On Fri, Oct 19, 2012 at 05:47:11PM +0200, Stephane Eranian wrote:
> On Fri, Oct 19, 2012 at 5:23 PM, Jiri Olsa <[email protected]> wrote:
> > On Fri, Oct 19, 2012 at 05:17:57PM +0200, Stephane Eranian wrote:
> >> On Fri, Oct 19, 2012 at 5:13 PM, Peter Zijlstra <[email protected]>
> >> wrote:
> >> > On Fri, 2012-10-19 at 16:52 +0200, Stephane Eranian wrote:
> >> >> -modifier_event [ukhpGH]{1,8}
> >> >> +modifier_event [ukhpGHx]{1,8}
> >> >
> >> > wouldn't the max modifier sting length grow by adding another possible
> >> > modifier?
> >>
> >> That's what I thought too, but then I don't understand why it was at
> >> eight before and not
> >> seven: One instance of each letter, + a second for pp (precise=2). Or
> >> am I missing
> >> something here?
> >
> > hm, I think I assumed for some reason that 'ppp' is valid as well
> >
> If that's the case, then yes, I need to bump that number to 9.
found my source ;)
include/linux/perf_event.h:
...
/*
* precise_ip:
*
* 0 - SAMPLE_IP can have arbitrary skid
* 1 - SAMPLE_IP must have constant skid
* 2 - SAMPLE_IP requested to have 0 skid
* 3 - SAMPLE_IP must have 0 skid
*
* See also PERF_RECORD_MISC_EXACT_IP
*/
precise_ip : 2, /* skid constraint */
...
jirka
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