Re: [tip:perf/core] perf tools: Improve call graph documents and help messages
From: Ingo Molnar
Date: Fri Oct 23 2015 - 05:04:12 EST
* tip-bot for Namhyung Kim <tipbot@xxxxxxxxx> wrote:
> Commit-ID: 76a26549eb367f683fbb394b7246bef5dc665f8c
> Gitweb: http://git.kernel.org/tip/76a26549eb367f683fbb394b7246bef5dc665f8c
> Author: Namhyung Kim <namhyung@xxxxxxxxxx>
> AuthorDate: Thu, 22 Oct 2015 23:28:32 +0900
> Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> CommitDate: Thu, 22 Oct 2015 16:23:19 -0300
>
> perf tools: Improve call graph documents and help messages
>
> The --call-graph option is complex so we should provide better guide for
> users. Also change help message to be consistent with config option
> names. Now perf top will show help like below:
>
> $ perf top --call-graph
> Error: option `call-graph' requires a value
>
> Usage: perf top [<options>]
>
> --call-graph <record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]>
> setup and enables call-graph (stack chain/backtrace):
>
> record_mode: call graph recording mode (fp|dwarf|lbr)
> record_size: if record_mode is 'dwarf', max size of stack recording (<bytes>)
> default: 8192 (bytes)
> print_type: call graph printing style (graph|flat|fractal|none)
> threshold: minimum call graph inclusion threshold (<percent>)
> print_limit: maximum number of call graph entry (<number>)
> order: call graph order (caller|callee)
> sort_key: call graph sort key (function|address)
> branch: include last branch info to call graph (branch)
Btw., how is the last line to be interpreted? Is the 'branch' value 0/1? If yes
then the text should probably say so? Or does the string 'branch' have to be used?
Thanks,
Ingo
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