Service manual

B-28 AlphaServer GS80/160/320 Service Manual
B.10.3 Local Change-to-Dirty, Inval-to-Dirty and Full Block
Transactions
Figure B– 8 Local Change-to-Change Coherency Store Flow
Q1 Q1
Response
Packet
Q1
Probe
Packet
(Inval)
Q1: Visit TTT
via ArbBus
Source/Home QBB
Q0: Visit Directrory
Dtag, TTT and
IOP Tag store
via ArbBus.
Q1: Visit Dtag, TTT and
IOP Tag store
via ArbBus.
QBB of Shared Processor