University of Michigan researchers developed a new way around this problem with a controller that can anticipate and prevent situations that might cause deadlock.
Their controller is called Gadara. It’s a plug-in that operates using feedback techniques similar to those that give us cruise control in cars and thermostats in heating systems.
“This is a totally different approach to what people had done before for deadlock. Previously, engineers would try to identify potential deadlocks through testing or program analysis and then go back and rewrite the program. The bug fixes were manual, and not automatic. Gadara automates the process,” said Stéphane Lafortune, a professor in the Department of Electrical Engineering and Computer Science and a Gadara developer.
Yin Wang, a doctoral student who works with Lafortune in the same department, will present a paper on Gadara Dec. 9 at the USENIX Symposium on Operating Systems Design and Implementation in San Diego.
“Every time you find a problem today you need the original programmer to solve it. The goal of Gadara is to allow anyone with our tool to solve the problem,” Wang said.
Deadlock is becoming a more pressing concern as multicore chips grow in complexity and software performs an increasing number of tasks simultaneously. The bug shows up often in parallel programs that use shared data.
Gadara works by analyzing a program to find potential deadlocks, and then inserting control logic into the program. The control logic ensures that the program cannot deadlock.
Gadara uses a unique combination of discrete control theory and compiler technology, said Lafortune, whose primary work focuses on discrete control theory. The control theory provides the logic that allows Gadara to use feedback to prevent software deadlocks.
The compiler technology, which was developed by Scott Mahlke, a professor in the Department of Electrical Engineering and Computer Science, enables Gadara to operate on real-world applications. Compilers translate programs written in high-level programming languages in executable code.
The paper is titled “Gadara: Dynamic Deadlock Avoidance for Multithreaded Programs.” Other co-developers of Gadara are Terence Kelly, who received his doctoral degree from U-M and is currently at Hewlett-Packard Laboratories, and Manjunath Kudlur, a recent doctoral graduate from U-M who is now working at NVidia.
Current research on Gadara is funded by the National Science Foundation and by an HP Labs Open Innovation award.For more information on Lafortune, visit: http://www.eecs.umich.edu/~stephane/
Research on light-matter interaction could improve electronic and optoelectronic devices
11.10.2018 | Rensselaer Polytechnic Institute
Unique Deep Learning Infrastructure - DFKI receives first NVIDIA DGX-2 supercomputer in Europe
11.10.2018 | Deutsches Forschungszentrum für Künstliche Intelligenz GmbH, DFKI
Scientists at the Max Planck Institute for Polymer Research (MPI-P) in Mainz (Germany) together with scientists from Dresden, Leipzig, Sofia (Bulgaria) and Madrid (Spain) have now developed and characterized a novel, metal-organic material which displays electrical properties mimicking those of highly crystalline silicon. The material which can easily be fabricated at room temperature could serve as a replacement for expensive conventional inorganic materials used in optoelectronics.
Silicon, a so called semiconductor, is currently widely employed for the development of components such as solar cells, LEDs or computer chips. High purity...
Augsburg chemists present a new technology for compressing, storing and transporting highly volatile gases in porous frameworks/New prospects for gas-powered vehicles
Storage of highly volatile gases has always been a major technological challenge, not least for use in the automotive sector, for, for example, methane or...
When we put water in a freezer, water molecules crystallize and form ice. This change from one phase of matter to another is called a phase transition. While this transition, and countless others that occur in nature, typically takes place at the same fixed conditions, such as the freezing point, one can ask how it can be influenced in a controlled way.
We are all familiar with such control of the freezing transition, as it is an essential ingredient in the art of making a sorbet or a slushy. To make a cold...
Thin organic layers provide machines and equipment with new functions. They enable, for example, tiny energy recuperators. In future, these will be installed...
Das Zusammenspiel aus Struktur und Dynamik bestimmt die Funktion von Proteinen, den molekularen Werkzeugen der Zelle. Durch Fortschritte in der...
17.10.2018 | Event News
16.10.2018 | Event News
02.10.2018 | Event News
17.10.2018 | Trade Fair News
17.10.2018 | Life Sciences
17.10.2018 | Agricultural and Forestry Science