Reactive Spin-locks: A Self-tuning Approach
Rapport, 2005

Reactive spin-lock algorithms that can automatically adapt to contention variation on the lock have received great attention in the field of multiprocessor synchronization, since they can help applications achieve good performance in all possible contention conditions. However, in existing reactive spin-locks the reaction relies on (i) some "fixed" experimentally tuned thresholds, which may get frequently inappropriate in dynamic environments like multiprogramming/multiprocessor systems, or (ii) known probability distributions of inputs. This paper presents a new reactive spin-lock algorithm that is completely self-tuning, which means no experimentally tuned parameter nor probability distribution of inputs are needed. The new spin-lock is based on both synchronization structures of applications and a competitive online algorithm. Our experiments, which use the Spark98 kernels and the SPLASH-2 applications as application benchmarks, on a multiprocessor machine SGI Origin2000 and on an Intel Xeon workstation show that the new self-tuning spin-lock helps the applications with different characteristics nearly achieve the best performance in a wide range of contention levels.

online algorithms

reactive spinlocks



Phuong Ha

Chalmers, Data- och informationsteknik, Datavetenskap

Marina Papatriantafilou

Chalmers, Data- och informationsteknik, Datavetenskap

Philippas Tsigas

Chalmers, Data- och informationsteknik, Datavetenskap


Data- och informationsvetenskap

Technical report - Department of Computer Science and Engineering, Chalmers University of Technology and Göteborg University: 2005:16

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