MCEmu: A Framework for Software Development and Performance Analysis of Multicore Systems
ACM Transactions on Design Automation of Electronic Systems (TODAES)
A real-time, energy-efficient system software suite for heterogeneous multicore platforms
Proceedings of the eighth IEEE/ACM/IFIP international conference on Hardware/software codesign and system synthesis
Performance and power profiling for emulated Android systems
ACM Transactions on Design Automation of Electronic Systems (TODAES)
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Functional virtual platforms have been popularly used to support system development without needing the actual hardware. While the emulation process is fast enough to model the behaviors of complex systems, performance assessment cannot be done accurately due to the lack of timing models for the simulated systems. To tackle the problem, we proposed a virtual timing device (VTD) for a functional virtual platform to advance simulated clock time based on the hardware/software events observed during the emulation process. As a case study, we implemented the VTD in QEMU, an open-source virtual platform, with a variety of timing algorithms offering trade-offs between the accuracy and speed of timing estimation. With a fast, but less accurate timing algorithm, quick performance analysis can be done on QEMU at approximately 67 million instruction per second and reported execution time for the MiBench with an average of 15.7% error. Highly accurate performance profiles can be obtained by elaborating the timing model, e.g. with the addition of cache simulation, at the cost of simulation speed.