benchbuild.likwid module

Likwid helper functions.

Extract information from likwid’s CSV output.

benchbuild.likwid.fetch_cols(fstream, split_char=', ')

Fetch columns from likwid’s output stream.

Parameters:

• fstream – The filestream with likwid’s output.
• split_car (str) – The character we split on, default ‘,’

Returns (list(str)):

A list containing the elements of fstream, after splitting at split_char.

benchbuild.likwid.get_measurements(region, core_info, data, extra_offset=0)

Get the complete measurement info from likwid’s region info.

Parameters:

• region – The region we took a measurement in.
• core_info – The core information.
• data – The raw data.
• extra_offset (int) – default = 0

Returns (list((region, metric, core, value))):

A list of measurement tuples, a tuple contains the information about the region, the metric, the core and the actual value.

benchbuild.likwid.perfcounters(infile)

Get a complete list of all measurements.

Parameters:infile – The filestream containing all likwid output. Returns:A list of all measurements extracted from likwid’s file stream.

benchbuild.likwid.read_struct(fstream)

Read a likwid struct from the text stream.

Parameters:fstream – Likwid’s filestream.

Returns (dict(str: str)):

A dict containing all likwid’s struct info as key/value pairs.

benchbuild.likwid.read_structs(fstream)

Read all structs from likwid’s file stream.

Parameters:fstream – Likwid’s output file stream. Returns:A generator that can be used to iterate over all structs in the fstream.

benchbuild.likwid.read_table(fstream)

Read a likwid table info from the text stream.

Parameters:fstream – Likwid’s filestream.

Returns (dict(str: str)):

A dict containing likwid’s table info as key/value pairs.

benchbuild.likwid.read_tables(fstream)

Read all tables from likwid’s file stream.

Parameters:fstream – Likwid’s output file stream. Returns:A generator that can be used to iterate over all tables in the fstream.