linux-kernel - Re: [PATCH v4 2/3] Support for perf to probe into SDT markers:

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <877gcw7ie8.fsf@sejong.aot.lge.com>
Date:	Tue, 29 Oct 2013 14:31:11 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Pekka Enberg <penberg@....fi>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Hemant Kumar <hkshaw@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	hegdevasant@...ux.vnet.ibm.com, Ingo Molnar <mingo@...hat.com>,
	anton@...hat.com, systemtap@...rceware.org,
	aravinda@...ux.vnet.ibm.com
Subject: Re: [PATCH v4 2/3] Support for perf to probe into SDT markers:

Hi Masami,

On Tue, 29 Oct 2013 12:19:37 +0900, Masami Hiramatsu wrote:
> (2013/10/29 2:48), Pekka Enberg wrote:
>> For the 32-bit and 64-bit libc case, why cannot 'perf list'
>> by default print out something like:
>> 
>> $ perf list
>> 
>>    libc:setjmp [SDT marker group]
>> 
>> and provide a '--fully-qualified' command line option that:
>> 
>> $ perf list --fully-qualified
>> 
>> libc:setjmp => libc32:setjmp, libc64:setjmp      [SDT marker group]
>> libc32:setjmp => libc:setjmp@...b/libc.so.6      [SDT marker]
>> libc64:setjmp => libc:setjmp@...b64/libc.so.6  [SDT marker]
>> 
>> and then teach 'perf trace' to deal with SDT marker groups
>> where you trace two events, not one?
>
> Ah, that's a good idea. :)
> And it also is needed for another probe event because
> sometimes inlined functions have multiple instances.
> I'd like to fold them as one event group.

Yes, I'd love to see it as well. :)

Thanks,
Namhyung
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/