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Using the Traffic Summary Pane Chapter 14, Using the Secondary Panes in Xgig TraceView
Xgig Analyzer User’s Guide 347
Traffic Summary SAS/SATA Primitive Counters
All SAS/SATA primitive sequences will only be counted once per sequence. Refer to the
CurrentProtocolVersions.txt document in the installation directory for information on the
SAS/SATA spec. The three primary types of metrics as follows:
•
Primitives Outside Connections
These are all primitives that are outside of established SSP, SMP, or STP connections, such as
ALIGNs, OPEN_ACCEPTs, and CLOSEs.
• Primitives Inside SSP/SMP Connection
Serial SCSI Protocol (SSP) is the foundation for supporting SAS disk drives.Serial
Management Protocol (SMP) is the foundation for managing SAS Expanders. These metrics
count the SAS primitives within SSP or SMP connections, such as RRDY, DONE, and NAK.
• Primitives Inside STP Connection
Serial Tunneling Protocol (STP) is the foundation for supporting SATA devices within SAS
storage enclosure subsystems. These metrics count the SATA primitives within STP
connections, such as SATA_R_RDY and SATA_HOLD.
When there are multiple primitives of the same type, for example ALIGNs, there is a metric in the
hierarchy that counts all primitives of that type. In this case, they are ALIGN(0), ALIGN(1),
ALIGN(2), ALIGN(3). Counters that break out the metric into the specific primitives are listed
under the primitive type.
In SAS/SATA traces, if the analyzer does not capture the beginning of a Primitive Sequence then
that sequence will not be included in the Traffic Summary Counters. If you are not sure if a
sequence is being counted, look for a beginning of a sequence icon in the DWord View. If none are
marked as such then the sequence will not be included in the Traffic Summary counters.
Traffic Summary SAS/SATA Connection Counters
SAS/SATA Connection counters provide a count of all successful connections by counting
OPEN_ACCEPT primitives. Connection counters also provide counts of all failed attempts to
establish connections by counting all forms of the OPEN_REJECT primitive. Each
OPEN_ACCEPT or OPEN_REJECT is categorized as belonging to the STP, SMP, or STP
protocol based the Connection Protocol Type field found in the associated OPEN_ADDRESS
frame. The metrics are listed by protocol as follows:
• SSP Connections
Serial SCSI Protocol (SSP) is the foundation protocol for supporting SAS disk drives.
Counters include Accepted Connections and all types of Rejected Connections.
•
SMP Connections
Serial Management Protocol (SMP) is the foundation protocol for managing SAS Expanders.
Counters include Accepted Connections and all types of Rejected Connections.
• STP Connections
Serial Tunneling Protocol (STP) is the foundation protocol for supporting SATA devices
within SAS storage enclosure subsystems. Counters include Accepted Connections and all
types of Rejected Connections.