Documentation of Relative Expected HW Energy Demand (REHWED) Calculation

Introduction

1. Feature Extraction

Use the following command to extract Valgrind processor events of your anchor and test bitstreams:

• Anchor:

  Valgrind --tool=callgrind --simulate-cache=yes --dump-instr=yes --collect-jumps=yes --branch-sim=yes --I1=32768,8,64 --D1=32768,8,64 --LL=12582912,64,24 [decoder command] >> [bitstreamAnchor].log

• Test: Valgrind --tool=callgrind --simulate-cache=yes --dump-instr=yes --collect-jumps=yes --branch-sim=yes --I1=32768,8,64 --D1=32768,8,64 --LL=12582912,64,24 [decoder command] >> [bitstreamTest].log

Export your SW profiling with Valgrind in two separate folders in the directory Import.

2. REHWED Evaluation

Open MainEvaluateREHWED.m in Matlab, adapt the names of the two folders in l.19 and l.20 accordingly. Run script!

References

[1] M. Kränzler, C. Herglotz, and A. Kaup, "Predicting the Energy Demand of a Hardware Video Decoder with Unknown Design Using Software Profiling", https://doi.org/10.48550/arXiv.2402.09926, Feb. 2024.

License

BSD 3-Clause. For details, see LICENSE.