Terminating access of an agent to a shared resource when a timer

Details Terminating access of an agent to a shared resource when a timer Terminating access of an agent to a shared resource when a timer

1992-12-28

1996-04-09

Lee, Thomas C.

Boots, shoes, and leggings

395860, 3642281, 3642426, 36424291, 3642514, G06F 13364, G06F 13372

Patent

active

055069681

ABSTRACT:
A method and apparatus for very low, in some case even zero, data latency accesses to a shared resource for devices such as disk drives and their channel formatting agents. The method and apparatus together will controllably terminate any non-low-latency access in process and then start a low latency access. Since the computer system has a group of three agents that may require low latency accesses, a special low latency arbitration method and apparatus is provided instead of the normal dynamic time loop arbitration. The low latency arbitration is call zero latency loop arbitration. The method and apparatus can actually provide zero latency data accesses for disk reads and writes in many cases. Once all low latency accesses are fulfilled, the method and apparatus allow the computer system to return to its slower, normal dynamic timed loop arbitration.

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