Em Mon, Aug 26, 2013 at 04:15:34PM +0300, Adrian Hunter escreveu:
> On 07/08/13 16:30, Adrian Hunter wrote:
> > When an event is disabled the "tracking" events
> > selected by the 'mmap', 'comm' and 'task' bits of
> > struct perf_event_attr, are also disabled. However,
> > the information those events provide is necessary to
> > resolve symbols for when the main event is re-enabled.
> >
> > The "tracking" events can be kept enabled by putting
> > them on another event, but that requires an event
> > that otherwise does nothing. A new software event
> > PERF_COUNT_SW_DUMMY is added for that purpose.
> >
> > Signed-off-by: Adrian Hunter <adrian.hun...@intel.com>
>
> Any comments?
Ok with me, Peter?
- Arnaldo
> > ---
> > include/uapi/linux/perf_event.h | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/include/uapi/linux/perf_event.h
> > b/include/uapi/linux/perf_event.h
> > index 62c25a2..9e28422 100644
> > --- a/include/uapi/linux/perf_event.h
> > +++ b/include/uapi/linux/perf_event.h
> > @@ -109,6 +109,7 @@ enum perf_sw_ids {
> > PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
> > PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
> > PERF_COUNT_SW_EMULATION_FAULTS = 8,
> > + PERF_COUNT_SW_DUMMY = 9,
> >
> > PERF_COUNT_SW_MAX, /* non-ABI */
> > };
> >
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