NonStop Operating System Event Management Programming Manual

System Clock Event Messages (ZCLK)
HP NonStop Operating System Event Management Programming Manual—520372-020
8-19
Messages
(Pre-D20 version) The following four tokens form the fixed-point value of the difference
in time between system time and the processor’s local time:
(D20 and later version) ZCLK-TKN-INTERVAL-WORD specifies the difference in time
between system time and the processor’s local time.
Cause. The reporting processor has deviated enough from system time to be marked
as out of synchronization. This could be caused by a hardware failure or aberrant
software behavior.
At 10-second intervals, the monitor process in each processor checks to see whether
the processor clock is within 100 milliseconds of system time. The monitor generates
one ZCL-EVT-OUTOFSYNC event for each transition from “in sync” to “out of sync”
and reports the size of the error in microseconds.
If a processor does not return to a synchronized state, or if there are many
occurrences of this event in the same processor, assume that there is a hardware
problem in that processor. If this event occurs on different processors, there is probably
a software problem. See Recovery Action Requiring Vendor Support on page 8-7.
Effect. Processes running in the specified processor obtain timestamps that differ from
the system time by at least 100 milliseconds.
Recovery. Monitor the event messages to determine whether the problem persists. If
the system adjustments do not bring the processor time back into synchronization, see
Recovery Action Requiring Vendor Support on page 8-7.
109: ZCLK-EVT-PONRESYNC
A processor’s time has been adjusted to reflect the new system time after a power
failure.
Token Description
ZCLK-TKN-INTERVAL-W-0 Word 0 of the fixed value.
ZCLK-TKN-INTERVAL-W-1 Word 1 of the fixed value.
ZCLK-TKN-INTERVAL-W-2 Word 2 of the fixed value.
ZCLK-TKN-INTERVAL-W-3 Word 3 of the fixed value.
Subject: ZCLK-TKN-CPU
Potentially critical event: No
Action event: No
Message sender: Monitor process
TMDS collector: Yes
OSM/TSM collector: Yes