Resumes
Resumes
Cissy Yuan Phones & Addresses
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1179 Alderbrook Ln, San Jose, CA 95129
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Santa Clara, CA
Publications
Us Patents
Speculative Memory Prefetch
View pageUS Patent:
20090024835, Jan 22, 2009
Filed:
Jul 19, 2007
Appl. No.:
11/780283
Inventors:
Michael K. Fertig - Sunnyvale CA, US
Patrick Conway - Los Altos CA, US
Kevin Michael Lepak - Austin TX, US
Cissy Xumin Yuan - Sunnyvale CA, US
Patrick Conway - Los Altos CA, US
Kevin Michael Lepak - Austin TX, US
Cissy Xumin Yuan - Sunnyvale CA, US
International Classification:
G06F 9/40
US Classification:
712207, 712E09045
Abstract:
A system and method for pre-fetching data from system memory. A multi-core processor accesses a cache hit predictor concurrently with sending a memory request to a cache subsystem. The predictor has two tables. The first table is indexed by a portion of a memory address and provides a hit prediction based on a first counter value. The second table is indexed by a core number and provides a hit prediction based on a second counter value. If neither table predicts a hit, a pre-fetch request is sent to memory. In response to detecting said hit prediction is incorrect, the pre-fetch is cancelled.