* markus.t.metz...@intel.com <markus.t.metz...@intel.com> wrote:
> From: Markus Metzger <markus.t.metz...@intel.com>
>
> Starting with Nehalem, the BTS "from" information may in some cases be
> incorrect (AAJ122).
>
> This has been detected while adding branch tracing support to gdb, where it
> results in sporadic test fails.
>
> Disable BTS support on Nehalem, Westmere, Sandy Bridge, and Ivy Bridge.
But the failures are rare, so the BTS data is still correct
statistically, by and large, right? So why not just keep it
as-is and teach tooling to be more robust about implausible
trace entries? It has to be ready for that eventuality *anyway*.
Thanks,
Ingo
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