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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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