International Business Machines Corporation

Seth E Lederer

Hunter J Kauffman

Jeffrey Paul Kubala

David Harold Surman

Jerry A Moody

Jeffrey G Chan

Omkar Ulhas Javeri

Jonathan D Bradbury

Peter Dana Driever

Louis P Gomes

Peter Jeremy Relson

James H Mulder

Muruganandam Somasundaram

Brian K Wade

Alberto Poggesi

Brent J Boisvert

Martin Stock

An instruction that includes an operation code indicating a diagnose operation is obtained and executed within a computing environment. The executing the instruction includes retrieving selected data from a dump save area to be used to restore machine state and restoring the machine state. The restoring includes storing the selected data in a selected location. One or more storage keys used to protect access to the selected data are restored.

Diagnose instruction to restore machine state and associated storage keys

A query operation is performed to obtain information for a select entity of a computing environment. The information includes boost information of one or more boost features currently available for the select entity. The one or more boost features are to be used to temporarily adjust one or more processing attributes of the select entity. The boost information obtained from performing the query operation is provided in an accessible location to be used to perform one or more actions to facilitate processing in the computing environment.

Query and update of processor boost information

A method, computer program product, and system include a processor(s) issues an instruction that includes processing core information that includes locations of processing cores of the computing system (logical cores and/or physical cores), and an operator selection. The processor(s) sets security parameters for information returned by the instruction which is topological information for mapping of the logical cores to the physical cores. The processor(s) obtains the topological information and utilizes an operating system to map the logical cores to the physical cores.

Accessing topological mapping of cores

Logical processor distribution across physical processors is provided. A set of logical processors of a number of logical processors defined for a particular logical partition of a plurality of active logical partitions is assigned to a physical processor chip having a greatest logical processor entitlement for the particular logical partition until no more logical processors can be assigned to that physical processor chip based on a logical processor entitlement of that physical processor chip being exhausted. Remaining logical processors of the number of logical processors defined for the particular logical partition are assigned to other physical processor chips of a plurality of physical processor chips assigned to the particular logical partition until all of the remaining logical processors have been assigned to a physical processor chip.

Distribution of over-configured logical processors

In an approach for isolating physical processors during optimization of virtual machine placement, a server is provided comprising a plurality of containers and a plurality of physical processors. A processor builds a set of bit masks for each type of physical processor required for a logical partition. A processor builds a set of solution spaces based on the plurality of containers and an amount of each type of container of the plurality of containers. A processor completes a combinatorial search of the set of bitmasks and the set of solution spaces. A processor identifies a solution space of the set of solution spaces for the logical partition. The physical and logical configuration of the server is changed based on the solution space for the first logical partition.

Isolating physical processors during optimization of VM placement

Embodiments of the present invention are directed to a computer-implemented method for process management. The method includes assigning a drawer and a physical processor to each element of a first ready queue pointer array, wherein each element of the first ready queue pointer array is configured to point to a memory address of a ready queue header. The method further includes assigning the drawer and the physical processor to each element of a second ready queue pointer array, wherein each element of the second ready queue pointer array is configured to point to the same ready queue header as a respective element of the first ready queue pointer array. The method further includes detecting that either a physical processor has become unavailable to process executable instructions or that a ready queue is empty. The method further includes allocating an available physical processor and a ready queue with executable instructions.

Indirection-based process management

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Staatsburg, NY, United States of America

Seth E Lederer