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Sun’s research report on Hardware Transactional Memory

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Sun have released a technical report on Transactional Memory, based on their experiences with the (now sadly canned) ROCK processor. “Early Experience with a Commercial Hardware Transactional Memory Implementation” is available as a free download from Sun’s research website – you can grab it at http://research.sun.com/techrep/2009/abstract-180.html

From the abstract:

We report on our experience with the hardware transactional memory (HTM) feature of two revisions of a prototype multicore processor. Our experience includes a number of promising results using HTM to improve performance in a variety of contexts, and also identifies some ways in which the feature could be improved to make it even better. We give detailed accounts of our experiences, sharing techniques we used to achieve the results we have, as well as describing challenges we faced in doing so. This technical report expands on our ASPLOS paper [9], providing more detail and reporting on additional work conducted since that paper was written.

Anyone who’s interested in High Performance Computing (HPC) or performance gains from Transactional Memory should have a read through this paper – it’s interesting stuff.

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