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    SubjectRe: [PATCHv2 6/9] perf: expose perf capability to other modules.
    On Mon, Nov 07, 2011 at 05:01:11PM +0100, Peter Zijlstra wrote:
    > On Mon, 2011-11-07 at 17:53 +0200, Gleb Natapov wrote:
    > > I removed branch-miss-retired here because for perf user it exists. Perf
    > > approximates it by other event but perf user shouldn't know that. A
    > > guest is not always runs with exactly same cpu model number as a host,
    > > so if we will not drop the bit here if guest will see cpu model other
    > > than the one that has this quirk it will not be able to use the event.
    > Right, so what model number do you expose? Anyway I don't really mind
    Depends on what management wants. You can specify -cpu Nehalem or -cpu
    Conroe or even override model manually by doing -cpu host,model=15.

    > masking the thing as long as we grow an ebx iteration,
    > > BTW why perf does not check event mask to see if architectural event is
    > > available before programming it?
    > No idea why not.. just one of those things nobody noticed/got around to
    > doing or so.


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