Faculty Profiles - NOMURA Yoshinari

MISC - NOMURA Yoshinari

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A Method for Monitoring of PCI Devices

乃村能成, 山本裕馬, 谷口秀夫, 桝本圭, 伊藤健一

情報処理学会論文誌 47 ( SIG12(ACS15) ) 2006

既存のメール分類機構の組み合わせを可能にする機構の実現と評価

山本泰隆, 乃村能成, 谷口秀夫

情報処理学会シンポジウム論文集 2006 ( 6-2 ) 2006

Directory Oriented Buffer Cache Mechanism

田端利宏, 小峠みゆき, 齊藤圭, 乃村能成, 谷口秀夫

情報処理学会シンポジウム論文集 2006 ( 14 ) 2006

メールの送受信を用いた迷惑メール登録システムの提案

山本泰隆, 乃村能成, 谷口秀夫

電気・情報関連学会中国支部連合大会講演論文集(CD-ROM) 57th 2006

プロセスとして実現したデバイスドライバにおける仮想空間切り替えのスループットへの影響

野村裕佑, 岡本幸大, 乃村能成, 谷口秀夫

電気・情報関連学会中国支部連合大会講演論文集(CD-ROM) 57th 2006

TwinOSにおけるアイドル状態に着目したOS切替え機能の実現

山本裕馬, 乃村能成, 谷口秀夫

電気・情報関連学会中国支部連合大会講演論文集(CD-ROM) 57th 2006

Evaluation of dynamic running mode switch of application programs

Yokoyama Kazutoshi, Nomura Yoshinari, Taniguchi Hideo, Maruyama Katsumi

IPSJ SIG Notes 2005 ( 79 ) 49 - 56 2005.8

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

System-call is a high cost operation because it causes a running mode switch of a process. This paper presents an implementation and evaluation of a dynamic running mode switch mechanism of application programs. Our proposed mechanism has a characteristic of on-demand and on-the-fly mode switching of a process from user mode to supervisor mode and vice versa. While a process is in the supervisor mode, it is able to emit a system-call as a corresponding simple function call. Thus, it eliminates the overhead of a conventional trap-based system-call procedure. The evaluation shows that our implementation runs 800-900 clocks faster than a conventional system-call based implementation does.

Classified Information Diffusion Tracing Triggered by Open System Call

HAKOMORI Satoshi, YOKOYAMA Kazutoshi, NOMURA Yoshinari, TANIGUCHI Hideo

IPSJ SIG Notes 2005 ( 79 ) 1 - 8 2005.8

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Recently, leakage of classified information such as personal information has become serious problem. To prevent the leakage, it is important to know where the information diffuses in the computer environment. In this paper, we propose the tracing method of the classified information diffusion. The tracing starts when a process invokes the open system call for the file, and checks if whole or a part of the classified information may be copied to the opening file. We describe the algorithm of the method, Implementation of the method on the Linux kernel, and the overhead to the system calls.

Proposal of an Operating System Architecture Using Continuation-Based Zero-Wait Threads

KUSAKABE SHIGERU, NOMURA YOSHINARI, TANIGUCHI HIDEO, AMAMIYA MAKOTO

IPSJ SIG Notes 99 ( 48(OS-99) ) 69 - 76 2005.6

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

In this paper, we propose an operating system architecture using continuation-based zero-wait threads. A thread is supposed to run to completion without suspension, and execution control between threads are performed based on continuations attached to threads. This approach enables us to reduce thread management overhead and to realize flexible scheduling schemes. We discuss the operating system architecture and examines its effectiveness in handling I/O requests.

UNIX環境を利用した細粒度マルチスレッド制御法の評価手法

小川泰彦, 乃村能成, 日下部茂, 谷口秀夫, 雨宮真人

第67回全国大会講演論文集 2005 ( 1 ) 39 - 40 2005.3

Tenderにおける資源「プレート」のサイズ変更機能

大本拓実, 田端利宏, 乃村能成, 谷口秀夫

第67回全国大会講演論文集 2005 ( 1 ) 43 - 44 2005.3

デュアル OS 「NINJA」における擬似 NIC の評価

山本裕馬, 桝本圭, 田渕正樹, 伊藤健一, 乃村能成, 谷口秀夫

第67回全国大会講演論文集 2005 ( 1 ) 37 - 38 2005.3

デュアルOS「NINJA」における2つのOSの統合

安達俊光, 田渕正樹, 伊藤健一, 乃村能成, 谷口秀夫

第67回全国大会講演論文集 2005 ( 1 ) 33 - 34 2005.3

A Doorplate Connected With Groupware Tools

NOMURA YOSHINARI

IPSJ SIG Notes 121 ( 3(DPS-121 GN-54) ) 43 - 47 2005.1

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Groupware tools have enabled us to share information about location of each member. It would be useful for visitors to display this information on the door of our office. However, it is difficult to place a PC-style groupware terminal in front of the door for cost and appearance reason. Also, we will have a security issue if we open the bare groupware information to the visitors. In this paper, I propose a smart doorplate which solves these problems.

A Mechanism for Mixing up Existing Spam Filters

山本泰隆, 乃村能成, 谷口秀夫

情報処理学会シンポジウム論文集 2005 ( 19 ) 256 - 260 2005

A Method of Program Execution Control for Multithread Execution Mechanism

FUKUTOMI KAZUHIRO, NOMURA YOSHINARI, KUSAKABE SHIGERU, TANIGUCHI HIDEO, AMAMIYA MAKOTO

IPSJ SIG Notes 96 ( 63(OS-96) ) 135 - 140 2004.6

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

A large number of threads run concurrently in the multithreading environments such as the processors with thread-level parallel execution mechanism. In those environments, the execution unit which a processor supports may differ from the schedule unit which operating system manages. Especially, for the machine which has the mechanism to control parallel non-preemptive event-driven thread execution, a new operating system mechanism has to be developed to control program execution with less overhead. 0ne of the key issues of this operating system mechanism is how to schedule the conventional threads or processes which are constructed with non-preemptive event-driven threads. In this paper, we propose a program execution controlling method, which covers the waiting for an event, based on continuity and character of program processing in multithread execution mechanism.

A Process Scheduling Mechanism Suitable for Fine Grain Multithread Architecture

NOMURA YOSHINARI, AMAMIYA SATOSHI, KUSAKABE SHIGERU, TANIGUCHI HIDEO, AMAMIYA MAKOTO

IPSJ SIG Notes 96 ( 63(OS-96) ) 129 - 134 2004.6

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Microprocessors based on the fine grain multithread architecture are characterized by its thread level parallelism. lt essentially generates a large number of threads in a second. Therefore, it is very difficult to schedule all the threads effectively by a conventional software process scheduler. For this reason, these microprocessors have a sort of embedded hardware thread control mechanism. However, if operating system does not pay any cost for the scheduling, system would be uncontrollable. In this paper, we propose a cost-effective process scheduling method suitable for the fine grain multithread architecture.

Evaluation of a DuaIOS 「NINJA」

TABUCHI Masaki, MASUMOTO Kei, ITOH Ken-ichi, NOMURA Yoshinari, TANIGUCHI Hideo

情報処理学会研究報告 8 ( 32(EVA-8) ) 67 - 72 2004.3

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

In recent PC hardware's develop leads supplying of various services. These various services sometimes need to be performed in a PC, then OS has be customized in the existing way. Existing method like virtual machine, enables multiple OS's runs on a single PC and solves the problem. But, these method diminish. I/O performance of each OS. We propose a DualOS method that two different types of OSes can run on a single PC for providing two different types of service or function. And we apply our method on two linuxes and name it 「NINJA」.We evaluate NINJA's performance and mention its features.

田渕正樹, 桝本圭, 伊藤健一, 乃村能成, 谷口秀夫

第66回全国大会講演論文集 2004 ( 1 ) 1 - 2 2004.3

Implementation of a Hardware Sharing Method for Multiple Real Machine on a Single System

MASUMOTO Kei, TABUCHI Masaki, ITOH Ken-ichi, NOMURA Yoshinari, TANIGUCHI Hideo

IPSJ SIG Notes 94 ( 80(OS-94) ) 9 - 16 2003.8

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Multiple operating system has become popular Major existing method is that secondary operating systems run on a primary operating system This relation between primary operating system and others causes some problem such as an accidental stop of primary operating system leads to the others We proposed a new framework that operating systems can run independently and simultaneously on a single processor In basic concept of this framework, coexistent operating systems don't share hardwares for their independency But for better availability, it is desirable that they can share hardwares This paper describes a method for sharing hardware resource among the coexistent operating system and its implementation focused on PCI hardware In this method, each operating system occupies some hardwares but can provide arbitrary hardware resource to the others safely

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