Teledyne LeCroy SAS Suite User Manual - Manual (Page 270)

Version 6.25 SASSuite User Manual
260
LeCroy Corporation
Tracking
Type
There are two types of tracking, differentiated by the way the recording is terminated, as
listed below.
•
Manual Trigger: In this mode, recording continues until Stop Tracking is
selected in the Tracker menu. If the recording memory (defined in the
Tracker Archive Memory Size selection) is exceeded, the recording wraps
and recording continues, overwriting the oldest contents of the recording
memory. The recording will continue to wrap (multiple times if necessary)
until the manual trigger is pressed or recording is otherwise stopped.
•
Timeout Trigger: In this mode, recording normally continues until one of the
commands issued fails to complete within the user-defined Trigger Timeout
period. In this mode, recording can also be stopped by using the Stop
Tracking selection in the Tracker menu.
Misc.
Options
Under Miscellaneous Options, there is an option for the SASTracker to provide a beep
to alert the user when a trigger occurs.
Tracker
Archive
Memory
Size
Under Tracker Archive Memory Size, the user may decide how large a recording file to
generate by specifying the maximum file size in MB. The maximum value for this setting
is roughly 1024 MB (1 GB). This setting affects when recording is terminated while using
snapshot mode, and affects when recording wraps when using either trigger mode. Each
1MB of recording memory represents information on approximately 10,000 completed
commands.
Time Out
Triggering
Options
Under Time Out Triggering Options, the user may specify the trigger timeout to use with
each of seven command classes. This value in each class may vary from 0 to 32
seconds, and can be specified in integer units of seconds, milliseconds, microseconds or
nanoseconds. Very small values are likely to result in almost immediate termination of
the recording when Timeout Trigger mode is selected.
The seven command classes are as follows:
•
SSP Read
•
SSP Write
•
SSP Other (any SSP command other than Read or Write)
•
SATA Read
•
SATA Write
•
SATA Other (any SATA command other than Read or Write)
•
SMP
Any of the seven command classes can be included as a trigger condition by selecting
the checkbox to the left of the command class. Each selected command class is treated
as a trigger condition such that any command timeout violation in any selected class will
result in the system triggering.
For example, the user may specify that SSP Read commands that fail to complete within
100 microseconds are a trigger condition, but that SSP Write commands are allowed 1
second to complete. This allows the user to "fine tune" the trigger conditions to focus on
specific command classes.
When the system triggers, tracking is stopped and the user is informed that a trigger has
occurred.