On Wed, 1 Aug 2007, Andi Kleen wrote:
> Christoph Lameter <[email protected]> writes:
>
> > Export cycles_to_ns (after renaming the cycles_2_ns to cycles_to_ns to be
> > conforming to other arches).
>
> This function is broken in some cases (e.g Opteron with powernow or
> AMD dual core or older Intel systems) and going away. The TSCs tick
> with different frequencies on different CPU there. In general i would
> recommend to only report cycles.
But then the numbers are not comparable across systems.
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