Computer system with a device for selectively blocking writebacks of data from a writeback cache to memory
摘要
A computer system that has a main memory and a writeback cache memory also has an I/O device capable of data streaming. A memory controller responds to signals that the I/O device will perform a burst transfer of data to the main memory and blocks potential writebacks from the cache memory to the I/O device. Potential writing over of the data from the I/O device by a flushed cache line written back to the main memory is thereby prevented. The system performance is increased since the data from the I/O device can be written to the main memory without waiting for a snoop cycle and a writeback to be performed.
申请公布号
US5664150(A)
申请公布日期
1997.09.02
申请号
US19950408168
申请日期
1995.03.21
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
ISAAC, GERALD GEORGE;LANGGOOD, JOHN K.;LEUNG, WAN LIN;SENDLEIN, KIMBERLY KIBBE;SZAREK, JOHN JOSEPH;YEE, EDWARD