Deadlock avoidance in a bus fabric
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United States of America Patent
Stats
-
Aug 26, 2008
Grant Date -
Jul 12, 2007
app pub date -
Feb 12, 2007
filing date -
Apr 1, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Circuits, apparatus, and methods for avoiding deadlock conditions in a bus fabric. One exemplary embodiment provides an address decoder for determining whether a received posted request is a peer-to-peer request. If it is, the posted request is sent as a non-posted request. A limit on the number of pending non-posted requests is maintained and not exceed, such that deadlock is avoided. Another exemplary embodiment provides an arbiter that tracks a number of pending posted requests. When the number pending posted requests reaches a predetermined or programmable level, a Block Peer-to-Peer signal is sent to the arbiter's clients, again avoiding deadlock.
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Cited Art Landscape
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