International Business Machines Corporation

Dan Vangor

Bruce H Ratcliff

Jerry Wayne Stevens

Stephen R Valley

Patricia G Driever

Richard Mark Sczepczenski

Richard P Tarcza

Michael James Becht

Girish Gopala Kurup

George Kuch

Howard M Haynie

Mushfiq U Saleheen

Luke M Hopkins

Mahmoud Amin

Ying-Yeung Li

Francis Gassert

Daniel Hughes

Myron Wisniewski

Pascal R Bastien

Margaret Dubowsky

Margaret Frances Kaelin Dubowsky

Anmar A Al Zubaydi

Deepankar Bhattacharjee

Luke Hopkins

Embodiments of the present disclosure implement hardware-based snoop logic streaming timers for input/output (I/O) communications between a host and a shared network adapter in a computing system. The disclosed embodiments describe a hardware-based snoop logic and snoop logic timer function control of input/output (I/O) processor monitoring a defined memory area to detect a completion queue entry being written to a completion queue, and implementing streaming timers and interpacket timers, based on the completion queue entry and predefined configuration information for an associated host interface connection, to provide streaming data status, interpacket arrival times, and streaming timer expiration for the associated host interface connection.

Snoop logic function streaming timers

Systems and techniques for snooping input/output (I/O) events in a computing system are described. An example technique includes obtaining a configuration comprising a plurality of snoop space profiles, each snoop space profile indicating a respective range of memory addresses that map to a respective completion queue. The technique also includes monitoring input/output (I/O) traffic exchanged across a communication interface between an I/O adapter and a processor in a computing system, based on the configuration. The technique further includes performing one or more actions to assist processing of the I/O traffic, based in part on the monitoring.

Address based hardware snoop logic with configurable snoopable space settings for hardware assist

Embodiments herein describe techniques for establishing data constructs for a data device that enable communication between a host and a shared adapter. A shared adapter facilitates communication with one or more hosts coupled to a NIC. To do so, a host can establish the data device in each operating system that wishes to communicate with the shared adapter. This can include establishing data constructs such as storage block pages, queue indexes, and interrupt registers in the host memory. The host can then transmit a queue description record (QDR) to the shared adapter so the adapter can configure the queues and has the addresses of the data constructs in the host memory.

Data constructs for a shared network adapter

The embodiments herein describe configuring a data device that enables communication between a host and a shared network adapter. The data device can include data connections between the host and the shared network adapter. The data device can have both control queues in a control plane and data queues in a data plane. The control queues can be activated first in order to issue control commands to configure the data plane in the shared network adapter.

Configuration of data connections between a host and a shared network adapter

Aspects of the invention include receiving an error code describing a computer hardware or firmware error. A list of data items to be collected to assist in correcting the error is received. The contents of the list are selected based at least in part on the error code and are in priority order. The data items in the list are collected and a buffer to store the collected data items is selected. At least a subset of the collected data items to be written is transmitted to the buffer. All of the collected data items are transmitted to the buffer when the buffer is large enough to hold all of the data items in the list. A subset of the collected data items are transmitted to the buffer in priority order when the buffer is not large enough to hold all of the data in the list.

Dynamic logging and prioritization of error incident data

Aspects of the invention include receiving an error code describing a computer hardware or firmware error. A list of data items to be collected to assist in correcting the error is built. The contents of the list are selected based at least in part on the error code and are in priority order. The data items in the list are collected and a buffer to store the collected data items is selected. At least a subset of the collected data items to be written is transmitted to the buffer. All of the collected data items are transmitted to the buffer when the buffer is large enough to hold all of the data items in the list. A subset of the collected data items are transmitted to the buffer in priority order when the buffer is not large enough to hold all of the data in the list.

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Mahopac, NY, United States of America

Dan Vangor