Lbench is a simple Linux multithread benchmark tool.
Various aspects of CPU and OS performance are measured for 1-9 parallel threads.
Measure how well performance scales with multiple threads using multiple CPU processor cores.

Lbench can make the following measurements for 1 to 9 parallel threads:

Lbench has two other functions not related to benchmarking:

Conclusions: based on Intel Core i5 2.7 GHz with 4 processor cores and Linux kernel 4.2:

The user guide is available from the [help] button and goes into more detail about each benchmark and its configurable parameters.

Example Output 
measurements for one thread                                 four parallel threads.