C.2.3 MESI State Diagram

A given cache line's state changes as protocol messages are sent and received, as shown in Figure [*].

Figure: MESI Cache-Coherency State Diagram
\includegraphics{appendix/whymb/MESI}

The transition arcs in this figure are as follows:

Quick Quiz C.4: How does the hardware handle the delayed transitions described above? End Quick Quiz

Paul E. McKenney 2011-12-16