linux-kernel - Re: [PATCH v2 2/6] perf report: Caculate and return the branch counting in callchain

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Message-ID: <20161020164854.GB1075@tassilo.jf.intel.com>
Date:   Thu, 20 Oct 2016 09:48:54 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Nilay Vaish <nilayvaish@...il.com>
Cc:     Jin Yao <yao.jin@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Linux Kernel list <Linux-kernel@...r.kernel.org>,
        kan.liang@...el.com
Subject: Re: [PATCH v2 2/6] perf report: Caculate and return the branch
 counting in callchain

On Thu, Oct 20, 2016 at 11:41:11AM -0500, Nilay Vaish wrote:
> On 19 October 2016 at 17:01, Jin Yao <yao.jin@...ux.intel.com> wrote:
> > diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
> > index 40ecf25..4f6bf6c 100644
> > --- a/tools/perf/util/callchain.h
> > +++ b/tools/perf/util/callchain.h
> > @@ -115,6 +115,10 @@ struct callchain_list {
> >                 bool            unfolded;
> >                 bool            has_children;
> >         };
> > +       u64                     branch_count;
> > +       u64                     predicted_count;
> > +       u64                     abort_count;
> 
> Can you explain what abort count is?  It seems you are referring to
> miss-speculated branches.  If that is the case, I would prefer that we
> replace abort by miss_speculated or miss_predicted.

abort refers to TSX aborts. It has nothing to do with branch
mispredictions.

-Andi