ARQ entry for RTP session data request (Part 1)
- Entry:
- ARQ
- VIT option:
- HPR
- Event:
- Any session data request is received over an RTP connection using Responsive Mode ARB
- VIT processing module:
- ISTITCHR
- Control is returned to:
- ISTRPCAR
This trace record is written when session data is received
across an RTP connection using Responsive Mode ARB. It contains statistical
information about the session data.
- Byte (hex)
- Contents
- 00–02
- Record ID: C"ARQ"
- 03
- Trace instance
- Code
- Meaning
- C
- Computer (values before computer code executes).
- D
- Drift detected.
- N
- Entry (values on entry).
- R
- Drift reduction.
- X
- Exit (values on exit).
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.
- 05
- 0
- 06–07
-
- Code
- Meaning
- N, X
- Phase flags (ARB2_PHASE_FLAGS, ARB2_PHASE_FLAGS2).
- C
- Window size (ARB2_POT_WINDOW_SIZE).
- D, R
- 0
Phase flags:- Bit
- Meaning
- 1... .... .... ....
- Conservation phase
- .1.. .... .... ....
- Medium aggressive phase
- ..1. .... .... ....
- Send setup segment
- ...1 .... .... ....
- High flag
- .... 1... .... ....
- Delay change sum flag
- .... .1.. .... ....
- Upward cycle flag
- .... ..1. .... ....
- Idle - no data has been sent recently
- .... ...1 .... ....
- Startup
- .... .... 1... ....
- Last parity bit received on an ARB rate request
- .... .... .1.. ....
- Current ARB request parity bit
- .... .... ..11 1111
- Not used
- 08–0B
-
- Code
- Meaning
- C, N, X
- Receiver threshold in microseconds (ARB2_POT_RCVR_THRESHOLD).
- D
- Current accumulated queuing time in microseconds (ARBLV_CLOCK_DRIFT). This is the minimum of the ACCUM QUEUING TIME and DCS BAR.
- R
- Current accumulated queuing time in microseconds (ARBLV_CLOCK_DRIFT). This is the absolute value of ACCUM QUEUING TIME plus 1500 microseconds.
- 0C–0F
-
- Code
- Meaning
- C, N, X
- Maximum present threshold in microseconds (ARB2_POT_PRESENT_THR_MAX).
- D
- Elapsed time, in microseconds, since a drift condition was detected.
- R
- ACCUM QUEUING TIME has been rounded back to 0.
- 10–13
-
- Code
- Meaning
- C
- Minimum present threshold in microseconds (ARB2_POT_PRESENT_THR_MIN).
- N, X
- Anticipated variance in milliseconds (ARB2_POT_ANTICIPATED_VAR).
- D, R
- Amount of clock drift, measured in microseconds, allowed per second.
- 14–17
-
- Code
- Meaning
- C
- Delay change sum variance.
- N, X
- Delay change sum bar in microseconds (ARB2_POT_DCS_BAR).
- D, R
- This value has a range of 2 to 20000. The default is 20000, which is associated with a drift of 50 microseconds per second. The drift rate, in microseconds, can be determined by dividing one million by the ARB_DRIFT_FACTOR.
- 18–1B
- NCB address
- 1C–1F
- Request parameter header (RPH) address