Reducing interprocessor communications pursuant to updating of a storage key
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United States of America Patent
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Aug 13, 2013
Grant Date -
Jun 16, 2011
app pub date -
Dec 14, 2009
filing date -
Dec 14, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
Processing within a multiprocessor computer system is facilitated by: deciding by a processor, pursuant to processing of a request to update a previous storage key to a new storage key, whether to purge the previous storage key from, or update the previous storage key in, local processor cache of the multiprocessor computer system. The deciding includes comparing a bit value(s) of one or more required components of the previous storage key to respective predefined allowed stale value(s) for the required component(s), and leaving the previous storage key in local processor cache if the bit value(s) of the required component(s) in the previous storage key equals the respective predefined allowed stale value(s) for the required component(s). By selectively leaving the previous storage key in local processor cache, interprocessor communication pursuant to processing of the request to update the previous storage key to the new storage key is minimized.
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