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Guided parallelized stochastic gradient descent for delay compensation

Sharma, Anuraganand (2021) Guided parallelized stochastic gradient descent for delay compensation. Applied Soft Computing, 102 . NA. ISSN 1568-4946

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Stochastic gradient descent (SGD) algorithm and its variations have been effectively used to optimize neural network models. However, with the rapid growth of big data and deep learning, SGD is no longer the most suitable choice due to its natural behavior of sequential optimization of the error function. This has led to the development of parallel SGD algorithms, such as asynchronous SGD (ASGD) and synchronous SGD (SSGD) to train deep neural networks. However, it introduces a high variance due to the delay in parameter (weight) update. We address this delay in our proposed algorithm and try to minimize its impact. We employed guided SGD (gSGD) that encourages consistent examples to steer the convergence by compensating the unpredictable deviation caused by the delay. Its convergence rate is also similar to A/SSGD, however, some additional (parallel) processing is required to compensate for the delay. The experimental results demonstrate that our proposed approach has been able to mitigate the impact of delay for the quality of classification accuracy. The guided approach with SSGD clearly outperforms sequential SGD and even achieves an accuracy close to sequential SGD for some benchmark datasets.

Item Type: Journal Article
Uncontrolled Keywords: Asynchronous/synchronous stochastic gradient descent, Classification, Deep learning, Gradient Methods, Stochastic gradient descent
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Computing, Information and Mathematical Sciences
Depositing User: Anuraganand Sharma
Date Deposited: 24 Jan 2021 21:17
Last Modified: 24 Jan 2021 21:17

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