NonStop S-Series Server Description Manual (G06.24+)

Input/Output Operations
HP NonStop S-Series Server Description Manual—520331-003
10-27
Communications Request Processing
Note that the bus transfer engine (BTE) is not involved in any of these operations,
because none of the work originates in the processor.
Figure 10-13. Controller Originates All Work in Most Communications Transfers
Pull
Queue
Entry
BTE
AVT
Push
Queue
Entry
Push
Data In
Processor ServerNet Adapter
3
4
5
SBI
Controller
BTE
AVT
2
3
BTE
AVT
2
3
SBI
SBI
Pull
Data Out
BTE
AVT
2
3
4
Data
Buffer
SBI
1
Read
Request
Controller
1
Write
Request
5
Controller
1
Read
Request
Controller
1
Write
Request
Work
Queue
Queue
Pointers
Work
Queue
2
6
Data
Buffer
4
Processor ServerNet Adapter
Processor ServerNet Adapter
Processor ServerNet Adapter
VST359.vsd