lkml.org 
[lkml]   [2011]   [Nov]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    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.

    --
    Gleb.


    \
     
     \ /
      Last update: 2011-11-07 17:25    [W:0.019 / U:119.464 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site