* Namhyung Kim <namhy...@kernel.org> wrote:
> Hi Ingo,
>
> On Fri, Oct 23, 2015 at 6:03 PM, Ingo Molnar <mi...@kernel.org> wrote:
> >
> > * tip-bot for Namhyung Kim <tip...@zytor.com> wrote:
> >
> >> Commit-ID: 76a26549eb367f683fbb394b7246bef5dc665f8c
> >> Gitweb:
> >> http://git.kernel.org/tip/76a26549eb367f683fbb394b7246bef5dc665f8c
> >> Author: Namhyung Kim <namhy...@kernel.org>
> >> AuthorDate: Thu, 22 Oct 2015 23:28:32 +0900
> >> Committer: Arnaldo Carvalho de Melo <a...@redhat.com>
> >> 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.
Yeah, so that wasn't very obvious, as there's a mixture of literal symbols with
parameter names. For example:
--call-graph
<record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]>
setup and enables call-graph (stack chain/backtrace):
so 'record_size' is obviously never to be written in a literal fashion - but
'branch' is?
But I cannot think of a better solution, other than replacing:
default: 8192 (bytes)
with :
default: 8192 bytes
because in all other cases parantheses denote a specification of valid
parameter
values.
Thanks,
Ingo
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