linux-kernel - Re: [PATCH v3 2/4] perf tools: Prompt proper error message for wrong terms of hw/sw events

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Message-ID: <20150928193937.GB18363@krava.redhat.com>
Date:	Mon, 28 Sep 2015 21:39:37 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	a.p.zijlstra@...llo.nl, mingo@...hat.com, acme@...nel.org,
	jolsa@...nel.org, kan.liang@...el.com, adrian.hunter@...el.com,
	wangnan0@...wei.com, pi3orama@....com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/4] perf tools: Prompt proper error message for wrong
 terms of hw/sw events

On Mon, Sep 28, 2015 at 03:52:14AM +0000, He Kuang wrote:
> Prompt proper error message and show valid terms when wrong config
> terms is specificed for hw/sw type perf events. This patch makes the
> original error prompt function formats_error_string() more generic,
> which only outputs the static config terms for hw/sw perf events, and
> prepends pmu formats for pmu events.
> 
> Before this patch:
> 
>   $ perf record -e 'cpu-clock/freqx=200/' -a sleep 1
>   invalid or unsupported event: 'cpu-clock/freqx=200/'
>   Run 'perf list' for a list of valid events
> 
>    usage: perf record [<options>] [<command>]
>       or: perf record [<options>] -- <command> [<options>]
> 
>       -e, --event <event>   event selector. use 'perf list' to list available events
> 
> After this patch:
> 
>   $ perf record -e 'cpu-clock/freqx=200/' -a sleep 1
>   event syntax error: 'cpu-clock/freqx=200/'
>                                  \___ unknown term
> 
>   valid terms: config,config1,config2,name,period,freq,branch_type,time,call-graph,stack-size
> 
>   Run 'perf list' for a list of valid events
> 
>    usage: perf record [<options>] [<command>]
>       or: perf record [<options>] -- <command> [<options>]
> 
>       -e, --event <event>   event selector. use 'perf list' to list available events
> 
> Signed-off-by: He Kuang <hekuang@...wei.com>

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka
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