公开(公告)号：US06636948B2

公开(公告)日：2003-10-21

申请号：US09834551

申请日：2001-04-13

申请人： Simon C. Steely, Jr. ,  Stephen R. Van Doren ,  Madhu Sharna

发明人： Simon C. Steely, Jr. ,  Stephen R. Van Doren ,  Madhu Sharna

IPC分类号： G06F1200

CPC分类号： G06F12/0817

摘要： A performance enhancing change-to-dirty operation (CTD) is disclosed wherein contention among several processors trying to gain ownership of a block of data is obviated by arranging the CTD to always succeed. A method and a system are disclosed where a processor in a multiprocessor system having a copy of data gains assured ownership of data that the processor may then write. The method provides for the possibilities of conditions that may exist and provides a scenario that the requesting processor may have to wait for the ownership. Conditions are handled where the memory is the “owner” of the data and where other processor are requesting ownership, and where copies of the data exist at other processors. The method provides for messages to other processor having copies of the data informing them that the data is now invalid.

摘要翻译： 公开了一种性能提升的改变到脏操作（CTD），其中通过使CTD总是成功地排除尝试获得数据块所有权的若干处理器中的争用。 公开了一种方法和系统，其中具有数据副本的多处理器系统中的处理器确保处理器然后可以写入的数据的所有权。 该方法提供可能存在的条件的可能性并提供请求处理器可能必须等待所有权的情况。 在内存是数据的“所有者”以及其他处理器请求所有权的情况下以及数据的副本存在于其他处理器的情况下处理条件。 该方法向具有数据副本的其他处理器提供消息，通知他们数据现在无效。