Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heterogeneity-Aware Asynchronous Decentralized Training   Distributed deep learning training usually adopts All-Reduce as the
synchronization mechanism for data parallel algorithms due to its high
performance in homogeneous environment. However, its performance is bounded by
the slowest worker among all workers, and is significantly slower in
heterogeneous situations. AD-PSGD, a newly proposed synchronization method
which provides numerically fast convergence and heterogeneity tolerance,
suffers from deadlock issues and high synchronization overhead. Is it possible
to get the best of both worlds - designing a distributed training method that
has both high performance as All-Reduce in homogeneous environment and good
heterogeneity tolerance as AD-PSGD? In this paper, we propose Ripples, a
high-performance heterogeneity-aware asynchronous decentralized training
approach. We achieve the above goal with intensive synchronization
optimization, emphasizing the interplay between algorithm and system
implementation. To reduce synchronization cost, we propose a novel
communication primitive Partial All-Reduce that allows a large group of workers
to synchronize quickly. To reduce synchronization conflict, we propose static
group scheduling in homogeneous environment and simple techniques (Group Buffer
and Group Division) to avoid conflicts with slightly reduced randomness. Our
experiments show that in homogeneous environment, Ripples is 1.1 times faster
than the state-of-the-art implementation of All-Reduce, 5.1 times faster than
Parameter Server and 4.3 times faster than AD-PSGD. In a heterogeneous setting,
Ripples shows 2 times speedup over All-Reduce, and still obtains 3 times
speedup over the Parameter Server baseline.

37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th