DYNAMIC DETECTION AND SOFTWARE CORRECTION OF INCORRECT LOCK AND ATOMIC UPDATE HINT BITS

DYNAMIC DETECTION AND SOFTWARE CORRECTION OF INCORRECT LOCK AND ATOMIC UPDATE HINT BITS

A hint bit detection and correction method uses two additional bits as part of every cache directory. These bits represent the lwarx and stwcx instructions (larx disp, stcx disp). When a hint bit event occurs, depending the on combination of these two bits, there can be an indication of a hint bit e...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Nowak Benjamin Carter, Indukuru Venkat R, Guthrie Guy Lynn
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:A hint bit detection and correction method uses two additional bits as part of every cache directory. These bits represent the lwarx and stwcx instructions (larx disp, stcx disp). When a hint bit event occurs, depending the on combination of these two bits, there can be an indication of a hint bit error. Once a hint bit error is detected a software interrupt is issued and the hint bit correction method identifies and corrects the incorrect hint bit.