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<H1>[Mageia-dev] Debugging boot times</H1>
<B>Colin Guthrie</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Debugging%20boot%20times&In-Reply-To=%3C4EB9C185.8060705%40colin.guthr.ie%3E"
TITLE="[Mageia-dev] Debugging boot times">mageia at colin.guthr.ie
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<I>Wed Nov 9 00:55:49 CET 2011</I>
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<PRE>'Twas brillig, and Colin Guthrie at 08/11/11 23:48 did gyre and gimble:
><i> Hi,
</I>><i>
</I>><i> I've just pushed bootchart to the build system.
</I>><i>
</I>><i> If you want to get a nice log of how things work, just install
</I>><i> bootchart-daemon and then boot with the kernel command line:
</I>><i>
</I>><i> init=/sbin/bootchartd
</I>><i>
</I>><i> If you normally need init=/bin/systemd, then use instead:
</I>><i>
</I>><i> init=/sbin/bootchartd bootchart_init=/bin/systemd
</I>><i>
</I>><i>
</I>><i> Once you've booted, you can analyse the chart info via running
</I>><i> "bootchart". This will create a bootchart.png file which we can then use
</I>><i> to help diagnose problems etc.
</I>><i>
</I>><i> At the moment on my system, waiting for network-up is causing some
</I>><i> slowdowns for example. I don't need the network to be up to be able to
</I>><i> login (on my system) and thus I'd rather display gdm sooner rather than
</I>><i> wait. Useful stuff.
</I>
Incidentally, this will only work for stuff that is done post initrd.
There is also a dracut module to enable bootchart inside the initrd, but
I've not played with that nor know how to enable it (if you even need to
enable it - perhaps it just works - like I say, I've not looked)
Col
--
Colin Guthrie
colin(at)mageia.org
<A HREF="http://colin.guthr.ie/">http://colin.guthr.ie/</A>
Day Job:
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