Hitachi, Ltd.

Hitachi Process Computer Engineering, Inc.

Hitachi Process Engineering, Inc.

Toshimasa Saika

Hiroshi Kobayashi

Hideki Sato

Hiroaki Nakanishi

Masayuki Tanji

Hiroyuki Hori

Atsushi Matsuno

Teruyasu Nakahashi

Keiichi Sannomiya

Shigeaki Wada

Masanori Horie

Masanori Naito

Shigeru Endo

Shuji Nishiyama

Tomohito Ebina

Shimako Tanno

A computer system is so configured as to be divided into a control system which should have high reliability and high responsiveness and an information system which does not access the control system. They are connected via a transmission path (transmission path of control system and transmission path of information system). Centralized management of development and maintenance is performed from a software maintenance system. In development and maintenance of software, management according to the feature of each software such as processing contents of each software, demanded reliability, and version up frequency is performed from a maintenance system for exclusive use by using a transmission path of information system. Thereby, development and maintenance having high reliability and expandability is realized.

System for software update in manner based on processing properties of

An information processing system capable of performance measurement by the use of a small amount of mounted hardware. The information processing system having central processors installed therein comprises a control circuit, and a performance measurement validation register for specifying whether a performance measurement function is valid or invalid. In a case where the validity of the measurement function has been specified by the register, the control circuit operates one loop in a duplex configuration as a performance measurement facility. At this time, counter #1-counter #3 are used as counters for totalizing performance information. On the other hand, in a case where the invalidity of the measurement function has been specified, both loops in the duplex configuration are operated as the central processors. At this time, the counter #1-the counter #3 are used as timer counters for controlling buses.

Information processing system having performance measurement capabilities

Growing community of inventors

Hitachiota, Japan

Toshimasa Saika