linux-kernel - Re: [PATCH -tip v4 0/7] perf: Introduce branch sub commands

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Date:	Fri, 10 Jun 2011 13:24:29 +0900
From:	Akihiro Nagai <akihiro.nagai.hw@...achi.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	pp-manager@....hitachi.co.jp
Subject: Re: [PATCH -tip v4 0/7] perf: Introduce branch sub commands

(2011/05/31 0:26), David Ahern wrote:
> On 05/30/2011 07:31 AM, Akihiro Nagai wrote:
>>> The sample address can be converted to symbols and the output can be
>>> added to perf-script rather easily. Attached is an example. I was going
>>> to submit it back in April and got distracted. I'll rebase, move the
>>> addr->sym conversion to a function and submit later today.
>> OK.
>> I agreed with implementing it on perf script.
>> I'd like to try it.
>
> Updated patch. It applies on top of:
>    http://lkml.org/lkml/2011/5/27/385
It looks good.

>
> Hopefully for BTS you only have to change the sample_addr_correlates_sym
> function.
Yes.
I'd like to enhance perf-script like this:

# perf script -f ip,addr,comm,sym,dso

output format is:
<comm> <ip> <sym_ip> <dso_ip> <addr> <sym_addr> <dso_addr>

actual output sample is:
ls 0xffffffff81460b92 common_interrupt /lib/modules/3.0/build/vmlinux 0x0000003e9b000b20 _start /lib64/ld-2.13.so
ls 0x0000003e9b000b23 _start /lib64/ld-2.13.so 0x0000003e9b004540 _dl_start /lib64/ld-2.13.so
...

By specifying 'ip' and 'addr' together, perf-script resolves
symbol and dso's path about both of 'ip' and 'addr'.

>
> I still need to look into out why some of the addresses for page-faults
> are not resolving to symbols.
I'd like to improve it referring perf branch's source codes.

Thank you.

>
> David
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