Agitating – Rubber or heavy plastic working – With specified feed means
Patent
1993-10-22
1994-08-23
Dixon, Joseph L.
Agitating
Rubber or heavy plastic working
With specified feed means
366DIG1, 3662443, 3662468, 3662281, 3662302, 3662808, 3662841, 3662845, G06F 1214
Patent
active
053414918
ABSTRACT:
A lockout avoidance circuit is provided for a plurality of nodes which generate lock requests for a shared resource such as a memory location. The circuit insures that lock requests are eventually satisfied. A lock queue includes a plurality of registers pipelined together. Lock requests only enter the lock queue if they are refused access to a shared resource a predetermined number of times. A first register is the head of the queue and the last register is the bottom of the queue. An enabling circuit allows the queue to store in the registers lock requests received from the different nodes in the order in which they are initially refused service. The enabling circuit operates the queue by pushing the stored lock requests toward the head of the queue each time the head entry in the queue is serviced. The lockout avoidance circuit is implemented at each level of the system wherein a lockout condition can occur.
REFERENCES:
patent: 4897786 (1990-01-01), Pimm et al.
patent: 4937733 (1990-06-01), Gillett, Jr. et al.
patent: 5050066 (1991-09-01), Myers et al.
patent: 5060144 (1991-10-01), Sipple et al.
patent: 5068781 (1991-11-01), Gillett, Jr. et al.
patent: 5161227 (1992-11-01), Dias et al.
patent: 5175837 (1992-12-01), Arnold et al.
Kelter, Udo, Information Systems "Deadlock-Freedom of Large Transactions In Object Management Systems," vol. 14, No. 2, pp. 175-180, (1989) Dortmund, Germany.
Anderson et al., Performance Evaluation Review, "The Performance Implications of Thread Management Alternatives For Stored Memory Multiprocessors," vol. 17, No. 1, pp. 49-60, (May 1989) Berkeley, USA.
Digital Equipment Corporation
Dixon Joseph L.
Maloney Denis C.
Nguyen Hiep T.
Paciulan Richard J.
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