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SubjectRe: Disk is cheap?
On Wed, 31 Jan 2001, Robert Kaiser wrote:

> Date: Wed, 31 Jan 2001 17:12:47 +0100
> From: Robert Kaiser <rob@sysgo.de>
> To: Patrizio Bruno <patrizio@dada.it>, linux-kernel@vger.kernel.org
> Subject: Re: Disk is cheap?
>
> In article <Pine.LNX.4.10.10101311550150.3588-100000@blacksheep.at.dada.it>,
> patrizio@dada.it (Patrizio Bruno) writes:
> > I built a embedded dvd/cdda/mp3 player based on linux, using a p200mmx
> > with 24mb with a bus of 75mhx, but it still takes about 20 seconds to boot,
> > I think that an embedded device (for home use) should boot in less than
> > 5 seconds, how could be possible with a slow p133? (I've also tried a p133
> > on 66mhz of bus and it takes almost 35 seconds to boot)
>
> Usually most of the startup time is spent by the BIOS doing
> extensive self-test stuff and for firing up services (http,
> inetd, sendmail, ...) that many embedded systems have little use for.
>
> I have a 25MHz 386EX (~2.2 Bogomips) here that boots Linux out of ROM
> in roughly 30 seconds. Most of _that_ time however is spent decompressing
> the kernel.
>
[...]
If someone would modify kernel to allow LZO compression then the
decompression would be 3 times faster at the expense of
compressed part of the image being 9..10% larger (assuming LZO1X-999/9
method used by lzop -9)
(I have done decompression speed tests on Pentium MMX 166 MHz)

Best regards,

Wojtek
--------------------
Wojtek Pilorz
Wojtek.Pilorz@bdk.pl

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