From: Tim Bird <tim.bird@am.sony.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.8-rc1-mm1
Date: Wed, 14 Jul 2004 14:53:27 -0700 [thread overview]
Message-ID: <40F5AB57.6080507@am.sony.com> (raw)
In-Reply-To: <20040713182559.7534e46d.akpm@osdl.org>
Andrew Morton wrote:
> +preset-loops_per_jiffy-for-faster-booting.patch
>
> Add the "lpj=" kernel boot option
I tested this...
With HZ=1000:
- normal boot: calibrate_delay() took 23 milliseconds
- specifying lpj=xxx: calibrate_delay() took 43 microseconds.
With HZ=100:
- normal boot: calibrate_delay() took 264 milliseconds
- specifying lpj=xxx: calibrate_delay() took 43 microseconds.
No adverse behaviour was observed.
This will be a big improvement for embedded folks.
Thanks,
-- Tim
=============================
Tim Bird
Architecture Group Co-Chair, CE Linux Forum
Senior Staff Engineer, Sony Electronics
E-mail: tim.bird@am.sony.com
=============================
next prev parent reply other threads:[~2004-07-14 21:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-14 1:25 2.6.8-rc1-mm1 Andrew Morton
2004-07-14 7:29 ` 2.6.8-rc1-mm1 Andrew Morton
2004-07-14 8:11 ` 2.6.8-rc1-mm1 David Howells
2004-07-14 16:36 ` 2.6.8-rc1-mm1 John Cherry
2004-07-14 18:49 ` [patch] 2.6.8-rc1-mm1: USB w9968cf compile error Adrian Bunk
2004-07-14 19:03 ` Greg KH
2004-07-14 19:08 ` Adrian Bunk
2004-07-14 20:29 ` 2.6.8-rc1-mm1 Dominik Karall
2004-07-14 20:43 ` [patch] 2.6.8-rc1-mm1: 8139too: uninline rtl8139_start_thread Adrian Bunk
2004-07-14 20:45 ` Jeff Garzik
2004-07-27 18:00 ` Jeff Garzik
2004-07-14 21:08 ` 2.6.8-rc1-mm1 Dominik Karall
2004-07-14 21:53 ` Tim Bird [this message]
2004-07-15 10:35 ` 2.6.8-rc1-mm1 Ralf Hildebrandt
2004-07-18 3:53 ` [patch] 2.6.8-rc1-mm1: work around broken USB DocBook generation Adrian Bunk
2004-07-20 0:02 ` 2.6.8-rc1-mm1 J.A. Magallon
2004-07-22 12:56 ` 2.6.8-rc1-mm1 Jens Axboe
2004-07-20 0:05 ` 2.6.8-rc1-mm1 J.A. Magallon
-- strict thread matches above, loose matches on Subject: below --
2004-07-15 3:33 2.6.8-rc1-mm1 Diffie
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