Patent · US Active

Method and system for state tracking and recovery in multiprocessing computing systems

US7996585B2 · kind B2 · utility

0Cited by

24References

19Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Janet R. Easton · Woodstock, US
Elke G. Nass · Ehningen, DE
Kenneth J. Oakes · Wappingers Falls, US
Andrew W. Piechowski · Lagrangeville, US
Martin Taubert · Schrobenhausen, DE
John S. Trotter · Pleasant Valley, US
Ambrose A. Verdibello, Jr. · Millbrook, US
Joachim von Buttlar · Schenefeld, DE
Robert M. Whalen, Jr. · Tivoli, US

Key dates

Filing date	Sep 9, 2005
Grant date	Aug 9, 2011
Priority date	—
Expiry date	Jul 3, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG06F11/0766
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Disclosed are a method and system of tracking real time use of I/O control blocks on a processing unit basis, in a multiprocessing system, such that in the case of a processing unit failure, a list accurately and concisely identifies the control blocks that need to be recovered. This eliminates the need to scan all the I/O control blocks, greatly reducing the overall system recovery time and minimizing impact to the rest of the running system. The preferred embodiment of the invention uses a task control block structure to record which I/O control blocks are in use by each Processing Unit. Also, the lock word structure defined in the I/O control blocks is provided with an index back into the task control block to facilitate managing the task control block entries.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.