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    SubjectRe: [PATCH 00/12] perf_events: add support for sampling taken branches (v2)
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    On Tue, Dec 6, 2011 at 11:20 AM, Peter Zijlstra <peterz@infradead.org> wrote:
    > On Tue, 2011-12-06 at 11:14 -0800, Stephane Eranian wrote:
    >
    >> >> > Other than the few comments given it all looks good. My main worry is
    >> >> > the Intel only aspect, I'd really love for there to be another platform
    >> >> > that could implement at least part of this.
    >
    >> There is a hardware branch buffer on all Itanium processors.
    >> You can find the description for the McKinley implementation
    >>  (Itanium2) branch buffer in section 10.3.9 from:
    >> http://download.intel.com/design/Itanium2/manuals/25111003.pdf
    >
    >
    > Yeah, I knew Itanic has it, but one its sinking (and doesn't have perf
    > support), and two its still Intel ;-)
    >
    It's just an example of a different implementation of a branch buffer.
    That's why I mentioned it. The question is: could the branch_stack
    abstraction map to it. I think it could.

    >
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