Program performance is always a concern, even in this era of high-performance hardware. This article, the first in a two-part series, guides you around the many pitfalls associated with benchmarking Java code. Part 2 covers the statistics of benchmarking and offers a framework for performing Java benchmarking. Because almost all new languages are virtual machine-based, the general principles the article describes have broad significance for the programming community at large.
I recently diagnosed the root cause of a concurrency bug, CR6822370,
and thought it sufficiently interesting to share the details. (CR 6822370 actually represents a
cluster of bugs that are now thought to be related by a common underlying issue).
Briefly, we have a lost wakeup bug in the native C++ Parker::park() platform-specific
infrastructure code that implements java.util.concurrent.LockSupport.park().
The lost wakeup arises from a race that itself arises because of architectural
reordering that in turn occurs because of missing memory barrier instructions.
The lost wakeup may manifest as various 'hangs' or instances of progress failure.
J. Auerbach, D. Bacon, P. Cheng, и R. Rabbah. OOPSLA '10: Proceedings of the ACM international conference on Object oriented programming systems languages and applications, стр. 89--108. New York, NY, USA, ACM, (2010)
A. Azevedo, A. Kejariwal, A. Veidenbaum, и A. Nicolau. EMSOFT '05: Proceedings of the 5th ACM international conference on Embedded software, стр. 52--61. New York, NY, USA, ACM, (2005)
M. Bebenita, A. Gal, и M. Franz. PPPJ '07: Proceedings of the 5th international symposium on Principles and practice of programming in Java, стр. 145--154. New York, NY, USA, ACM, (сентября 2007)
N. Beckman, D. Kim, и J. Aldrich. ECOOP 2011 – Object-Oriented Programming, том 6813 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2011)
P. Bertels, и D. Stroobandt. International Conference on Complex, Intelligent and Software Intensive Systems, стр. 627-631. Los Alamitos, CA, USA, IEEE Computer Society, (2008)
M. Braux, и J. Noyé. Proceedings of the 2000 ACM SIGPLAN Workshop on Partial Evaluation and Semantics-based Program Manipulation, стр. 2--11. ACM, (1999)
H. Burchell, O. Larose, и S. Marr. Proceedings of the 21st ACM SIGPLAN International Conference on Managed Programming Languages and Runtimes, ACM, (сентября 2024)