> > > _SC_NPROCESSORS_MAX is the maximum (aka max_ncpus in the kernel). > > Ok... but isn't this just the theoretical limit supported by the kernel > ?
It's a per-platform maximum -- e.g. 256 for sun4v, 64 for E10K's, 32 for other sun4u hardware, and so forth. This maximum may change in a patch. > Or is this value calculated from the physically available CPUs ? Given that one may DR in or our cards with CPUs on them at any time, the notion of "available CPUs" has no connection with the notion of "maximum CPUs". -- meem
