> There are better ways to do that than using heuristics. We have to > deal with 3 variants of the reference counter: > > 1) Core and Atom: counts bus cycles and we know that frequency already > from the local apic calibration > > 2) Nehalem, Westmere: Same as TSC > > 3) Sandybridge and later: XCLK which is 100MHz > > No magic calibration, just use the information which we have on our > hands already.
This is a really bad idea. We basically would need to maintain a big switch with model numbers, with new cases added for every new CPU. Would be a maintenance nightmare. -Andi -- a...@linux.intel.com -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
