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10
Computing and Viewing Decoded Transactions
Interpreting and Navigating Through the Transaction Decode Results
Transactions are decoded and computed from a set of captured PCIe packets that contain the
storage protocol information associated with that transaction.
Decoded transactions are displayed in the Transaction Decode tab in an order based on the
timestamp of the first packet associated with a transaction. One or many PCIe packets may be
associated with a transaction.
Transaction Details Pane
In the left pane of the Transaction Decode tab, transactions with their details are displayed. In this
pane, a transaction is uniquely identified by a Transaction ID.
The details displayed for transactions vary based on their type and the applicable storage protocol.
Moving the mouse pointer to a field of a transaction presents a tool tip with information about that
field.
A color coding scheme is used to clearly indicate transactions of different types. Errored transactions
are displayed in red.
NOTE
Refer to the topic
page 147 to get an understanding of how NVMe and AHCI transactions are decoded and displayed.
126
If you are displaying data captured from multiple U4301A/B modules in a single Protocol Viewer
instance, then transactions from these multiple modules will be interleaved based on the
timestamp of the first packet in the transaction.
To display transactions for each module separately, you can add a Protocol Viewer instance to
each module in the Overview pane of the Logic and Protocol Analyzer GUI.
"Viewing NVMe Transactions"
on page 135 and
"Viewing AHCI Transactions"
Keysight U4301 PCIe Gen3 Analyzer User's Guide
on
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