Wait
CP Disabled Wait
No processing occurs in the virtual machine when it is in a wait state. When the
wait state is an enabled one, anI/O interrupt causes processing to resume. Like
wise, when the ControlProgram is in a wait state, its processing ceases.
A disabled wait state usually results from a hardware malfunction. During theIPL process, normally correctable hardware errors may cause a wait state because the
operating system error recovery procedures are not accessible at this point. These
conditions are recorded in the currentPSW. CP may be in an enabled wait state with channel a disabled when it is attempting
to acquire more free storage. Examine EC register 2 to see whether or not the
multiplexer channel is disabled. A severe machine check could also cause aCP dis
abled wait state.
Three types of severe machine checks can cause theVM/SP Control Program to
terminate or cause aCP disabled wait state.
An unrecoverable machine check in the control program• A machine check that cannot be diagnosed
Timing facilities damage
A machine check error cannot be diagnosed if either the machine check oldPSW or
the machine check interrupt code is invalid. These severe machine checks cause
the control program to terminate.
If a severe machine check or channel check caused aCP disabled wait state, one of
the following messages appears:
DMKCCH603 CHANNELERROR, RUN SEREP, RESTART SYSTEM
DMKMCH612W MACHINE CHECK TIMING FACILITIES DAMAGE;RUN SEREP
DMKMCT612W MACHINE CHECK TIMING FACILITIES DAMAGE;RUN SEREP
If an unrecoverable machine check occurs in the control program, the message
DMKMCH610W MACHINE CHECKSUPERVISOR DAMAGE
--or--
DMKMCT610W MACHINE CHECKSUPERVISOR DAMAGE
appears on the processor console. The control program is terminated and enters a
wait state001 or wait state 013. If the machine check handler cannot diagnose a certain machine check, the integri
ty of the system is questionable. The message
DMKMCH611W MACHINE CHECK SYSTEM INTEGRITYLOST --or--
DMKMCT611W MACHINE CHECK SYSTEM INTEGRITYLOST Introduction to Debugging 485
CP Disabled Wait
No processing occurs in the virtual machine when it is in a wait state. When the
wait state is an enabled one, an
wise, when the Control
A disabled wait state usually results from a hardware malfunction. During the
operating system error recovery procedures are not accessible at this point. These
conditions are recorded in the current
to acquire more free storage. Examine EC register 2 to see whether or not the
multiplexer channel is disabled. A severe machine check could also cause a
abled wait state.
Three types of severe machine checks can cause the
terminate or cause a
An unrecoverable machine check in the control program
Timing facilities damage
A machine check error cannot be diagnosed if either the machine check old
the machine check interrupt code is invalid. These severe machine checks cause
the control program to terminate.
If a severe machine check or channel check caused a
the following messages appears:
DMKCCH603 CHANNEL
DMKMCH612W MACHINE CHECK TIMING FACILITIES DAMAGE;
DMKMCT612W MACHINE CHECK TIMING FACILITIES DAMAGE;
If an unrecoverable machine check occurs in the control program, the message
DMKMCH610W MACHINE CHECK
--or--
DMKMCT610W MACHINE CHECK
appears on the processor console. The control program is terminated and enters a
wait state
ty of the system is questionable. The message
DMKMCH611W MACHINE CHECK SYSTEM INTEGRITY
DMKMCT611W MACHINE CHECK SYSTEM INTEGRITY