[olug] Reducing bootup time, Open Source style

Tim OBrien IrishMASMS at OLUG.ORG
Sun Dec 5 22:32:27 UTC 2004


> ---------- Forwarded message ----------
> From: Paul <paul at oz.net>
> Date: Fri, 3 Dec 2004 00:24:09 -0800 (PST)
> Subject: [SLL] Reducing bootup time, Open Source style
> To: Seattle Linux List <linux-list at ssc.com>
> I got a kick out of reading these posts, and thought I'd
> forward it to y'all.  It nicely illustrates the synergy across
> the globe between developers and an Open Source company, and the
> speed with which things were fixed.  Summary:
>     http://lwn.net/Articles/110563/
> First, Owen Taylor of RedHat posted a challenge to visualize the
> boot up process, in order to help reduce overall boot time:
> http://www.redhat.com/archives/fedora-devel-list/2004-November/msg00447.html
> Some guy in Slovenia took up that challenge and came up with
> a Java based program, bootchart, that parses "top" output and produces
> a graph, which revealed that rhgb (RedHat Graphical Boot) was spinning
> its wheels:
> http://www.klika.si/ziga/bootchart/images/bootchart.initial.png
> This page shows bootchart graphs for other distros:
> http://www.klika.si/ziga/bootchart/
> RedHat immediately fixed rhgb and posted an upgrade for FC3:
> http://www.redhat.com/archives/fedora-devel-list/2004-November/msg00732.html
> http://www.klika.si/ziga/bootchart/bootchart-rhgbfix.png
> A RedHat guy in Denmark ran with this info and did some more optimizations
> (e.g. replacing rhgb with gdm, optimizing disk readaheads):
> http://www.redhat.com/archives/fedora-devel-list/2004-November/msg01374.html
> ~40 seconds to a GNOME desktop ain't bad at all. :)
> -- Paul

Timothy "Irish" O'Brien
Previous Publicity & Social activities chairperson
Omaha Linux User's Group (OLUG)
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