Concurrency bugs in open source software: a case study

Journal of Internet Services and Applications

Table 5 Wilcoxon test for concurrency bugs fixing time comparison

H ₀ \ H _A	Hypothesis	Deadlock	Data race	Order violation	Atomicity violation	Livelock	Starvation	Suspension
	test result
Deadlock	P-value	–	0.003596	0.01648	0.1041	0.4447	0.5632	0.01825
	A-statistic	–	0.824977	0.2347107	0.08517906	0.009917355	0.06688705	0.224775
Data race	P-value	0.003596	–	0.9828	0.7515	0.7185	0.1312	0.8194
	A-statistic	0.175023	–	0.142112	0.05393939	0.00697888	0.04932966	0.1394123
Order violation	P-value	0.01648	0.9828	–	0.6191	0.5816	0.1164	0.7458
	A-statistic	0.2451791	0.857888	–	0.08958678	0.01083563	0.0707989	0.235427
Atomicity violation	P-value	0.1041	0.7515	0.6191	–	0.9474	0.3627	0.9183
	A-statistic	0.2624793	0.9460606	0.268944	–	0.01153352	0.07555556	0.2584206
Livelock	P-value	0.4447	0.7185	0.5816	0.9474	–	0.5714	0.8744
	A-statistic	0.2716253	0.9930211	0.2826814	0.1023691	–	0.0784573	0.2709458
Starvation	P-value	0.5632	0.1312	0.1164	0.3627	0.5714	–	0.2291
	A-statistic	0.2631405	0.9506703	0.2703949	0.09814509	0.01149679	–	0.259596
Suspension	P-value	0.01825	0.8194	0.7458	0.9183	0.8744	0.2291	–
	A-statistic	0.2462994	0.8605877	0.2444628	0.08923783	0.01059688	0.07043159	–