patacongo commented on issue #37: examples: hello: Show CPU index when running in SMP mode URL: https://github.com/apache/incubator-nuttx-apps/pull/37#issuecomment-580563032 "But is it reasonable to follow Linux practice if POSIX doesn't define something but very useful(don't like up_cup_index)?" I agree, but this interface is not useful and will cause bugs if anyone were to actually do anything with it. Just using it in a printf() is harmless (but might print the wrong value). Making any decisions based on the CPU would would not work because the value is volatile and cannot be used in that way. So such an interface would be a support and maintainence problem because it is inherently buggy and returns incorrect values. Best not to support it; best not to introduce a non-standard interface that provides no value.
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