公开(公告)号：US06711644B1

公开(公告)日：2004-03-23

申请号：US09627226

申请日：2000-07-27

申请人： Mathew Accapadi ,  Kumar V. Nallapati ,  Mysore Sathyanaraya Srinivas ,  James William VanFleet ,  Nasr-Eddine Walehiane ,  Michael William Wortman

发明人： Mathew Accapadi ,  Kumar V. Nallapati ,  Mysore Sathyanaraya Srinivas ,  James William VanFleet ,  Nasr-Eddine Walehiane ,  Michael William Wortman

IPC分类号： G06F1324

CPC分类号： G06F13/12

摘要： An apparatus and method for communicating the completion of asynchronous I/O requests is provided. In particular, the apparatus and method make use of a new function call which is capable of waiting for a predetermined number of I/O requests to be completed prior to returning to the calling application. Control blocks for the I/O requests are updated after a predetermined number of I/O requests have been completed, i.e. in a process context rather than in an interrupt context as in the known systems. In this way, the overhead associated with known asynchronous I/O system calls is reduced.

摘要翻译： 提供了用于传送异步I / O请求的完成的装置和方法。 特别地，该装置和方法利用能够在返回到呼叫应用程序之前等待预定数量的I / O请求完成的新功能调用。 I / O请求的控制块在已经完成预定数量的I / O请求之后被更新，即在已知系统中，即在处理环境而不是中断上下文中。 以这种方式，减少了与已知的异步I / O系统调用相关联的开销。

公开(公告)号：US06233666B1

公开(公告)日：2001-05-15

申请号：US09156129

申请日：1998-09-17

申请人： Thomas Stanley Mathews ,  Kumar V. Nallapati ,  David William Sheffield

发明人： Thomas Stanley Mathews ,  Kumar V. Nallapati ,  David William Sheffield

IPC分类号： G06F1200

CPC分类号： G06F12/08 ,  G06F12/1009

摘要： A data processor controlled system for providing virtual memory comprising a data processor memory for storing a plurality of real memory pages, secondary storage unit and a memory management control unit for moving the real memory pages into and out of the secondary storage unit wherein each real memory page is respectively stored as a virtual memory page. The invention provides a system and method for deferred allocation of space for a real memory page in the secondary storage unit for recording the address of the space in a table having a plurality of table pages for recording the secondary storage addresses of each of said virtual memory pages. The system includes control unit responsive to the moving of a memory page into the secondary storage, and determining whether the initial table page for recording the address of the moved page is present in the data processor memory, the control unit further responsive to the determining unit for moving, without any external process interrupts, the initial table page into the data processor memory if the initial table page is not present, and the recording unit for recording the address of the moved page into the initial page.

摘要翻译： 一种用于提供虚拟存储器的数据处理器控制系统，包括用于存储多个实际存储器页面的数据处理器存储器，辅助存储单元和存储器管理控制单元，用于将真实存储器页面移入和移出副存储单元，其中每个真实存储器 页面分别存储为虚拟内存页面。 本发明提供了一种用于在辅助存储单元中为实际存储器页面延迟分配空间的系统和方法，用于在具有多个表页的表中记录空间的地址，用于记录每个所述虚拟存储器的辅助存储地址 页面。 该系统包括响应于将存储器页移动到辅助存储器中的控制单元，以及确定用于记录移动的页面的地址的初始表页是否存在于数据处理器存储器中，控制单元还响应于确定单元 为了移动，没有任何外部处理中断，初始表页面进入数据处理器存储器，如果初始表页面不存在，以及记录单元，用于将移动的页面的地址记录到初始页面。