Messages in this thread | | | Subject | Re: [PATCH 2/7] Simple Performance Counters: x86_64 support | From | Andi Kleen <> | Date | 01 Aug 2007 12:53:45 +0200 |
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Christoph Lameter <clameter@sgi.com> 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.
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