Lecture 29. Cache Coherence - Carnegie Mellon - Computer Architecture 2015 - Onur Mutlu

Lecture 29. Cache Coherence Lecturer: Prof. Onur Mutlu (http://users.ece.cmu.edu/~omutlu/) Date: Apr. 10th, 2015 Lecture 29 slides (pdf): http://www.ece.cmu.edu/~ece447/s15/li... Lecture 29 slides (ppt): http://www.ece.cmu.edu/~ece447/s15/li... Course webpage: http://www.ece.cmu.edu/~ece447/s15/do... Module materials: http://www.ece.cmu.edu/~ece447/s15/do... 0:00 - Review Directory-Based Cache Coherence 7:23 - Example Directory-Based Cache Coherence 18:53 - Snooping Cache Coherence 25:27 - MSI State Machine 27:11 - MESI State Machine 47:00 - Revisiting Two Cache Coherence Models 56:33 - Revisiting Directory-Based Cache Coherence 1:04:00 - MESI Directory Transaction 1:11:02 - Scaling the Directory