lisa.wlgen.fio: Introduce Fio as Workload

Created by: cloehle

Fio is a highly-configurable I/O tester used by the block layer for testing and as a general benchmark tool for storage. Even for scheduler investigations Fio is interesting as in_iowait-setting tasks are treated differently. To be able to create tests for them we introduce a simplistic lisa frontend.

Fio Workloads can now be created like:

ftest = Fio(target, filename="/dev/nvme0n1", name="test", rw="randread", runtime=50, bs='4k') and then ran like any other:

with ftest: result = fiotestmmc.run() print(result.read_iops)