Re: [PATCH 2/2] perf tools: Improve call graph documents and help messages
From: Frederic Weisbecker
Date: Thu Oct 22 2015 - 12:28:26 EST
On Thu, Oct 22, 2015 at 11:28:32PM +0900, Namhyung Kim wrote:
> 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)
>
> Default: fp,graph,0.5,caller,function
ACK, thanks a lot!
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