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In page Transactional memory:
"Sun Microsystems implemented hardware transactional memory and a limited form of speculative multithreading in its high-end Rock processor. This implementation proved that it could be used for lock elision and more complex hybrid transactional memory systems, where transactions are handled with a combination of hardware and software. The Rock processor was canceled in 2009, just before the acquisition by Oracle; while the actual products were never released, a number of prototype systems were available to researchers.[1]
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