Narrowing the speedup factor gap of partitioned EDF
Narrowing the speedup factor gap of partitioned EDF
复制标题
缩小分区 EDF 的加速因子差距
DOI:
10.1016/j.ic.2021.104743
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发表时间:
2021
影响因子:
1
通讯作者:
Guo, Zhishan
中科院分区:
文献类型:
--
作者:
Liu, Xingwu;Han, Xin;Zhao, Liang;Guo, Zhishan
Schedulability is a fundamental problem in analyzing real-time systems, but it often has to be approximated because of the intrinsic computational hardness. Partitioned earliest deadline first (EDF) is one of the most popular polynomial-time and practical scheduler on multiprocessor platforms, and it was shown to have a speedup factor of at most 2.6322− 1/m. This paper further improves the factor to 2.5556− 1/m for both the constrained-deadline case and the arbitrary-deadline case, and it is very close to the known (non-tight) lower bound of 2.5− 1/m. The key ideas are that we develop a novel method to discretize and regularize sporadic task sets that are schedulable on uniprocessors, and we find that the ratio (ρ) of the approximate demand bound value to the machine capacity is upper-bounded by 1.5556 for the arbitrary-deadline case, which plays an important role in estimating the speed factor of partitioned EDF.
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影响因子:
1.3
作者:
Robert I. Davis;Abhilash Thekkilakattil;Oliver Gettings;R. Dobrin;S. Punnekkat;Jian
通讯作者:
Jian
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Zhishan Guo
通讯作者:
Zhishan Guo
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
J. Theis;G. Fohler
通讯作者:
G. Fohler
影响因子:
3.7
作者:
Kunal Agrawal;Sanjoy Baruah
通讯作者:
Sanjoy Baruah
DOI:
--
发表时间:
2010
期刊:
ACM-SIAM Symposium on Discrete Algorithms
影响因子:
--
作者:
F. Eisenbrand;T. Rothvoss
通讯作者:
T. Rothvoss