Apparatus and method for deadlock avoidance
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United States of America Patent
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Nov 13, 2018
Grant Date -
Mar 17, 2016
app pub date -
Oct 13, 2015
filing date -
Nov 9, 2012
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Abstract
An improved method for the prevention of deadlock in a massively parallel processor (MPP) system wherein, prior to a process sending messages to another process running on a remote processor, the process allocates space in a deadlock-avoidance FIFO. The allocated space provides a “landing zone” for requests that the software process (the application software) will subsequently issue using a remote-memory-access function. In some embodiments, the deadlock-avoidance (DLA) function provides two different deadlock-avoidance schemes: controlled discard and persistent reservation. In some embodiments, the software process determines which scheme will be used at the time the space is allocated.
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