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

Interprocessor Communication
HP NonStop S-Series Server Description Manual—520331-003
9-11
Message Transfer Methods
Figure 9-5. Message Transfers Use Three Phases and Two Transfer Methods
Request Reply
Acknowledge
Reply
Sending
Processor
Receiving
Processor
Setup
Packet
Data
Packets
Control
Packets
Setup Packet
Data Packets Control Packets
Pre-Push Transfer
Post-Pull Transfer
2
1
Short-Length Data and Control
Medium-Length Data and Control
Long-Length Data and Control
Acknowledge Request
VST342.vsd