QIO Configuration and Management Manual

Introduction to QIO

QIO Configuration and Management Manual—424717-008

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Outbound Data Flow

To send data, the client process retrieves a message descriptor from the shared

memory segment. The data to be sent is placed in the message buffer and the

message descriptor is put onto the outbound queue, invoking the driver to send the

data to the LAN adapter.

Client Process Termination

Before terminating, the client process must release the QIO resources that it holds.

This section describes the normal termination sequence that the client processes

should follow.

1. The client process deregisters its queues and the data structures allocated for

each port.

2. The client process releases all the pool space acquired from the shared memory

segment.

3. The client process releases the module data structures to the shared memory

segment.

4. Finally, the client process detaches the shared memory segment from its data

space.

Figure 1-5. Flow of Data Sent to the LAN by a Client Process

Driver/Interrupt Handler

Inbound

Queue

Outbound

Queue

LAN

Outbound Data

Client

Process

Message

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