output process control data specifying input/output (I/O) data, the input/output process control data being provided via a Queue Pair having a Queue Pair identifier and including a Send Queue, Receive Queue and Complete Queue; configuration information is provided, exclusively defining the Queue Pair identifier of said Queue Pair of said input/output process control data which is usable exclusively by each respective OS; said channel adaptor can process a plurality of input/output process control data; and each OS uses said input/output process control data corresponding to a unique usable Queue Pair identifier and defined in said configuration information, and thereby a plurality of OS's control input/output process control data having different Queue Pair identifiers relative to said channel adaptor to execute the input/output process without sharing said input/output process control data for said channel adaptor by different OS's.