JetBench: An Open Source Real-time Multiprocessor Benchmark. The application is designed to be platform independent by avoiding target specific libraries and hardware counters and timers.
Another useful extension to JetBench is done by Haitao Mei under the supervision of Prof. Andy Wellings. The author has resolved many issues in the original code. I would suggest all to please have a look at:
https://sourceforge.net/projects/mpbenchmark/