linux-kernel - Re: Re: [RFC PATCH v2 09/15] perf probe: Support $params without debuginfo

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Message-ID: <55631E3F.6000607@hitachi.com>
Date:	Mon, 25 May 2015 22:06:07 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	He Kuang <hekuang@...wei.com>, wangnan0@...wei.com,
	paulus@...ba.org, a.p.zijlstra@...llo.nl, mingo@...hat.com,
	namhyung@...nel.org, jolsa@...nel.org, ast@...mgrid.com,
	dsahern@...il.com, brendan.d.gregg@...il.com, daniel@...earbox.net,
	lizefan@...wei.com, linux-kernel@...r.kernel.org
Subject: Re: Re: [RFC PATCH v2 09/15] perf probe: Support $params without
 debuginfo

On 2015/05/25 21:46, Arnaldo Carvalho de Melo wrote:
> Em Mon, May 25, 2015 at 09:22:50PM +0900, Masami Hiramatsu escreveu:
>> Actually, I'm working on the perf-probe cache enhancement (and it will be perf-cache)
>> which allows you to cache the result of debuginfo analysis under buildid-cache.
>> So, if the build-id is same on remote machines, you can transfer the cache to the
>> remote machine and reuse it.
> 
>> This means you don't need debuginfo in the remote machine unless
>> you're using the same binary/bpf.
> 
> I think this should read:
> 
> "This means you don't need debuginfo in the remote machine unless you're
> using a _different_ binary/bpf"

Oops, right. unless different one, is correct.

> 
> or, alternatively:
> 
> "This means you don't need debuginfo in the remote machine _as long as_
> you're using the same binary bpf"

Yes, thanks!

> 
> No?
> 
> - Arnaldo
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-- 
Masami HIRAMATSU
Linux Technology Research Center, System Productivity Research Dept.
Center for Technology Innovation - Systems Engineering
Hitachi, Ltd., Research & Development Group
E-mail: masami.hiramatsu.pt@...achi.com
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