International Business Machines Corporation

Robert R Rogers

Jeffrey Paul Kubala

Bernard R Pierce

Donald W Schmidt

Charles W Gainey, Jr

James H Mulder

Mark S Farrell

Dan F Greiner

Timothy John Slegel

Christian Jacobi

Leslie W Wyman

Peter Jeremy Relson

Gary Stuart Puchkoff

Greg A Dyck

Donald Fred Ault

Jose R Castano

Robert J Maddison

Mark A Wisniewski

Robert W StJohn

Damian Leo Osisek

Peter Bergersen Yocom

Jeffrey Alan Frey

Harris M Morgenstern

Charles E Mari

Danny R Sutherland

Donald Francis Ferguson

Roman Anthony Bobak

Ted Eric Blank

Angelo Pruscino

Erhard Rahm

Jim H Mulder

Donald William Schmidt

Charles Gainey Jr

Pierce Bernard

Gustav Sittmann

Charles Gainey

Jim Mulder

Execution of instructions in a transactional environment is selectively controlled. A TRANSACTION BEGIN instruction initiates a transaction and includes controls that selectively indicate whether certain types of instructions are permitted to execute within the transaction. The controls include one or more of an allow access register modification control and an allow floating point operation control.

Selectively controlling instruction execution in transactional processing

A program (e.g., an operating system) is provided a warning that it has a grace period in which to perform a function, cleanup (e.g., complete, stop and/or move a dispatchable unit). The program is being warned, in one example, that it is losing access to its shared resources. For instance, in a virtual environment, a guest program is warned that it is about to lose its central processing unit resources, and therefore, it is to perform a function, such as cleanup.

Warning track interruption facility

A program (e.g., an operating system) is provided a warning that it has a grace period in which to perform a function, such as cleanup (e.g., complete, stop and/or move a dispatchable unit). The program is being warned, in one example, that it is losing access to its shared resources. For instance, in a virtual environment, a guest program is warned that it is about to lose its central processing unit resources, and therefore, it is to perform a function, such as cleanup.

Use of a warning track interruption facility by a program

Providing by one program to another program access to a warning track facility

An embodiment provides for operating an information processing system. An aspect of the invention includes allocating an execution interval to a first logical processor of a plurality of logical processors of the information processing system. The execution interval is allocated for use by the first logical processor in executing instructions on a physical processor of the information processing system. The first logical processor determines that a resource required for execution by the first logical processor is locked by another one of the other logical processors. An instruction is issued by the first logical processor to determine whether a lock-holding logical processor is currently running. The lock-holding logical processor waits to release the lock if it is currently running. A command is issued by the first logical processor to a super-privileged process for relinquishing the allocated execution interval by the first logical processor if the locking holding processor is not running.

Determination of running status of logical processor

A monitoring facility that is operable in two modes allowing compatibility with prior existing monitoring facilities. In one mode, in response to encountering a monitored event, an interrupt is generated. In another mode, in response to encountering a monitored event, one or more associated counters are incremented without causing an interrupt.

Monitoring events and incrementing counters associated therewith absent taking an interrupt

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Poughkeepsie, NY, United States of America

Robert R Rogers