Processors

STM: Lock-Free Synchronization

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Executive Summary

Current parallel programming uses low-level programming constructs like threads and explicit synchronization (for example, locks, semaphores and monitors) to coordinate thread execution which makes these programs difficult to design, program and debug. In this paper, the authors present Software Transactional Memory (STM) which is a promising new approach for programming in parallel processors having shared memory. It is a concurrency control mechanism that is widely considered to be easier to use by programmers than other mechanisms such as locking. It allows portions of a program to execute in isolation, without regard to other, concurrently executing tasks.

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