On Tue, 14 Jan 2014, Peter Zijlstra wrote: > On Mon, Jan 13, 2014 at 11:55:17PM -0500, Vince Weaver wrote:
> > I don't see an existing pmu capabilities struct... or do you mean > > coming up with one? > > Yeah, adding one. So would it be a struct, or just an integer with flags? > > Would it only hold an "overflow_interrupt_available" flag, or are > > there other generic capabilities it would be handy to know about? > > Possible (other) flags could be: > > PMU_HAS_INT -- would allow sampling events > PMU_HAS_PRECISE -- would allow any ::precise value > PMU_HAS_FILTER -- would allow all os/user/etc. flags should we export these to userspace somehow? It would be handy to be able to tell you're getting EOPNOTSUP because PMU_HAS_INT is not set for your pmu, rather than trying to guess why things are failing. Vince -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
