Keysight Technologies U4301, User Manual

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Keysight U4301 PCIe Gen3 Analyzer User’s Guide 143
Computing and Viewing Decoded Transactions 10
Viewing Decoded PRPs for NVMe Commands
Physical Region Page (PRP) entries are used in read/write transactions to indicate the physical
memory locations in system memory. These memory locations are used by controller for data
transfers to and from system memory. For a Read request, the PRP entry indicates the memory
location where the controller should transfer the data read from system memory. For a Write
request, the PRP entry indicates the memory location from where the controller has to gather the
data to be written to the system memory.
These addresses can be directly a memory location or a pointer to a location that provides a set of
addresses of contiguous memory to perform large read/write operations.
In the Transaction Decode tab, you can view the PRP entries associated with a command that utilizes
PRP entries such as an NVMe Read or Write command.
To view the decoded PRPs of an NVMe command
1 Right-click the transaction displayed for the command in the Transaction Decode tab.
2 Select
Visualize Transaction...
A dialog box is displayed with PRPs and other related transactions associated with the command.