linux-kernel - Re: [PATCH] perf, x86: Enabled PEBS event to be exported in a raw format

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: <CABPqkBQ6Ot8fQLtMCbAiPFWPhajaGB-HEsYmLYRY8_Xee8sBNg@mail.gmail.com>
Date:	Thu, 28 Jun 2012 18:27:06 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Feng Tang <feng.tang@...el.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	x86@...nel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] perf, x86: Enabled PEBS event to be exported in a raw format

My patchset does not cover the general PEBS case (not LL). However, I
think we can leverage
the machine state captured by PEBS by adding a simple patch on top of
Jiri's sample regs
patchset. I have experimented with that last week. One interesting
measurement you can make
on SNB once you have that is : value profiling. That means sampling
the values of function
arguments. I think we can fit this into perf report.

My problem with the script approach is that you may end up
re-inventing a lot of the infrastructure
already in perf in terms of histograming and sorting. I think scripts
are good for dumping
the raw data or very simply analysis. Now I recognize that they are
handy to implement
mahcine specific decoding of the samples.

On Thu, Jun 28, 2012 at 6:19 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Thu, 2012-06-28 at 18:15 +0200, Stephane Eranian wrote:
>> I will cover some useful use cases with my PEBS-LL patchset + perf
>> support.
>>
> OK, I'll wait for those then.
--
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/