linux-kernel - Re: [PATCH 3/3] perf, tool: Add new event group management

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Date:	Tue, 20 Mar 2012 19:18:45 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>, mingo@...e.hu, paulus@...ba.org,
	cjashfor@...ux.vnet.ibm.com, fweisbec@...il.com,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 3/3] perf, tool: Add new event group management

Em Tue, Mar 20, 2012 at 09:46:25PM +0100, Ingo Molnar escreveu:
> 
> * Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> 
> > Now the disadvantage is that {} needs quotes on bash, [...]
> 
> Not on my version of Bash:
> 
>  earth5:~> perf stat {}
>  {}: No such file or directory
>  Terminated
>  earth5:~> perf stat true {}
> 
>   Performance counter stats for 'true {}':
> 
> it's passed in literally, AFAICS.

I like it, but...

[acme@...icio ~]$ perf stat -e {cycles,cache-misses} ls
cache-misses: No such file or directory
Terminated
[acme@...icio ~]$ perf stat -e \{cycles,cache-misses\} ls
invalid or unsupported event: '{cycles,cache-misses}'
Run 'perf list' for a list of valid events

but:

[acme@...icio ~]$ perf stat -e [cycles,instructions] ls
perf stat -e [cycles,instructions] ls
invalid or unsupported event: '[cycles,instructions]'
Run 'perf list' for a list of valid events

[acme@...icio ~]$ perf stat -e [cycles,cache-misses]:u ls
invalid or unsupported event: '[cycles,cache-misses]:u'
Run 'perf list' for a list of valid events

And:

[acme@...icio ~]$ perf stat -e (cycles,cache-misses) ls
bash: syntax error near unexpected token `('
[acme@...icio ~]$

- Arnaldo
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