摘要:
Two forms of TOD Clock instructions are provided, Store Clock and Store Clock Fast. Execution of the Store Clock Fast instruction may produce a time of day (TOD) result that is exactly the same as a previous TOD result, however execution of Store Clock Fast instructions while the clock is running always produce unique TOD results.
摘要:
A method is provided for obtaining time-of-day (“TOD”) clock records on an information processing system. In accordance with such method, a first instruction is issued for recording a TOD clock value. In response to issuing the first instruction, a truncated version of a first current TOD clock value is obtained and recorded as a first TOD clock record, the first TOD clock value being a first current TOD clock value produced by a TOD clock running continuously on the information processing system. Thereafter, a second instruction is issued. In response to issuing the second instruction, a truncated version of a second current TOD clock value is obtained and recorded as a second TOD clock record, the second current TOD clock value being produced by the TOD clock, and the second TOD clock record being permitted to have the same value as the first TOD clock record.
摘要:
A method is provided for recording a list of facilities available to a program executing on an information processing system. In such method a storage location and a length of data are defined for recording the list of facilities by a program being executed on the information processing system. An instruction is issued by the program for determining the available facilities and recording the list of available facilities in accordance with the defined storage location and data length. A processor executes the instruction to determine the available facilities and record the list of facilities in accordance with the defined storage location and defined data length. The recorded list of facilities can then be read by the first program.
摘要:
A method is provided for recording a list of facilities available to a program executing on an information processing system. In such method a storage location and a length of data are defined for recording the list of facilities by a program being executed on the information processing system. An instruction is issued by the program for determining the available facilities and recording the list of available facilities in accordance with the defined storage location and data length. A processor executes the instruction to determine the available facilities and record the list of facilities in accordance with the defined storage location and defined data length. The recorded list of facilities can then be read by the first program.
摘要:
One or more registers used to form an address usable in accessing storage are examined to determine if a zero address event has occurred in forming the address. In response to an indication that a zero address event has occurred in address formation, an alert is provided to the program using the address to access storage.
摘要:
One or more registers used to form an address usable in accessing storage are examined to determine if a zero address event has occurred in forming the address. In response to an indication that a zero address event has occurred in address formation, an alert is provided to the program using the address to access storage.
摘要:
Management of storage used by pageable guests of a computing environment is facilitated. An enhanced suppression-on-protection facility is provided that enables the determination of which level of protection (host or guest) caused a fault condition, in response to an attempted storage access.
摘要:
An authorization mechanism allows a host executing a guest operating system to grant permission for the guest to directly access an adapter function's address spaces without host intervention. This access is via instructions implemented based on the architecture of the adapter function. The host also has the capability to intervene in the execution of the instruction, if desired.
摘要:
Embodiments of the invention relate to monitoring processor characteristic information of a processor using run-time-instrumentation. An aspect of the invention includes executing an instruction stream on the processor and detecting a run-time instrumentation sample point of the executing instruction stream on the processor. A reporting group is stored in a run-time instrumentation program buffer based on the run-time instrumentation sample point. The reporting group includes processor characteristic information associated with the processor.
摘要:
Management of storage used by pageable guests of a computing environment is facilitated. An enhanced suppression-on-protection facility is provided that enables the determination of which level of protection (host or guest) caused a fault condition, in response to an attempted storage access.