Messages in this thread | | | Subject | Re: [PATCHv2 6/9] perf: expose perf capability to other modules. | From | Peter Zijlstra <> | Date | Mon, 07 Nov 2011 17:01:11 +0100 |
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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 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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