Timer facility for a stack or operating system

Details Timer facility for a stack or operating system Timer facility for a stack or operating system

2005-04-05

2005-04-05

Miska, Vit W. (Department: 2841)

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

C713S500000, C713S501000, C713S502000

Reexamination Certificate

active

06876601

ABSTRACT:
A method, comprising the steps of receiving a timeout setting, determining a selected timer unit of one of a first timer unit and a second timer unit, wherein a first set of slots is included in the first timer unit and a second set of slots is included in the second timer unit. The selected one of the timer units being determined by determining a maximum time period of the first timer unit based on a number of slots in the first set of slots and a granularity which defines a relationship between each slot in the first set of slots, comparing the timeout setting to the maximum time period of the first timer unit, and incrementing to the second timer unit if the timeout setting is greater than the maximum time period of the first timer unit. Determining one of the first slots and the second slots into which the timeout setting is to be inserted and inserting the timeout setting into the one of the slots.

REFERENCES:
patent: 4942559 (1990-07-01), Fleck et al.
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patent: 5577238 (1996-11-01), Cuny et al.
patent: 5805532 (1998-09-01), Murakami
patent: 6552965 (2003-04-01), Brandt et al.
G. Varghese et al., “Hashed and Hierarchical Timing Wheels: Efficient Data Structures for Implementing a Timer Facility”, IEEE/ACM Transactions on Networking, vol. 5, No. 6, Dec. 1997, pp. 824-834.

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