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Chapter 14, Using the Secondary Panes in Xgig TraceView
SSP Frame Counters
SSP frame counters include SSP Data, XRdy, Command, Response, Task Management, and
Unknown frame types. Individual types of SSP Responses and Task Management frames are
broken down into separate counters, including counters for specific SSP response codes.
SMP Frame Counters
SMP request and response frames are counted by each type of request or response. Unknown SMP
requests and responses are also counted. SATA Frame Counters
Counters include all types of SATA frames. Counters are included for all types of SATA errors as
indicated by the SATA error bits. Note that frames can be counted more than once within the FIS
error counters if they have more than one error bit set.
Traffic Summary SAS/SATA Transaction Counters
SAS/SATA Transaction counters provide a count of all SSP/ATAPI/SATA transactions by
counting all SSP/ATAPI/SATA events with request sizes. The transaction counters include all the
Read/Write commands for SSP/ATAPI/SATA; counters are added based on each unique request
size.
The metrics are listed by protocol as follows:
•
SSP Transaction Request Sizes
Serial SCSI Protocol (SSP) is the foundation protocol for supporting SAS disk drives.
Counters include all types of request size events for read, write, and write and verify. See the
T10 committee web site, http://www.t10.org/drafts.htm, for up to date SSP specifications.
Refer to the CurrentProtocolVersions.txt document in the installation directory for information
on the SAS/SATA specification.
•
ATAPI Transaction Request Sizes
AT Attachment with Packet Interface (ATAPI) is the older standard interface used to connect
storage devices such as hard disks, solid-state drives, and CD-ROM drives inside personal
computers. Counters include all types request size events for read, write, and write and verify.
See the T13 committee web site, http://www.t13.org/, for up to date ATAPI specifications.
Refer to the CurrentProtocolVersions.txt document in the installation directory for information
on the SAS/SATA specification.
•
SATA Transaction Request Sizes
Counters include all types of SATA request size events for both read and write. See the T13
committee web site, http://www.serialata.org/, for up to date SATA specifications. Refer to the
CurrentProtocolVersions.txt document in the installation directory for information on the
SAS/SATA specification.
Transaction counters are dynamic, meaning transaction counters are added for different request
sizes. The primary counter for the type of frame is always counted and displayed, but the sub-level
counters of request sizes only appear if a frame with a specific request size is encountered in the
decode. For each type of frame, a breakdown of the request sizes are counted in the added dynamic
counter(s) in a sub-level of the Traffic Summary hierarchy. The primary counter is always the total
of all dynamic counters that are within its branch in the hierarchy.
352
Using the Traffic Summary Pane
Xgig Analyzer User's Guide