Flops is a nice tool for benchmarking floating point operations of a CPU.
Under Arch Linux i had some problems compiling it, because the static linking towards openmp was not working properly. I've made a fork, fixed the issue by removing the -static flag (and replaces -std=c++0x to -std=c++11) and a pull request in the hope, it will be included in the mainline soon.
The tool itself is quite nice to compare the throughput of FLOPS on a CPU. It measures it under perfect conditions so be aware that the everyday performance will be lower.
Still: Nice tool 🙂