Mitigating conflicts for shared cache lines
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United States of America Patent
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Jan 6, 2015
Grant Date -
Dec 19, 2013
app pub date -
Jun 14, 2012
filing date -
Jun 14, 2012
priority date (Note) -
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Abstract
A computer program product for mitigating conflicts for shared cache lines between an owning core currently owning a cache line and a requestor core. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method. The method includes determining whether the owning core is operating in a transactional or non-transactional mode and setting a hardware-based reject threshold at a first or second value with the owning core determined to be operating in the transactional or non-transactional mode, respectively. The method further includes taking first or second actions to encourage cache line sharing between the owning core and the requestor core in response to a number of rejections of requests by the requestor core reaching the reject threshold set at the first or second value, respectively.
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