Boots – shoes – and leggings
Patent
1994-05-11
1997-03-18
Shah, Alpesh M.
Boots, shoes, and leggings
395838, 395856, 364230, 3642383, 364260, 364DIG1, G06F 1300
Patent
active
056131399
ABSTRACT:
A parallel computing system includes multiple nodes, each node including a processor with software control. The parallel computing system includes a distributed lock mechanism that controls access to system resources, the lock mechanism distributed among the multiple nodes, with each node including hardware-based lock processing apparatus. Such apparatus comprises a communication interface for receiving and transmitting control and data messages and a table arrangement for storing plural lock words. A state machine is present in each node and is connected to the table arrangement and to the communications interface and is responsive to a received lock request to perform hardware-controlled lock processing functions. Those functions include: reading a stored lock word from the table arrangement; performing the lock operation on the stored lock word according to parameters in the received lock request; compiling a message which grants the lock request if the comparison indicates a match, or a message denying the lock request if the comparison indicates a non-match, or a message indicating completion of a specified operation. The state machine performs the function without invoking the processor and/or its software control, thereby enabling lock grant/denial/information messages to be handled independently of software controlled processor procedures.
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International Business Machines - Corporation
Shah Alpesh M.
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