Teledyne LeCroy Summit T3-16 PCIe Multi-lane Protocol Analyzer User Manual - Manual (Page 227)

Summit T3‐16 PCI Express Multi‐Lane Protocol Analyzer User Manual 215
Show Metrics in the Bus Utilization Window Teledyne LeCroy
10.18.3 Split Transaction Level Graphs
Transactions at the Split level combine all the non‐posted requests with corresponding
completions. This includes Configuration and IO Read and Write requests, as well as
Memory Read requests.
The following shows the graphs for the Split level:
Note: The Pending Requests graph is not directly defined by metrics, but it is useful when considering
metrics. The Pending Requests graph presents the unit‐averaged number of requests that were
pending (in progress) at any moment of time. It allows you to correlate the number of requests
posted to a completer with other performance metrics.
10.18.4 Link Transaction Level Graphs
Memory Writes are the only (posted) requests that do not get promoted to the Split
transaction level. Therefore, Memory Write performance should be viewed at the Link
Transaction level. That is the reason graphs at the Link level only present the Memory
Write‐related metrics and are titled Writes: Response Time: and Writes: Throughput (see
the following figure).