Company Filing History:
Years Active: 1989-1996
Title: Nobuyoshi Sugama: Innovator in Virtual Machine Technology
Introduction
Nobuyoshi Sugama is a prominent inventor based in Chigasaki, Japan. He has made significant contributions to the field of virtual machine technology, holding two patents that enhance the efficiency and functionality of supercomputers. His work is instrumental in advancing the capabilities of virtual machines, particularly in their interaction with vector processors.
Latest Patents
Sugama's latest patents include a "Virtual Machine Control Method" and a "Virtual Machine System." The virtual machine control method allows multiple virtual machines to utilize a vector processor effectively. It ensures that when a virtual machine requires access to the vector processor, the system first checks if another virtual machine is currently using it. If the vector processor is available, the scalar processor is dispatched to the requesting operating system. If it is in use, the requesting operating system is placed in a wait state until access is granted. This innovative approach allows for efficient communication regarding the availability of the vector processor without needing intervention from the virtual machine monitor.
His second patent, the "Address Translator," focuses on reducing overhead in virtual machine control programs to support virtual storage. This method involves holding a flag indicating a common segment in the virtual machine and a system identifier in a Translation Lookaside Buffer (TLB). By comparing the current virtual machine identifier with the one in the segment table origin stack, the system can determine the validity of TLB entries, thus optimizing performance.
Career Highlights
Nobuyoshi Sugama is currently employed at Hitachi, Ltd., where he continues to innovate and develop advanced technologies in the realm of virtual machines. His work at Hitachi has positioned him as a key player in the field, contributing to the company's reputation for technological excellence.
Collaborations
Sugama collaborates with notable colleagues, including Hidenori Umeno and Hiroshi Ikegaya. Their combined expertise fosters an environment of innovation and creativity, leading to groundbreaking advancements in their respective fields.
Conclusion
Nobuyoshi Sugama's contributions to virtual machine technology exemplify the impact of innovative thinking in the tech industry. His patents not only enhance the functionality of supercomputers but also pave the way for future advancements in virtual machine systems.