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- W2983340778 abstract "A shared-memory counter is a well-studied and widely-used concurrent object. It supports two operations: An Inc operation that increases its value by 1 and a Read operation that returns its current value. Jayanti, Tan and Toueg [Jayanti et al., 2000] proved a linear lower bound on the worst-case step complexity of obstruction-free implementations, from read and write operations, of a large class of shared objects that includes counters. The lower bound leaves open the question of finding counter implementations with sub-linear amortized step complexity.In this paper, we address this gap. We present the first wait-free n-process counter, implemented using only read and write operations, whose amortized operation step complexity is O(log^2 n) in all executions. This is the first non-blocking read/write counter algorithm that provides sub-linear amortized step complexity in executions of arbitrary length. Since a logarithmic lower bound on the amortized step complexity of obstruction-free counter implementations exists, our upper bound is optimal up to a logarithmic factor." @default.
- W2983340778 created "2019-11-22" @default.
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- W2983340778 date "2019-10-11" @default.
- W2983340778 modified "2023-09-26" @default.
- W2983340778 title "Long-Lived Counters with Polylogarithmic Amortized Step Complexity" @default.
- W2983340778 doi "https://doi.org/10.4230/lipics.disc.2019.3" @default.
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