Bottleneck identification using likwid tools

TODO:

• Familiarize with https://github.com/RRZE-HPC/likwid/wiki/likwid-perfctr#using-the-marker-api using membench
• Experiment with timeline mode https://github.com/RRZE-HPC/likwid/wiki/likwid-perfctr#the-timeline-mode using membench
• Python interface https://github.com/RRZE-HPC/pylikwid using a Python example
• Setup computational example for the serial/parallel run