Re: [tip:perf/core] perf tools: Improve call graph documents and help messages

From: Namhyung Kim
Date: Sat Oct 24 2015 - 11:52:51 EST

Hi Ingo,

On Fri, Oct 23, 2015 at 6:03 PM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> * tip-bot for Namhyung Kim <tipbot@xxxxxxxxx> wrote:
>> Commit-ID: 76a26549eb367f683fbb394b7246bef5dc665f8c
>> Gitweb:
>> 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?

Yep, the string 'branch' should be used.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at