CASES '10 Proceedings of the 2010 international conference on Compilers, architectures and synthesis for embedded systems
A stream-computing extension to OpenMP
Proceedings of the 6th International Conference on High Performance and Embedded Architectures and Compilers
DDM-VMc: the data-driven multithreading virtual machine for the cell processor
Proceedings of the 6th International Conference on High Performance and Embedded Architectures and Compilers
OpenStream: Expressiveness and data-flow compilation of OpenMP streaming programs
ACM Transactions on Architecture and Code Optimization (TACO) - Special Issue on High-Performance Embedded Architectures and Compilers
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In this paper we present Thread Flux (TFlux), a complete system that supports the Data-Driven Multithreading (DDM) model of execution. TFlux virtualizes any details of the underlying system therefore offering the same programming model independently of the architecture. To achieve this goal, TFlux has a runtime support that is built on top of a commodity Operating System. Scheduling of Threads is performed by the Thread Synchronization Unit (TSU), which can be implemented either as a hardware or a software module. In addition, TFlux includes a preprocessor that, along with a set of simple compiler directives, allows the user to easily develop DDM programs. The preprocessor then automatically produces the TFlux code, which can be compiled using any commodity C compiler, therefore automatically producing code to any ISA. TFlux has been validated on three platforms. A Simics-based multicore system with a TSU hardware module (TFluxHard), a commodity 8-core Intel Core2 QuadCore-based system with a software TSU module (TFluxSoft), and a Cell/BE system with a software TSU module (TFluxCell). The experimental results show that the performance achieved is close to linear speedup, on average 21x for the 27 nodes TFluxHard, and 4.4x on a 6 nodes TFluxSoft and TFluxCell. Most importantly, the observed speedup is stable across the different platforms thus allowing the benefits of DDM to be exploited on different commodity systems.