Re: [PATCH] perf/x86: Reject non sampling events with precise_ip

[Vince Weaver]

On Tue, 3 Jan 2017, Jiri Olsa wrote:
> On Tue, Jan 03, 2017 at 10:40:59AM +0100, Peter Zijlstra wrote:
> > 
> > I think we should reject non sampling pebs events, as you say they make
> > no sense what so ever.
> 
> ook, attached
> 

you can use the PEBS events to gather aggregate stats though and they 
seem roughly right.  Are they truly meaningless?

I had misremembered that they might not have the determinism problems of 
regular events (turns out that's wrong).  They oddly seem to be worse in 
some limited tests I did.

So I guess nothing will be lost if they're disabled.

Vince