International Business Machines Corporation

Leslie W Wyman

Kenneth J Oakes

Tan Lu

Janet R Easton

Harry M Yudenfriend

Damian Leo Osisek

Richard P Tarcza

John S Trotter

Dale Francis Riedy, Jr

Scott M Carlson

Jeffrey Paul Kubala

Greg A Dyck

William J Rooney

Frank William Brice

Marten J Halma

William Alan Holder

Charles W Gainey, Jr

Gustav E Sittmann, Iii

Charles E Shapley

Steven G Glassen

Bernd Nerz

Eugene P Hefferon

Donald W Schmidt

Hans-Helge Lehmann

Allan Samuel Meritt

Roger E Hough

Frank W Brice

Lisa Cranton Heller

Bruce H Ratcliff

Arthur James Stagg

Michael E Baskey

Brenton F Belmar

Robert R Rogers

Kenneth J Fredericks

Charles Franklin Webb

Robert Edward Galbraith

Beth A Glendening

Peter Jeremy Relson

Bernard R Pierce

Gary Stuart Puchkoff

Donald Fred Ault

Peter H Gum

David E Stucki

Gustav E Sittman, Iii

Jose R Castano

Suzanne M John

Robert J Maddison

James C Mazurowski

Dan F Greiner

Moon Jung Kim

Daniel Francis Casper

Stephen R Valley

Erwin F Pfeffer

Jaya Srikrishnan

Geoffrey Owen Blandy

Casper A Scalzi

Allen H Preston

Donald W McCauley

Richard Cwiakala

Assaf Marron

John C Rathjen, Jr

John Fenton Scanlon

Ugochukwu Njoku-Charles

David W Hollar

Mark S Farrell

Jeffrey Mark Nick

Robert J Dugan

James H Mulder

Joseph C Elliott

Carol B Hernandez

Martin W Sachs

Anthony R Sager

Richard Roland Guyette

Roger L Cormier

Terry L Borden

Francis E Johnson

Juergen Erwin Maergner

Robert A Smith

Mark A Wisniewski

Norman C Chou

Richard J Schmalz, Deceased

Paul A Malinowski

George H Bean

Steven Messinger

Ugochukwo Njoku-Charles

Miriam P Brown

Michael G Melendy

Mark E Rakhmilevich

Donald W Mccauley

John C Rathjen

John F Scanlon

Input/output (I/O) operation requests from pageable storage mode guests are interpreted without host intervention. In a pageable mode virtual environment, requests issued by pageable storage mode guests are processed by one or more processors of the environment absent intervention from one or more hosts of the environment. Processing of the requests includes manipulating, by at least one processor on behalf of the guests, buffer state information stored in host storage. The manipulating is performed via instructions initiated by the guests and processed by one or more of the processors.

Set buffer state instruction

Interpreting I/O operation requests from pageable guests without host intervention

An Extended Input/output (I/O) measurement word facility is provided. Provision is made for emulation of the Extended I/O measurement word facility. The facility provides for storing measurement data associated with a single I/O operation in an extended measurement word associated with an I/O response block. In a further aspect, the stored data may have a resolution of approximately one-half microsecond.

Extended input/output measurement word facility for obtaining measurement data in an emulated environment

Aspects include a system, method and computer program product for providing a shared memory translation facility. The method includes receiving a request for access to a memory address from a requestor at a configuration, the receiving at a shared memory translation mechanism. It is determined whether the memory address refers to a shared memory object (SMO), the SMO accessible by a plurality of configurations managed in different zones of memory. Based on determining that the memory address refers to the SMO, it is determined whether the configuration has access to the SMO. Based on determining that the configuration has access to the SMO, the requestor is provided a system absolute address for the SMO and access to the SMO. In this manner direct interchange of data between the configuration and the plurality of configurations is allowed.

Shared memory translation facility

Host page management assist functions are employed to manage storage of a pageable mode virtual environment. These functions enable storage to be managed by a processor of the environment absent intervention of a host of the environment. The functions include a resolve host page function; a pin function; and unpin functions.

Facilitating management of storage of a pageable mode virtual environment absent intervention of a host of the environment

Extended input/output measurement word facility for obtaining measurement data

A system, method and computer program product for providing a shared memory translation facility. The method includes receiving a request for access to a memory address from a requestor at a configuration, the receiving at a shared memory translation mechanism. It is determined if the memory address refers to a shared memory object (SMO), the SMO accessible by a plurality of configurations. In response to determining that the memory address refers to the SMO, it is determined if the configuration has access to the SMO. In response to determining that the configuration has access to the SMO, the requestor is provided a system absolute address for the SMO and access to the SMO. In this manner direct interchange of data between the plurality of configurations is allowed.

Providing a shared memory translation facility

Exemplary embodiments include a system and storage medium for managing computer processing functions in a multi-processor computer environment. The system includes a physical processor, a standard logical processor, an assist logical processor sharing a same logical partition as the standard logical processor, and a single operating system instance associated with the logical partition, the single operating system instance including a switch-to service and a switch-from service. The system also includes a dispatch component managed by the single operating system instance. Upon invoking the switch-to service by standard code, the switch-to service checks to see if an assist logical processor is online and, if so, it updates an integrated assist field of a work element block associated with the task for indicating the task is eligible to be executed on the assist logical processor. The switch-to service also assigns a work queue to the work element block.

Method, system, and storage medium for managing computer processing functions

Growing community of inventors

Poughkeepsie, NY, United States of America

Leslie W Wyman