Method and system for keeping time across a multiprocessor platf

Details Method and system for keeping time across a multiprocessor platf Method and system for keeping time across a multiprocessor platf

1998-05-14

2000-10-24

Butler, Dennis M.

Electrical computers and digital processing systems: support

Synchronization of clock or timing signals, data, or pulses

713500, 713503, G06F 114

Patent

active

061382434

ABSTRACT:
A system, method and computer program are provided for maintaining time accurately and synchronously across a plurality of interconnected processors in a data processing system. Each processor has its own time base register and access to a single time delta variable. Time is reported as the sum of a processor's time base register and the time delta variable. Time base registers are set only at system initialization or boot; thereafter, any system wide time changes are effected by changing only the time delta variable value.

REFERENCES:
patent: 3932847 (1976-01-01), Smith
patent: 4882739 (1989-11-01), Potash et al.
patent: 5504878 (1996-04-01), Coscarella et al.
patent: 5530846 (1996-06-01), Strong
patent: 5701446 (1997-12-01), Abali et al.
patent: 5907685 (1999-05-01), Douceur

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