linux-kernel - Re: scheduler vs hardware? (was Re: another i7 (linux) bug?)

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]

Date:	Fri, 22 Jan 2010 10:25:14 +0100
From:	Mike Galbraith <efault@....de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Luca Zini <luca.zini@...il.com>, aagaande@...il.com,
	rdelcueto@...mail.com, mingo@...e.hu,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Alex Chiang <achiang@...com>
Subject: Re: scheduler vs hardware? (was Re: another i7  (linux) bug?)

On Fri, 2010-01-22 at 09:51 +0100, Peter Zijlstra wrote:

> My laptop does:
> 
> 
> # time nice -n 19 lame -b 256 -V0 -h youcantdothat.wav - > /dev/null

> real    0m3.273s
> user    0m3.217s
> sys     0m0.022s
> 
> 
> # time nice -n 0 lame -b 256 -V0 -h youcantdothat.wav - > /dev/null

> real    0m1.121s
> user    0m1.102s
> sys     0m0.013s

I don't see any way that can be scheduler (knocks wood).  Could it be
cpufreq?  IIRC there is or was an ignore nice gizmo in there.

	-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/