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1. 发明授权

US5873120A Variable split virtual address space allocation with multi-system compatibility 失效
标题翻译：具有多系统兼容性的可变分割虚拟地址空间分配
公开(公告)号：US5873120A
公开(公告)日：1999-02-16
申请号：US642291
申请日：1996-05-03
申请人： Michael Seward Harvey , Karen Lee Noel , Wayne Michael Cardoza
发明人： Michael Seward Harvey , Karen Lee Noel , Wayne Michael Cardoza
IPC分类号： G06F9/50 , G06F12/10 , G06F12/00
CPC分类号： G06F9/5016 , G06F12/109 , G06F2212/656
摘要： A virtual memory system is disclosed, providing a virtual address space of virtual addresses simultaneously available to a given process. The virtual address space includes a process private space accessible only to a given process, as well as a shared space of virtual addresses potentially accessible to two or more processes. The process private space includes virtual addresses on one side of a private/shared virtual address boundary, while the virtual addresses within the shared space are on the other side of the private/shared virtual address boundary. The private/shared boundary is ensured to be greater than a predetermined highest process private (or shared) virtual address of a different virtual memory system, and less than or equal to a predetermined lowest shared (or process private) virtual address of that different virtual memory system. Compatibility is ensured for software written for the different virtual memory system, allowing such software to run without modification on the present system. In an example embodiment, the private/shared boundary is set responsive to a user input reflecting a desired ratio between shared and process private space.
摘要翻译：公开了一种虚拟存储器系统，其提供了给定进程同时可用的虚拟地址的虚拟地址空间。虚拟地址空间包括仅对给定进程可访问的进程专用空间，以及两个或多个进程可能可访问的虚拟地址的共享空间。进程私有空间包括专用/共享虚拟地址边界一侧的虚拟地址，而共享空间内的虚拟地址位于专用/共享虚拟地址边界的另一侧。确保私有/共享边界大于不同虚拟存储器系统的预定最高处理私有（或共享）虚拟地址，并且小于或等于该不同虚拟存储器系统的预定最低共享（或处理专用）虚拟地址内存系统为不同的虚拟内存系统编写的软件保证了兼容性，允许这样的软件在当前系统中无需修改即可运行。在示例实施例中，响应于反映共享和进程私人空间之间的期望比率的用户输入设置专用/共享边界。

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