- Entry:
- HCLK
- VIT option:
- HPR
- Event:
- HPR clock event
- VIT processing module:
- ISTITCHP
- Control is returned to:
- ISTRPCTM
This trace record is written when the clock state changes
(approximately every second). This trace record is also written when
the clock mode changes. 
- Byte (hex)
- Contents
- 00–03
- Record ID: C"HCLK"
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.
- 05
- 0
- 06
- Old HPR clock state
- P
- Pending stop
- R
- Running
- S
- Stopped
- 07
- New HPR clock state
- P
- Pending stop
- R
- Running
- S
- Stopped
- 08–0F
- Time stamp of HCLK entry
- 10–13
- Total number of 25 millisecond timers currently on the HPR clock
- 14–17
- Number of liveness timers on the HPR clock
- 18–1B
- Number of timers on the late queue
- 1C–1F
- Request parameter header (RPH) address