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

From Andi Kleen <ak@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2 2/6] perf report: Caculate and return the branch counting in callchain
Date 2016-10-20 20:30 +0200
Message-ID <suqgi-2Md-25@gated-at.bofh.it> (permalink)
References <su1UC-3KZ-23@gated-at.bofh.it> <su1UD-3KZ-47@gated-at.bofh.it> <suoHv-1G4-5@gated-at.bofh.it> <suoHw-1G4-15@gated-at.bofh.it> <sup0R-21Y-17@gated-at.bofh.it>
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> OK, I am more confused now.  Are you predicting some quantity related
> to transactions?  Why would you divide abort count by branch count?
> Further, I just looked at patch 6/6.  It has the following text:
> 
> + Also show with some branch flags that can be:
> + - Predicted: display the average percentage of predicated branches.
> +     (predicated number / total number)
> + - Abort: display the average percentage of abort branches.
> + (abort number /total number)
> + - Cycles: cycles in basic block.
> 
> 
> I think there is inconsistency between what you are suggesting and
> what the patch has.

An abort is an unique branch. But yes there is no total number,
so the formula will always be 100%. So yes would probably be 
better to just display a count for abort.

-Andi

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[PATCH v2 2/6] perf report: Caculate and return the branch counting in callchain Jin Yao <yao.jin@linux.intel.com> - 2016-10-19 18:30 +0200
  Re: [PATCH v2 2/6] perf report: Caculate and return the branch  counting in callchain Nilay Vaish <nilayvaish@gmail.com> - 2016-10-20 18:50 +0200
    Re: [PATCH v2 2/6] perf report: Caculate and return the branch  counting in callchain Andi Kleen <ak@linux.intel.com> - 2016-10-20 18:50 +0200
      Re: [PATCH v2 2/6] perf report: Caculate and return the branch  counting in callchain Nilay Vaish <nilayvaish@gmail.com> - 2016-10-20 19:10 +0200
        Re: [PATCH v2 2/6] perf report: Caculate and return the branch  counting in callchain Andi Kleen <ak@linux.intel.com> - 2016-10-20 20:30 +0200
          Re: [PATCH v2 2/6] perf report: Caculate and return the branch  counting in callchain "Jin, Yao" <yao.jin@linux.intel.com> - 2016-10-21 02:30 +0200
            Re: [PATCH v2 2/6] perf report: Caculate and return the branch  counting in callchain Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-10-25 20:20 +0200

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