International Business Machines Corporation

Peter Kenneth Szwed

Peter Dana Driever

Steven G Glassen

Kenneth J Oakes

Harry M Yudenfriend

Peter Grimm Sutton

Richard K Errickson

Mark S Farrell

Thomas Anthony Gregg

Lisa Cranton Heller

Charles W Gainey, Jr

Damian Leo Osisek

Thomas B Mathias

Elpida Tzortzatos

Michael Peter Lyons

David F Craddock

Beth A Glendening

Carl Alfred Bender

Kulwant M Pandey

Leonard W Helmer, Jr

Dan F Greiner

Douglas James Joseph

Ambrose A Verdibello, Jr

Douglas G Balazich

Gustav E Sittmann, Iii

Patrick John Sugrue

Ping T Chan

Guy L Guthrie

Balaram Sinharoy

Bradly George Frey

Cathy May

Gerd Konrad Bayer

Michael Jung

Elke G Nass

Craig A Bickelman

Andrew W Piechowski

Sean Liu

Charles Gainey

Kenneth James Oakes

Steven Gardner Glassen

Harry Yudenfriend

Timothy John Slegel

Christian Jacobi

William John Starke

Ramakrishnan Rajamony

Eric N Lais

David Harold Surman

Peter H Hochschild

Marco Kraemer

John C Dayka

Frank William Brice

Steven N Goss

Michael J Jordan

John Scott Houston

Peter Jeremy Relson

Ugochukwu Charles Njoku

Donald Crabtree

James H Mulder

Klaus Werner

Donald G Grice

Edward W Chencinski

Robert M Abrams

Derrick LeRoy Garmire

Christine M Desnoyers

Kevin J Gildea

Anthony F Coneski

James Richard Coon

Garry Joseph Sullivan

Michael Patrick Muhlada

Andreas Kohler

Richard J Gusefski

Donna C Myers

William R Milani

Ugochukwu Njoku-Charles

Antoinette E Vallone

Vadim M Tsinker

Sheryl M Genco

Oliver G Schlag

Steven G Wilkins

Scott E Davies

Jinghong Ma

Eric Norman Lais

Stephen Glenn Wilkins

Thomas Brian Mathias

Damian Osisek

Charles Gainey Jr

Gustav Iii Sittmann

Anthony Coneski

Jr Charles Gainey

A vector entry of a signaling vector is registered to a buffer summary group. The buffer summary group includes one or more summary indicators for one or more buffers assigned to the buffer summary group. A command is processed that sets a vector indicator in the vector entry and based on setting the vector indicator in the vector entry, a summary indicator of the one or more summary indicators is set in the buffer summary group.

Vector processing employing buffer summary groups

Embodiments include a method of organizing communications channels associated with virtual functions of a single root input and output virtualization (SR-IOV) adaptor. The method includes organizing a first coupling channel according to a first channel path identifier bound to designated communications over a first virtual function of the SR-IOV adaptor allocated according to first virtual function resources that support the first coupling channel. The method also includes enabling access to the first coupling channel to a first guest operating system. The method also includes receiving a teardown command associated with the first coupling channel. The method further includes initiating a reset of the first virtual function that deallocates the first virtual function resources associated the first virtual function.

Channel identifier coupling with virtualized communications hardware

Embodiments include method, systems and computer program products for timing synchronization. Aspects include sending to a remote system a first base packet, the first base packet is sent at a first send event time and then recording the first send event time in a memory. Aspects also include sending to the remote system a second base packet, wherein the payload comprises instructions for the remote computing system and receiving a first remote packet, wherein a payload comprises a first received time indicating a time the first base packet was received. Aspects then include recording the first received time and recording a second received time, wherein the second received time indicates a time the first remote packet was received by the base system. Aspects include receiving a second remote packet, wherein a payload comprises a second sent time indicating a time the first remote packet was sent.

Timing synchronization

An abstraction for storage class memory is provided that hides the details of the implementation of storage class memory from a program, and provides a standard channel programming interface for performing certain actions, such as controlling movement of data between main storage and storage class memory or managing storage class memory.

Configure storage class memory command

Management of storage used by pageable guests of a computing environment is facilitated. A query instruction is provided that details information regarding the storage location indicated in the query. It specifies whether the storage location, if protected, is protected by host-level protection or guest-level protection.

Managing storage protection faults

A computer-implemented method for message handling between a receiver and a sender of a throttling system is provided. The computer-implemented method includes receiving a first message that includes a completion queue element by the receiver from the sender. The computer-implemented method includes detecting that a number of outstanding completion queue elements in a completion queue meets or exceeds a high mark and instructing the sender to enter a throttle mode. The computer-implemented method includes receiving a second message without a completion queue element by the receiver from the sender. The computer-implemented method includes detecting that the number of the outstanding completion queue elements in the completion queue meets or is below a low mark and instructing the sender to exit the throttle mode.

Throttling backbone computing regarding completion operations

Embodiments are directed to a computer system for managing data transfer. The computer system includes a memory, a processor communicatively coupled to the memory, a send component and a receive component having a message queue and a controller. A single link interface communicatively couples the send component to the receive component. The single link interface includes a mainline channel and a sideband channel, and the computer system is configured to perform a method. The method includes transmitting mainline channel messages over the mainline channel from the send component to the receive component. The method further includes transmitting sideband channel messages over the sideband channel from the send component to the message queue of the receive component. The method further includes utilizing the controller to control a flow of the sideband channel messages to the message queue without relying on sending feedback to the send component about the flow.

Remotely controlled message queue

According to one embodiment, a method, computer system, and computer program product for computer networking is provided. The present invention may include a method of using media access control (MAC) multicast procedures to discover remote node addressability, and InfiniBand&#xae; (InfiniBand&#xae; and all InfiniBand&#xae; based trademarks and logos are trademarks or registered trademarks of System I/O, Incorporated and/or its affiliates) protocols to connect sets of queue pairs in implementing one or more communication channels, comprising preparing hardware to connect point-to-point links between a systems; discovering remote systems on the other side of the links through a discovery process; creating administrative traffic lanes; verifying the connection between nodes; initiating the auxiliary traffic flow interface; negotiating and connecting buffers; and exchanging node descriptors.

Method for remote node discovery and communication channel validation and connection

A method, computer program product, and system to control event logging and error recovery in a system including adapters, ports, and channels are described. The method includes storing a recovery threshold for each event type among a plurality of event types and storing a level-specific logging threshold for each event type, implementing event handlers for each of the channels, the ports, and the adapters of the system, and implementing a threshold manager for the events identified by the event handlers based on the level-specific logging threshold and the recovery threshold for each of the respective event types of each of the events. For any identified event corresponding with a given event type, the implementing the threshold manager includes considering the recovery threshold and the level-specific logging threshold at every level regardless of a level at which the identified event is identified.

Event logging and error recovery

Data returned responsive to executing a start subchannel instruction

Embodiments are directed to a computer system for managing data transfer. The computer system includes a memory, a processor communicatively coupled to the memory, a send component and a receive component having a message queue and a controller. A link interface communicatively couples the send component to the receive component. The link interface includes a mainline channel and a sideband channel, and the computer system is configured to perform a method. The method includes transmitting mainline channel messages over the mainline channel from the send component to the receive component. The method further includes transmitting sideband channel messages over the sideband channel from the send component to the message queue of the receive component. The method further includes utilizing the controller to control a flow of the sideband channel messages to the message queue without relying on sending feedback to the send component about the flow.

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Rhinebeck, NY, United States of America

Peter Kenneth Szwed