Architectural Probes

We use the archinfo_xxx probes to discover the following architectural information:

• 'n': number of cpus
• 'c': number of cache levels
• 'C' #: size in KB of cache level #
• 'v': verbose (prints strings as well as ints)
• 'm': clock rate in Mhz
• 'a': ATLAS architecture classification
• 'b': support for 64 / 32 bits
• 't': Is cpu throttling currently on (-1: no, 0: don't know, 1: yes)

If a given probe cannot find that particular item, it is returned as 0.

The frontend wrapper script archinfo.c calls these guys according to OS, and tries to get all flags filled in with union of functionality of archinfo_x86 and archinfo_$<$OS$>$.