HP R4.2 - Manual (Page 631)

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Summary of Commands spStatus
UCS 1000 R4.2 Administration 585-313-507 Issue 3 April 2000 592
TDM Servicings Deferred
This is the number of times that a TDM servicing was deferred because the
TDM interrupt came in on top of a DSP interrupt for a time slot. It is not a
serious problem. It just indicates that the hardware is busy and conflicts are
being resolved. It can be a potential area of difficulty if the DSP routine is too
slow and the TDM overruns while it is waiting to be serviced.
Letters Received, Letters Sent, Letters Deferred, Letters Discarded
This is the number of letters received from the PC, the number of letters sent
to the PC, the number of letters going to the PC that had to be temporarily
stored in the overflow area because the PC was not keeping up, and the
number of letters that even the overflow area could not handle and had to be
discarded. Going into the overflow area is an indication of potential trouble,
but is not serious if the duration is short. If the SP code continues to generate
too many letters in too short of a period of time, then it becomes a serious
problem. The same thing can happen if the PC cannot keep up.
Executive Time, Idle Time, Task[]
These counts indicate the load being placed on each portion of the system.
The executive time is the number of times the TDM interrupted some activity
of the SP Executive that was what is considered to be the idle look-for-work
activity. The idle time is the number of times the TDM interrupted the look-for-
work activity. When tasks are active, a line appears for each task. The index
of the task is its position in the tasks[]
array found in the associated
sp/config/taskTbl*.c file.