Keysight Technologies U4301 User Manual page 175

control charts contain a point for every packet that is a part of that series. This is in contrast to all
other charts which represent a group of packets in a sample period. Flow control credit levels are
represented by UpdateFC series.
Flow Control Performance Parameters
The performance parameters for the Flow Control are explained below:
Data Flow Control
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Header Flow Control
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Packets
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Band Chart
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Keysight U4301 PCIe Gen3 Analyzer User's Guide
UpdateFC_P (Bytes) - Shows the minimum, maximum, as well as average data flow control credit
levels for posted transactions.
UpdateFC_NP (Bytes) - Shows the minimum, maximum, as well as average data flow control credit
levels for non-posted transactions.
UpdateFC_Cpl (Bytes) - Shows the minimum, maximum, as well as average data flow control credit
levels for Completions data.
HeaderFCP (Bytes) - Shows the minimum, maximum, as well as average header flow control credit
levels for posted transactions.
HeaderFCNP (Bytes) - Shows the minimum, maximum, as well as average header flow control credit
levels for non-posted transactions.
HeaderFCCpl (Bytes) - Shows the minimum, maximum, as well as average header flow control credit
levels for Completions data.
Memory Read (Bytes) - Charts the size of Memory Read requests in each direction (X and Y axes).
Memory Write (Bytes) - Maps the size of Memory Write and MsgD packets in each direction.
Memory_CplD (Bytes) - Charts the size of Memory completion with data packets in each direction.
Inst. CplD and Inst. Write (Mbytes/s) - The instantaneous completion with data (Inst. CplD) and
instantaneous write (Inst. Write) show Instantaneous Bandwidth in each direction. Instantaneous
Bandwidth is defined as the number of data bytes (in MegaBytes) in the packet divided by the
time (in seconds) since the end of the previous data carrying packet to the end time of the current
data carrying packet.
Each packet carrying data is represented by a point in these series.
Interrupts- Shows the location in the graph where MSI Write, Msg Assert_INT and Msg
Deassert_INT occurred. This is displayed in the Band chart area of the chart pane.
Error Packet- Shows the location in the graph where packets with any error occurred. This is
displayed in the Band chart only when the Include Errors checkbox is enabled under Data Range
heading.
Viewing Offline Performance Summary 11
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