linux-kernel - Re: perf top -g -U --sort=symbol --children == lalalalala?

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: <1410439392.20184.17.camel@marge.simpson.net>
Date:	Thu, 11 Sep 2014 14:43:12 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Namhyung Kim <namhyung@...il.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: perf top -g -U --sort=symbol --children == lalalalala?

On Thu, 2014-09-11 at 17:09 +0900, Namhyung Kim wrote: 
> On Tue, Sep 9, 2014 at 10:37 PM, Arnaldo Carvalho de Melo
> <acme@...stprotocols.net> wrote:
> > Em Tue, Sep 09, 2014 at 01:54:01PM +0200, Mike Galbraith escreveu:
> >> Seems the now default on --children thingy doesn't like -U much.
> >
> > Namhyung, can you please take a look at this?
> 
> So what is the problem here?

Well, if you don't see anything wrong, I guess nothing at all.

> >> Samples: 5K of event 'cycles', Event count (approx.): 2268660922
> >>   Children      Self  Symbol
> >> +   46.42%     0.04%  [k] system_call_fastpath

I'll just turn it off until I figure out what cool stuff this is telling
me. why that symbol becomes the number one hit, and why total% > 100.

To me, it looks like top smoked it's breakfast, went to lala land ;-)

-Mike

--
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/