linux-kernel - Re: Funny perf

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] [day] [month] [year] [list]

Message-ID: <20110223122904.GA3935@aftab>
Date:	Wed, 23 Feb 2011 13:29:04 +0100
From:	Borislav Petkov <bp@...64.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Borislav Petkov <bp@...64.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Funny perf

On Wed, Feb 23, 2011 at 05:21:48AM -0500, Peter Zijlstra wrote:
> On Thu, 2011-02-17 at 19:26 +0100, Borislav Petkov wrote:
> > 
> > so this looks like some of the samples do not belong in the perf.data
> > output with that garbled cpu field. It lets me also assume that the
> > sample->time field is also crap so the timestamp check is falsely
> > tripped. 
> 
> Most interesting, I haven't tried to reproduce, but it does sound
> smelly.
> 
> I did have a quick peek at some code I suspected but that all seems in
> order. I guess someone will have to sit down and figure this out proper,
> if nobody steps up I guess it'll have to be me, but that also means it
> might take a while since I've got some other pending stuff to stare at
> before this :/

Same here, I'll try to play with this a bit more when I get a free
window. I think the first step should be if someone else tries
reproducing this to see whether it really is reproducible or there's
something wrong with my setup.

Thanks.

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
General Managers: Alberto Bozzo, Andrew Bowd
Registration: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632
--
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/