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SubjectRe: [PATCH v6 13/18] perf: add support for taken branch sampling to perf report
Em Thu, Feb 09, 2012 at 11:21:03PM +0100, Stephane Eranian escreveu:
> From: Roberto Agostino Vitillo <>
> This patch adds support for taken branch sampling, i.e, the
> PERF_SAMPLE_BRANCH_STACK feature to perf report. In other
> words, to display histograms based on taken branches rather
> than executed instructions addresses.
> The new option is called -b and it takes no argument. To
> generate meaningful output, the must have been
> obtained using perf record -b xxx ... where xxx is a branch
> filter option.
> The output shows symbols, modules, sorted by 'who branches
> where' the most often. The percentages reported in the first
> column refer to the total number of branches captured and
> not the usual number of samples.
> Here is a quick example.
> Here branchy is simple test program which looks as follows:

Thanks for addressing the comments, looks good now,

Acked-by: Arnaldo Carvalho de Melo <>

- Arnaldo

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