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  • 付款方式:240VDC
    可售卖地:100摄氏度
    产品特点:船舶、发电、化工、水利
    使用说明:缺乏数据一致性:每当一个高速缓存被其他处理器使用的信息更新时,这种变化需要反映到其他处理器,否则不同的处理器将处理不一致的数据。这样的高速缓存一致性当协议运行良好时,可以在多个处理器之间提供极高性能的共享信息访问。另一方面,它们有时会过载,成为性能瓶颈
  • 手机:+86 153 5902 9662 邮箱:geabbamy@gmail.com
  • 产品详情

BENTLY 3500/15 访问共享内存区域

.BENTLY 3500/15 访问共享内存区域

在计算机软件中,共用存储器要么是

  • 一种方法进程间通信(IPC),即同时运行的程序之间交换数据的一种方式。一个过程将在中创建一个区域随机存取存储哪些其他进程可以访问;
  • 一种节省内存空间的方法,通过使用将对通常是一段数据的副本的访问定向到单个实例虚拟内存映射或对相关程序的明确支持。这最常用于共享库对于就地执行(XIP)。

因为两个进程都可以像访问常规工作内存一样访问共享内存区域,所以这是一种非常快速的通信方式(与其他IPC机制相反,例如命名管道,Unix域套接字或者公共对象请求代理结构(同Common Object Request Breaker Architecture)).另一方面,它的可扩展性较差,例如,通信进程必须运行在同一台机器上(对于其他IPC方法,只有Internet域套接字(而不是Unix域套接字)可以使用计算机网络),如果共享内存的进程运行在不同的CPU上,而底层架构不是这样,则必须小心避免出现问题缓存一致性

例如,共享内存的IPC用于在应用程序和之间传输图像x服务器在Unix系统上,或者在由COM库中的CoMarshalInterThreadInterfaceInStream返回的IStream对象中Windows操作系统

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