Teledyne-lecroy PETracer ProtoSync Software User Manual Manuale Utente Pagina 106

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Chapter 8: Reports and Tools PETracer Software User Manual
100 Teledyne LeCroy
Marker
Packet
Direction
•Type
Length
•Address
Payload
Handshake
Time Stamp
8.7 Flow Control Tracking
The Flow Control View mode highlights portions of the packets that affect flow control and
displays flow control values. Flow control values shown at the beginning of Link
Transaction display the credit values that were available prior to TLP transmission. Flow
control values shown at the end of the Link Transaction display the credit values that were
available after TLP was transmitted. Hover the mouse over the field to display tool-tips.
Refer to the following screen capture.
If the trace includes Flow Control initialization, PETracer detects the amount of available
credits based on the values advertised in InitFC packets. If the InitFC packets are not in
the trace, the amount of available credits can be set using the FC Credit Setup dialog.
Select View > FC Credits Setup... displays the FC Credit Setup dialog (see the following
screen capture).
For each virtual channel that is present in the trace you need to specify the amount of
available credits before the beginning of the trace. You can also specify the values of
credit fields for UpdateFC packets before the beginning of the trace. If the values of the
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