公开(公告)号：KR101488270B1

公开(公告)日：2015-01-30

申请号：KR1020130059836

申请日：2013-05-27

Applicant: 한국전자통신연구원

Inventor： 박선영 ,  윤혁중 ,  한상윤 ,  이종태 ,  최희봉 ,  박상우

IPC: G06F7/58

CPC classification number: G06F7/588 ,  G06F7/58

Abstract: 본 발명은 GPU(Graphical Processing Unit) 코어들 간의 메모리 접근 경쟁을 이용한 난수 발생기용 잡음원 엔트로피 획득 장치 및 방법에 관한 것이다. 이를 위해, 본 발명의 잡음원 엔트로피 획득 장치는 복수의 코어들을 임계 영역으로 동시에 호출하는 코어 호출부; 및 복수의 코어들이 임계 영역에 진입한 순서를 근거로, 잡음원 엔트로피를 생성하는 잡음원 엔트로피 생성부를 포함하는 것을 특징으로 한다.

公开(公告)号：KR100431511B1

公开(公告)日：2004-05-13

申请号：KR1020020045951

申请日：2002-08-03

Applicant: 한국전자통신연구원

Inventor： 박선영 ,  손덕주 ,  김경배

IPC: G06F15/16

Abstract: PURPOSE: A method for managing a global buffer capable of executing a load distribution in a cluster system is provided to calculate loads of each host and distribute a request of a global buffer manager for preventing a performance decline caused by a concentration to a specific host in a system of a system load necessary for an operation of a global buffer manager when a buffer cache is shared among many hosts through a global buffer manager in a cluster system. CONSTITUTION: The upper module of a specific host of a cluster system requests a transmission of a buffer block to a global buffer manager(S131). The global buffer manager requests a permission as to a corresponding disk block to a locking manager(S132). The locking manager transmits a response message including an accept of the permission to the global buffer manager(S133). If the global buffer manager acquires a permission, it is checked whether a requested buffer block exists in a buffer cache of a host having a permission(S136). If a requested buffer block does not exist in a buffer cache of a host having a permission, it is checked whether a requested buffer block exists in a buffer cache of other host(S137). If a requested buffer block exists in a buffer cache of other host, a transmission of a buffer block is requested to other host through a communication module(S138,S140). If a transmission of a buffer block requested to other host is failed, the buffer block requested through a disk I/O is copied to the buffer cache(S139). The copied buffer block or a buffer block received from a buffer cache of other host is transmitted to the upper module(S142). If the upper block requests a release of a buffer block use, the global buffer manager returns a permission as to the buffer block(S145).

Abstract translation: 目的：提供一种用于管理能够执行集群系统中的负载分配的全局缓冲器的方法，以计算每个主机的负载并分配全局缓冲器管理器的请求，以防止由于集中到特定主机而导致性能下降 当一个缓冲区缓存在多个主机间通过一个集群系统中的全局缓冲区管理器共享时，一个全局缓冲区管理器操作所需的系统负载系统。 构成：集群系统的特定主机的上层模块请求将缓冲块传输到全局缓冲区管理器（S131）。 全局缓冲区管理器向锁定管理器请求关于相应磁盘块的许可（S132）。 锁定管理器向全局缓冲器管理器发送包括许可接受的响应消息（S133）。 如果全局缓冲区管理器获得许可，则检查所请求的缓冲区块是否存在于具有许可的主机的缓冲区高速缓存中（S136）。 如果请求的缓冲块不存在于具有权限的主机的缓冲区高速缓存中，则检查所请求的缓冲块是否存在于其他主机的缓冲区高速缓存中（S137）。 如果所请求的缓冲块存在于其他主机的缓冲区高速缓存中，则通过通信模块向其他主机请求发送缓冲块（S138，S140）。 如果向其他主机请求的缓冲块传输失败，则通过磁盘I / O请求的缓冲块被复制到缓冲区缓存（S139）。 从其他主机的缓冲区缓存接收的复制的缓冲块或缓冲块被发送到上层模块（S142）。 如果上部块请求释放缓冲块使用，则全局缓冲管理器返回关于缓冲块的许可（S145）。