1
Taro Inoue, Hidenori Umeno, Shunji Tanaka, Tadashi Yamamoto, Toru Ohtsuki: System for recovery from a virtual machine monitor failure with a continuous guest dispatched to a nonguest mode. Hitachi, Fay Sharpe Beall Fagan Minnich & McKee, July 25, 1995: US05437033 (159 worldwide citation)

A system and method for continuous operation of a virtual machine system having operation modes including a guest mode in which virtual machines are operated and a nonguest mode in which a virtual machine monitor for controlling the virtual machines is operated. The continuous guest is a virtual mac ...


2
Hiroshi Ikegaya, Hidenori Umeno, Takashige Kubo, Yoshio Ukai, Nobuyoshi Sugama: Address translator. Hitachi, Antonelli Terry & Wands, January 31, 1989: US04802084 (106 worldwide citation)

In order to carry out address translation which can reduce an overhead of the VMCP to support a virtual storage, a flag indicating a common segment in the virtual machine and a system identifier are held in a TLB, and a VM identifier is held in a segment table origin stack. For the common segment, a ...


3
Taro Inoue, Hidenori Umeno, Toru Ohtsuki, Kiyoshi Ogawa: Virtual machine system with vitual machine resetting store indicating that virtual machine processed interrupt without virtual machine control program intervention. Hitachi, Antonelli Terry Stout & Kraus, February 16, 1993: US05187802 (102 worldwide citation)

In a virtual machine system in which a virtual machine directly executes operations by use of the hardware without an intervention from the virtual machine control program (VMCP), at an occurrence of an input/output interruption, the system sets to a storage an event that the input/output interrupti ...


4
Shunji Tanaka, Hidenori Umeno, Nobuyoshi Sugama, Masaru Sato: Virtual machine control method and virtual machine system. Hitachi, Fay Sharpe Beall Fagan Minnich & McKee, September 3, 1996: US05553291 (75 worldwide citation)

A virtual machine control method for a supercomputer enables a plurality of virtual machines to use a vector processor. Control of the use of the vector processor is through the scalar processor. When a virtual machine requires use of the vector processor, it is first determined whether one of the o ...


5
Shunji Tanaka, Takayoshi Asai, Taro Inoue, Hidenori Umeno, Tsuyoshi Watanabe: Method and system for controlling/monitoring computer system having plural operating systems to run thereon. Hitachi, Antonelli Terry Stout & Kraus, January 31, 1995: US05386565 (68 worldwide citation)

An OS control method for controlling an operating system (OS) running in a computer system on which a plurality of OSs run and which includes an instruction processor, a control program for controlling running of a plurality of OSs, a main storage, an external storage device, and an address translat ...


6
Shunji Tanaka, Hidenori Umeno: Dispatch control of virtual machine. Hitachi, Sterne Kessler Goldstein & Fox, March 10, 1992: US05095427 (58 worldwide citation)

A method and a system in a virtual machine system controlling a simultaneous run of one or more operating systems (OS's) by use of a virtual machine control program on a real machine including a storage area for each virtual processor constituting the virtual machine for saving a status of each virt ...


7
Satoshi Seino, Hidenori Umeno, Kiyoshi Ogawa, Katsumi Takeda: Multiprocessor system statically dividing processors into groups allowing processor of selected group to send task requests only to processors of selected group. Hitachi, Antonelli Terry Stout & Kraus, April 26, 1994: US05307495 (57 worldwide citation)

In a computer system capable of being configured in a multiprocessor system, a plurality of virtual machines are grouped by object of use to define a plurality of processor groups. Each processor has an identifier for a processor group to which it belongs. When an instruction which requires synchron ...


8
Hidenori Umeno, Takashige Kubo, Nobutaka Hagiwara, Hiroaki Sato, Hideo Sawamoto: I/O Execution method for a virtual machine system and system therefor. Hitachi, Antonelli Terry & Wands, December 5, 1989: US04885681 (46 worldwide citation)

In a virtual machine system (VMS) capable of concurrently running at least one operating system (OS) under one real computer system and a control program (VMCP) for controlling the VMS, the object is to reduce the overhead produced for simulating VM I/Os by direct I/O execution. A VM information are ...


9
Shunji Tanaka, Toru Ohtsuki, Hiroaki Sato, Hideo Sawamoto, Ryo Yamagata, Masaya Watanabe, Hidenori Umeno, Masatoshi Haraguchi: Input/output execution apparatus for a plural-OS run system. Hitachi, Antonelli Terry Stout & Kraus, March 12, 1996: US05499379 (37 worldwide citation)

A plural-OS run system in which a plurality of operating systems (OSs) capable of operating on machines of different architectures, respectively, are allowed to run on one bare machine under the control of one control program (CP) or one control means. The input/output instruction and input/output i ...


10
Shunji Tanaka, Hidenori Umeno: Input-output control method in a virtual machine system. Hitachi, Antonelli Terry & Wands, December 12, 1989: US04887202 (37 worldwide citation)

An I/O control system in a virtual machine system has at least one virtual machine (VM) running under control of a virtual machine control program (VMCP) and has a direct I/O execution mode in which an I/O interruption to the I/O device dedicated by the running VM is directly executed without interv ...



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