International Business Machines Corporation

Christopher Tung Phan

David Dean Sanner

Daniel Morgan Crowell

Duane Arlyn Averill

Thi Ngoc Tran

Alan Hlava

Zane Coy Shelley

Corey Virgil Swenson

Sharon Denos Vincent

Anh-Tuan Nguyen Hoang

In response to a notification of a fault captured in a system, a fault isolator serially analyzes each clock object to determine captured faults associated with the clock object. For each of the clock objects determined to have a captured fault, the fault isolator initiates a repair action for the chip represented by the clock object. The fault isolator concurrently analyzes the non-clock objects to determine captured faults associated with the non-clock objects after analysis of the clock objects. For each of the non-clock objects determined to have a captured fault, the fault isolator initiates a repair action for the chip represented by the non-clock object.

Fault isolation with abstracted objects

Performance in object-oriented systems may be improved by allowing multiple concurrent hardware control and diagnostic operations to run concurrently on the system while preventing race conditions, state/data corruption, and hangs due to deadlock conditions. Deadlock prevention rules may be employed to grant or deny request for hardware operation locks, hardware communication locks, and/or data locks.

Making hardware objects and operations thread-safe

According to one embodiment of the present invention, multiple data scan operations are compacted into a single network message. A plurality of requests to perform a data scan operation on a remote node controller is received, forming a set of received data scan operation requests. A set of data scan operations are generated based on the set of received data scan operation requests, forming a set of generated data scan operations. A network message comprising the set of generated data scan operations is generated, forming a first compacted data scan operation network message. The first compacted data scan operation network message is sent to the remote node controller. A second compacted data scan operation network message is received from the remote node controller, wherein the second compacted data scan operation network message comprises a set of completed data scan operations. The set of completed data scan operations are separated into individual completed data scan operations. Each individual completed data scan operation is sent to the user that issued the request.

Performance and reduce network traffic for remote hardware data scan operations

A method for allowing simultaneous parameter-driven and deterministic simulation during verification of a hardware design, comprising: enabling a plurality of random parameter-driven commands from a random command generator to execute in a simulation environment during verification of the hardware design through a command managing device; and enabling a plurality of deterministic commands from a manually-driven testcase port to execute in the simulation environment simultaneously with the plurality of random parameter-driven commands during verification of the hardware design through the command managing device, the plurality of deterministic commands and the plurality of random parameter-driven commands each verify the functionality of the hardware design.

Simultaneous parameter-driven and deterministic simulation with or without synchronization

Exemplary embodiments include a multiprocessor system including: a plurality of processors in operable communication with an address manager and an memory controller; and a unified cache in operable communication with the address manager, wherein the unified cache includes: a plurality of cache addresses; a cache data corresponding to each cache address; a data mask corresponding to each cache data; a plurality of cache agents corresponding to each cache address; and a cache state corresponding to each cache agent.

Growing community of inventors

Rochester, MN, United States of America

Christopher Tung Phan